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Papers by suhendrayatna suhendrayatna

Open Access Macedonian Journal of Medical Sciences

BACKGROUND: Faunus ater is one of the macrozoobenthos that is often consumed by the community, es... more BACKGROUND: Faunus ater is one of the macrozoobenthos that is often consumed by the community, especially in the Leupung and Lhoknga areas, Aceh Besar District. The presence of Pb and Zn is suspected to be able to damage the body cells of F. ater, especially the ovotestis organ. Ovotestis is an organ in mollusks in general that can produce egg cells and sperm cells simultaneously. AIM: The purpose of this study was to analyze the level of damage to the Ovotestis of F. ater based on the state of the damaged Ovotestis cells. METHODS: The method of this research method is F. ater that samples were taken from Bale and Reuleung River, each river is divided into three stations and at each station, three samples of F. ater are taken. Ovotestical histopathological analysis was carried out at the Histology Laboratory, Faculty of Veterinary Medicine, Syiah Kuala University. Preparation of ovotestis histology preparations using the paraffin method. Previously, F. ater was terminated and carcas...

Open Access Macedonian Journal of Medical Sciences

BACKGROUND: Gold mining, especially by the community, causes many problems. One of the problems i... more BACKGROUND: Gold mining, especially by the community, causes many problems. One of the problems is the increase in mercury pollution. The amalgamation technique involving mercury in the gold processing process is still widely used by miners and has the potential to threaten the health of workers and the surrounding community. AIM: This study aimed to identify mercury levels in soot at the location of a traditional gold processing plant in Paya Seumantok Village, Krueng Sabee District, Aceh Jaya District. METHODS: This research was conducted at the Environmental Quality Analysis laboratory, Chemical Engineering Department, Syiah Kuala University, Banda Aceh, in May–August 2021. The sample in this study was soot caught on cloth attached to the gold kiln location by amalgamation using the quadrant method. The soot sample was obtained from the people’s gold processing unit in Gampong Paya Seumantok, Krueng Seabee District; then, the fabric sample containing soot was destroyed using HNO3...

Aceh International Journal of Science and Technology, 2020

The use of a low-cost biosorbent prepared from Ipomoea pes-caprae stem for the adsorption of Cd(I... more The use of a low-cost biosorbent prepared from Ipomoea pes-caprae stem for the adsorption of Cd(II) ions from aqueous solution at different contact times, biosorbent sizes, pH values, and initial Cd(II) ions concentration solution was investigated. The biosorbent was analyzed using Fourier-transform infrared spectroscopy (FT-IR) to find important IR-active functional groups. A scanning electron microscope (SEM) was used to examine the biosorbent morphology. The experimental results showed the highest Cd(II) ions adsorption was 29.513 mg/g under an optimal condition as initial Cd(II) ions concentration of 662.77 mg/L, 1 g dose, 80-min contact time, pH 5, 75 rpm of stirring speed, 1 atm, and 30 oC. Cd(II) ions' adsorption kinetics obeys the linearized pseudo-second-order kinetics (R2 = 0.996), and the adsorption capacity is based on the optimal condition, and the rate attained was 44.444 mg/g and 0.097 g/mg. Min, respectively. Besides, the adsorption isotherms were very well fitt...

Jurnal Arsip Rekayasa Sipil dan Perencanaan, 2018

Jurnal Sains dan Teknologi Reaksi, 2016

Berkaitan dengan pengaruh logam timbal pada ekosistem perairan, studi tentang toksisitas dan akum... more Berkaitan dengan pengaruh logam timbal pada ekosistem perairan, studi tentang toksisitas dan akumulasi logam timbal ada ikan Plati (Oryzias latipes) dilakukan pada skala laboratorium. Hasil penelitian menunjukkan bahwa lethal concentration 50 % (LC50) logam timbal terhadap ikan Plati (Oryzias latipes) adalah sebesar 947,7 ppm. Pada saat ikan Plati (Oryzias latipes) dihidupkan pada air yang mengandung timbal, jumlah timbal yang diakumulasikan pada sel meningkat sejalan meningkatnya konsentrasi timbal pada air. Selama 3 hari pemaparan, sebanyak 80% dari timbal yang terakumulasi dalam sel tersebut diekskresikan pada air.Kata kunci : Toksisitas, Bioakumulasi, dan Ikan Plati (Oryzias latipes).

Toxicological & Environmental Chemistry, 1999

ABSTRACT The bioaccumulation and biotransformation of arsenic compounds by freshwater Daphnia mag... more ABSTRACT The bioaccumulation and biotransformation of arsenic compounds by freshwater Daphnia magna (D. magna) including its tolerance against arsenicals were investigated. When D. magna was exposed to a medium containing arsenicals, total arsenic metabolite in cell increased with an increase in the arsenic concentration in the medium. D. magna accumulated total arsenic in their cells higher from the medium containing arsenate [As(V)] than from medium containing arsenite [As(III)]. No methylation occurred when D. magna was exposed to methylarsonic acid (MAA) and dimethylarsinic acid (DMAA). Trimethylarsenic species was not detected in cells. Lethal concentration of D. magna against As(III), As(V), MAA and DMAA were 1.7, 5, 12 and 250mg As/L, respectively. No toxic effect of arsenic‐containing algal diets on the growth of D. magna was observed up to 1130 mg As/kg.

che.unsyiah.ac.id

Ammonia biosorption by using Enceng Gondok, Eichhornia crassipes, was conducted in outdoor labora... more Ammonia biosorption by using Enceng Gondok, Eichhornia crassipes, was conducted in outdoor laboratory with objective to study the influence residence time and plant age to ammonia biosorption rate. The research uses reactor test consisting of wet land and sludge. Enceng Gondok is planted on reactor test flown by ammonia as bacth with relatif low enough concentration (2 mg/L), water height 20 cm, plant's number in each reactor of 4 stems with variatious plant's length 10, 20, 30, and 40 cm, and various residence time 2, 4, 6, and 8 days. Each test conducted was completed by controlling reactor. Research result showed that maximun biosorption occurs at 2 days culturization; ammonia biosorption rate by roots increases as residence time increases. Residence time 2, 4, 6 and 8 days can decrease ammonia concentration up to 1.568 mg/l, 0.245 mg/l, 0.204 mg/l (10%), and 0.022 mg/l, respectively, at plant length 10 cm. Further, research results showed that the more the plant's age, the larger the biosorption by plant.

Chemosphere, 2002

Accumulation, transformation and toxicity of arsenic compounds to Japanese Medaka, Oryzias latipe... more Accumulation, transformation and toxicity of arsenic compounds to Japanese Medaka, Oryzias latipes were investigated. For sodium arsenite [As(III)] and disodium arsenate [As(V)], the mean value for 7-day lethal concentration LC 50 for O. latipes were 14.6 and 30.3 mg As/l, respectively. Direct accumulation of arsenic in O. latipes increased as a function of As(III) concentration in water. A small proportion of accumulated arsenic was transformed to methylated arsenic. As much as 70% of the total arsenic accumulated in tissue was depurated. Accumulation and transformation of As(III) by O. latipes in a simple freshwater food chain were also investigated. The transformation of As(III) to As(V) by organisms was more prevalent than biomethylation of accumulated arsenic in organisms of the three steps of the food chain.

Applied Organometallic Chemistry, 2001

ABSTRACT Bioaccumulation and biotransformation of arsenite by freshwater organisms consisting Dap... more ABSTRACT Bioaccumulation and biotransformation of arsenite by freshwater organisms consisting Daphnia magna, Neocaridina denticulata and Tilapia mossambica has been studied. When organisms were exposed to a medium containing arsenite, the total arsenic concentration accumulated by the organisms increased with an increase in the arsenic concentration in the medium. The order of total arsenic accumulation by freshwater organisms was D. magna > N. denticulata > T. mossambica. Bioaccumulation and biotransformation of arsenite in three-step laboratory food-chain models was investigated by feeding a diet of arsenite-dosed alga (Chlorella vulgaris) to herbivorous grazers (D. magna and N. denticulata) and then the herbivores were fed to carnivorous fish (T. mossambica and Zacco platypus). Total arsenic concentrations in the organisms decreased by an order of magnitude for each step in the food chain. Arsenite and arsenate were accumulated as the predominant arsenic species in organisms. Little methylation of arsenic in organisms occurred at each step in the food chain. Copyright © 2001 John Wiley & Sons, Ltd.

Applied Organometallic Chemistry, 2001

ABSTRACT Arsenic concentration and arsenic speciation in the liver, intestine, ovary, bone, brain... more ABSTRACT Arsenic concentration and arsenic speciation in the liver, intestine, ovary, bone, brain, muscle, gill and eye of the freshwater fish Tilapia mossambica exposed to arsenic were investigated. The profile of arsenic distribution­in tissues of T. mossambica after exposure­to a medium containing arsenate was brain >­intestine > ovary > eyes > muscle > gill > bone­> liver. The minimum content of arsenic is in liver tissue (2.5 μgAs g-1 dry weight), whereas the maximum content is in brain tissue (61.8 μgAs­g-1 dry weight). Arsenic accumulated in liver tissue was present as methylated arsenic species, and no inorganic arsenic species were found in liver tissue. A notable exception is in brain tissue. Most arsenic accumulated in brain tissue was inorganic arsenic species, and no methylated arsenic was found in brain tissue. In a dietary exposure treatment, the maximum arsenic accumulation in the tissue of T. mossambica fed with Neocaridina denticulata dosed with arsenic from a Chlorella vulgaris diet (via the food chain) is in the ovary (7.4 μgAs g-1 dry weight), followed by gill, liver, muscle, bone, brain, eyes and intestine. Trace amounts of methylated arsenic were found in liver tissue in this treatment. Methylated arsenic in fish exposed via water was more evenly distributed in the organs compared with dietary exposure. Copyright © 2001 John Wiley & Sons, Ltd.

Applied Organometallic Chemistry, 1999

The freshwater green alga, Chlorella vulgaris, was cultivated in a modified Detmer medium in the ... more The freshwater green alga, Chlorella vulgaris, was cultivated in a modified Detmer medium in the presence of arsenite in order to investigate tolerance, accumulation, transformation and excretion of arsenic species. When the alga was exposed to arsenite, arsenic accumulation markedly increased in the beginning of the log phase, rose to a maximum of 610 mg As g À1 and then decreased during the period from 40 to 120 h after inoculation. Arsenate was the major metabolite in the algal cell; trimethylarsenical species (TMA) were also found 36 h after inoculation when the alga was exposed to arsenite at levels of 70-100 mg As cm À3. At arsenite levels of 10-20 mg As cm À3 , cell growth was higher than in an arsenic-free medium. Arsenite accumulated in Chlorella vulgaris was transformed to arsenate through bio-oxidation and to a small degree to methyl-, dimethyl-, and trimethyl-arsenic species through biomethylation. Furthermore, the arsenic metabolites were readily excreted under conditions undesirable for the growth of the alga. Total arsenic accumulation decreased with an increase in arsenite concentration in the medium. Copyright # 1999 John Wiley & Sons, Ltd.

Jurnal IPA & Pembelajaran IPA, 2021

Salinity is the amount of salt contained or dissolved in water or soil. Salinity can cause the ch... more Salinity is the amount of salt contained or dissolved in water or soil. Salinity can cause the change of physical characteristics of soil, especially in coastal area, that affects human daily activities, including agriculture. Baitussalam District (Kecamatan Baitussalam) is one of the districts that was hit most devastatingly by the Indian Ocean Tsunami 2004 as well as has large population with potential agricultural prospect in Aceh Besar Region (Kabupaten Aceh Besar). This research aims to identify the soil salinity level in the Baitussalam District. The sampling technique uses descriptive methodology with scalable quantitative approach in the chosen sampling areas. 26 sampling spots have been chosen according to mathematical calculation. Quantitative method is used to analyze the result in this research. Furthermore, conductivity measurement is done through induction electromagnetic method, using Geonics EM38 and to identify the soil salinity level, analysis of soil texture is co...

Jurnal IPA & Pembelajaran IPA, 2022

The research has been carried out to assess the rate of desertification of the karst ecosystem re... more The research has been carried out to assess the rate of desertification of the karst ecosystem regarding land damage in the Darul Imarah, Aceh Besar District. This study aims to determine the level of damage to the karst ecosystem and its effect on water quality and to determine the condition of land cover in the Mata Ie karst ecosystem., Aceh Besar District. The data collection method used is using Landsat 8 satellite imagery to assess the level of damage to the karst ecosystem area. The assessment of water quality and quantity was carried out by means of a direct survey in the Mata Ie karts ecosystem area by analyzing BOD, COD, TDS, Turbidity, DO, Temperature and pH. The results of the assessment of the level of damage to the kart ecosystem area of the Mata Ie area have changed. The results of the study prove that due to land clearing for plantation activities in the Mata Ie area and also as a tourist spot, the conditions in the area are not desertification, Karst area which consi...

Calotropis gigantea stems (CGS) has the potential to use as biosorbent for adsorption of Cu(II) i... more Calotropis gigantea stems (CGS) has the potential to use as biosorbent for adsorption of Cu(II) ions. In this study, the CGS biosorbent (CGSB) was prepared by drying and grounding. The effect of independent variables on adsorption capacity were investigated. As the result, the maximum adsorption capacity of 53.457 mg/g was obtained the optimal condition which was initial Cu(II) ions concentration of 567.47 mg/L, CGSB size of less than 230 mesh, CGSB mass of 1 g, temperature of 27 o C, pH 5, and contact time of 60 min. The CGSB surface morphology was analysed using SEM. The adsorption of Cu(II) ions fitted well with pseudo first-order adsorption kinetic (PFO-AK) model (R 2 =0.99), and the PFO-AK adsorption capacity and rate constant obtained were 70.194 mg/g and 0.0877 g/mg.min, respectively. The adsorption isotherm of Cu(II) ions was in accordance with Freundlich model (R 2 =0.99), and the intensity and volume constants attained were 0.876 and 1.017 L/mg, respectively. This result s...

Water quality assessment in the tsunami-affected areas conducted in Meuraxa and Kutaradja sub-dis... more Water quality assessment in the tsunami-affected areas conducted in Meuraxa and Kutaradja sub-districts in the area of Banda Aceh City. Water samples were collected in October 2006 from dug wells of tsunami-affected areas. These were characterized for various physical and chemical parameters. Water quality in the selected areas has shown that the surface water was contaminated due to the tsunami. Total Dissolved Solid, Total Suspended Solid, Acidity, and salinity were high in the affected areas indicating saline water intrusion into surface water tables. Dug wells in the highly affected locations showed higher values of heavy metal ions like Mn, Pb, Cu, Fe, Zn, and Cu compared to the reference points. No ion Hg was found in all samples. Keywords: Banda Aceh, heavy metals, tsunami, water quality

Abstract. This research was conducted to examine the growth of green microalgae in Palm Oil Mill ... more Abstract. This research was conducted to examine the growth of green microalgae in Palm Oil Mill Effluent (POME). Cultivation was done to eliminate nutrients in POME with different concentrations biomass produced by green microalgae. Results showed that the best growth of green microalgae with the highest content of biomass obtained in cultivation in media with 30% effluent concentration with 4x8 watt lighting for 8 hours. Biomass obtained from this treatment was 1.20 g-dry weight/L. Green microalgae metabolic processes proven to reduce and eliminate nutrients in POME reaches 40-100% of the concentration of COD and BOD. Based on this research, green microalgae can be used to reduce and eliminate the concentration of organic substances in POME as one of the alternative methods of waste management. Keywords: green microalgae, Palm Oil Mill Effluent (POME), nutrient, and urea.

This research focused to study the effect of phosphate (as KH 2 PO 4 ) on mercury accumulation by... more This research focused to study the effect of phosphate (as KH 2 PO 4 ) on mercury accumulation by Aquatic Plant, Thypa Latifolia. Five stems of Thypa latifolia was cultured for five weeks in water containing mercury ion (10 mg-Hg/L) in pounds under controlled condition. Kalium Dihydrogenphosphate has been added to know the effect of phosphate at different concentrations (0; 5; 10; and 15 m-moles PO 4 ) and no phosphate added in the water phase for control media. Biomass samples (shoots, stems, and leaves) from every pounds were taken for every treatment period and mercury concentration in biomass were measured by using Atomic Absorption Spectrophotometer Shimadzu AA 630 under standard procedure after digested. Results showed that the growth of Typha latifolia higher with the presence of phosphate in water phase, however the presence of phosphate could not promote better mercury accumulation from water phase. Accumulated mercury was found highest in roots than other part of plant. Th...

The aim of this research was to examine the status of water qaility of the Krueng Aceh estuary an... more The aim of this research was to examine the status of water qaility of the Krueng Aceh estuary and heavy metal content in water and sediment. Data were taken by direct measurement in the field (in situ) and in the laboratory (ex situ). Three sampling stations were determined by purposive sampling, namely; in the left bank (nearest location with TPA), right bank (nearest location to market) and middle river (middle river area often passed by fisherman boat). Heavy metal analysis was conducted using AAS (Atomic Absorption Spectrophotometer) method and water quality status determined by STORET method. Based on the research result showed that that water quality parameters that have passed the standard of PP RI No. 82 Year 2001 Group III is TDS with an average value of 3332.78 mg / L, Pb with an average value of 0.052 mg / L, and Cd with an average value of 0.015 mg / L. The quality status of Krueng Aceh estuary water is classified into a moderate polluted or class C with a score of -23....

Canna Sp. is one of the plants that can live in conditions of wetland cultivated in freshwater co... more Canna Sp. is one of the plants that can live in conditions of wetland cultivated in freshwater courses, which often serve as recipients for domestic and other sorts of wastewater. In the context of its life ability, this study deals to investigate the capacity of Canna Sp. in uptake toxic heavy metal mercury from a wetland system. Canna Sp. was cultivated in a polybag contained wastewater for a couple months to reach acclimatization. The wastewater contained mercury ions in different concentrations of 1.2; 0.96 and 0.36 mg-Hg/L. Each polybags contained five stems of Canna Sp. Control media (contain no mercury in media) were also prepared for these treatments. During 14 days of the experiment, the atmospheric air and water temperature (30+3 oC is optimum) were maintained and every five days, length of stems, concentration of mercury ion in water phase, and its tissue were analyzed. The concentration of mercury in shoots, leaves, and roots were analyzed by Atomic Absorption Spectropho...

Toxics

The purpose of this study was to investigate the toxicity and the distribution of mercury (Hg) in... more The purpose of this study was to investigate the toxicity and the distribution of mercury (Hg) in the main tissues of freshwater fish (Oreochromis niloticus) after being exposed to water containing Hg(II). A sample group of 10 fish, of mean weight 80–100 g wet weight, were exposed to different concentrations of Hg (0.0012; 0.0049; 0.0141; 0.0524; 0.1126; and 0.5110 mg-HgII/L) for 72 hours under controlled conditions using the static method in ponds. A control medium was also prepared in two replications. Mortality of fish was closely monitored, and the test was repeated three times. For the toxicity test, observations were based on behavior, mortality, and anatomical pathology. The methodology was based on the OECD guidelines for testing of chemicals and lethal concentration (LC50) and particularly using the probit method. Thus, the mean value was obtained from two replications and then further calculated by a software (MiniTab® 16 version). Prior to analysis, samples were first lyo...

Open Access Macedonian Journal of Medical Sciences

BACKGROUND: Faunus ater is one of the macrozoobenthos that is often consumed by the community, es... more BACKGROUND: Faunus ater is one of the macrozoobenthos that is often consumed by the community, especially in the Leupung and Lhoknga areas, Aceh Besar District. The presence of Pb and Zn is suspected to be able to damage the body cells of F. ater, especially the ovotestis organ. Ovotestis is an organ in mollusks in general that can produce egg cells and sperm cells simultaneously. AIM: The purpose of this study was to analyze the level of damage to the Ovotestis of F. ater based on the state of the damaged Ovotestis cells. METHODS: The method of this research method is F. ater that samples were taken from Bale and Reuleung River, each river is divided into three stations and at each station, three samples of F. ater are taken. Ovotestical histopathological analysis was carried out at the Histology Laboratory, Faculty of Veterinary Medicine, Syiah Kuala University. Preparation of ovotestis histology preparations using the paraffin method. Previously, F. ater was terminated and carcas...

Open Access Macedonian Journal of Medical Sciences

BACKGROUND: Gold mining, especially by the community, causes many problems. One of the problems i... more BACKGROUND: Gold mining, especially by the community, causes many problems. One of the problems is the increase in mercury pollution. The amalgamation technique involving mercury in the gold processing process is still widely used by miners and has the potential to threaten the health of workers and the surrounding community. AIM: This study aimed to identify mercury levels in soot at the location of a traditional gold processing plant in Paya Seumantok Village, Krueng Sabee District, Aceh Jaya District. METHODS: This research was conducted at the Environmental Quality Analysis laboratory, Chemical Engineering Department, Syiah Kuala University, Banda Aceh, in May–August 2021. The sample in this study was soot caught on cloth attached to the gold kiln location by amalgamation using the quadrant method. The soot sample was obtained from the people’s gold processing unit in Gampong Paya Seumantok, Krueng Seabee District; then, the fabric sample containing soot was destroyed using HNO3...

Aceh International Journal of Science and Technology, 2020

The use of a low-cost biosorbent prepared from Ipomoea pes-caprae stem for the adsorption of Cd(I... more The use of a low-cost biosorbent prepared from Ipomoea pes-caprae stem for the adsorption of Cd(II) ions from aqueous solution at different contact times, biosorbent sizes, pH values, and initial Cd(II) ions concentration solution was investigated. The biosorbent was analyzed using Fourier-transform infrared spectroscopy (FT-IR) to find important IR-active functional groups. A scanning electron microscope (SEM) was used to examine the biosorbent morphology. The experimental results showed the highest Cd(II) ions adsorption was 29.513 mg/g under an optimal condition as initial Cd(II) ions concentration of 662.77 mg/L, 1 g dose, 80-min contact time, pH 5, 75 rpm of stirring speed, 1 atm, and 30 oC. Cd(II) ions' adsorption kinetics obeys the linearized pseudo-second-order kinetics (R2 = 0.996), and the adsorption capacity is based on the optimal condition, and the rate attained was 44.444 mg/g and 0.097 g/mg. Min, respectively. Besides, the adsorption isotherms were very well fitt...

Jurnal Arsip Rekayasa Sipil dan Perencanaan, 2018

Jurnal Sains dan Teknologi Reaksi, 2016

Berkaitan dengan pengaruh logam timbal pada ekosistem perairan, studi tentang toksisitas dan akum... more Berkaitan dengan pengaruh logam timbal pada ekosistem perairan, studi tentang toksisitas dan akumulasi logam timbal ada ikan Plati (Oryzias latipes) dilakukan pada skala laboratorium. Hasil penelitian menunjukkan bahwa lethal concentration 50 % (LC50) logam timbal terhadap ikan Plati (Oryzias latipes) adalah sebesar 947,7 ppm. Pada saat ikan Plati (Oryzias latipes) dihidupkan pada air yang mengandung timbal, jumlah timbal yang diakumulasikan pada sel meningkat sejalan meningkatnya konsentrasi timbal pada air. Selama 3 hari pemaparan, sebanyak 80% dari timbal yang terakumulasi dalam sel tersebut diekskresikan pada air.Kata kunci : Toksisitas, Bioakumulasi, dan Ikan Plati (Oryzias latipes).

Toxicological & Environmental Chemistry, 1999

ABSTRACT The bioaccumulation and biotransformation of arsenic compounds by freshwater Daphnia mag... more ABSTRACT The bioaccumulation and biotransformation of arsenic compounds by freshwater Daphnia magna (D. magna) including its tolerance against arsenicals were investigated. When D. magna was exposed to a medium containing arsenicals, total arsenic metabolite in cell increased with an increase in the arsenic concentration in the medium. D. magna accumulated total arsenic in their cells higher from the medium containing arsenate [As(V)] than from medium containing arsenite [As(III)]. No methylation occurred when D. magna was exposed to methylarsonic acid (MAA) and dimethylarsinic acid (DMAA). Trimethylarsenic species was not detected in cells. Lethal concentration of D. magna against As(III), As(V), MAA and DMAA were 1.7, 5, 12 and 250mg As/L, respectively. No toxic effect of arsenic‐containing algal diets on the growth of D. magna was observed up to 1130 mg As/kg.

che.unsyiah.ac.id

Ammonia biosorption by using Enceng Gondok, Eichhornia crassipes, was conducted in outdoor labora... more Ammonia biosorption by using Enceng Gondok, Eichhornia crassipes, was conducted in outdoor laboratory with objective to study the influence residence time and plant age to ammonia biosorption rate. The research uses reactor test consisting of wet land and sludge. Enceng Gondok is planted on reactor test flown by ammonia as bacth with relatif low enough concentration (2 mg/L), water height 20 cm, plant's number in each reactor of 4 stems with variatious plant's length 10, 20, 30, and 40 cm, and various residence time 2, 4, 6, and 8 days. Each test conducted was completed by controlling reactor. Research result showed that maximun biosorption occurs at 2 days culturization; ammonia biosorption rate by roots increases as residence time increases. Residence time 2, 4, 6 and 8 days can decrease ammonia concentration up to 1.568 mg/l, 0.245 mg/l, 0.204 mg/l (10%), and 0.022 mg/l, respectively, at plant length 10 cm. Further, research results showed that the more the plant's age, the larger the biosorption by plant.

Chemosphere, 2002

Accumulation, transformation and toxicity of arsenic compounds to Japanese Medaka, Oryzias latipe... more Accumulation, transformation and toxicity of arsenic compounds to Japanese Medaka, Oryzias latipes were investigated. For sodium arsenite [As(III)] and disodium arsenate [As(V)], the mean value for 7-day lethal concentration LC 50 for O. latipes were 14.6 and 30.3 mg As/l, respectively. Direct accumulation of arsenic in O. latipes increased as a function of As(III) concentration in water. A small proportion of accumulated arsenic was transformed to methylated arsenic. As much as 70% of the total arsenic accumulated in tissue was depurated. Accumulation and transformation of As(III) by O. latipes in a simple freshwater food chain were also investigated. The transformation of As(III) to As(V) by organisms was more prevalent than biomethylation of accumulated arsenic in organisms of the three steps of the food chain.

Applied Organometallic Chemistry, 2001

ABSTRACT Bioaccumulation and biotransformation of arsenite by freshwater organisms consisting Dap... more ABSTRACT Bioaccumulation and biotransformation of arsenite by freshwater organisms consisting Daphnia magna, Neocaridina denticulata and Tilapia mossambica has been studied. When organisms were exposed to a medium containing arsenite, the total arsenic concentration accumulated by the organisms increased with an increase in the arsenic concentration in the medium. The order of total arsenic accumulation by freshwater organisms was D. magna > N. denticulata > T. mossambica. Bioaccumulation and biotransformation of arsenite in three-step laboratory food-chain models was investigated by feeding a diet of arsenite-dosed alga (Chlorella vulgaris) to herbivorous grazers (D. magna and N. denticulata) and then the herbivores were fed to carnivorous fish (T. mossambica and Zacco platypus). Total arsenic concentrations in the organisms decreased by an order of magnitude for each step in the food chain. Arsenite and arsenate were accumulated as the predominant arsenic species in organisms. Little methylation of arsenic in organisms occurred at each step in the food chain. Copyright © 2001 John Wiley & Sons, Ltd.

Applied Organometallic Chemistry, 2001

ABSTRACT Arsenic concentration and arsenic speciation in the liver, intestine, ovary, bone, brain... more ABSTRACT Arsenic concentration and arsenic speciation in the liver, intestine, ovary, bone, brain, muscle, gill and eye of the freshwater fish Tilapia mossambica exposed to arsenic were investigated. The profile of arsenic distribution­in tissues of T. mossambica after exposure­to a medium containing arsenate was brain >­intestine > ovary > eyes > muscle > gill > bone­> liver. The minimum content of arsenic is in liver tissue (2.5 μgAs g-1 dry weight), whereas the maximum content is in brain tissue (61.8 μgAs­g-1 dry weight). Arsenic accumulated in liver tissue was present as methylated arsenic species, and no inorganic arsenic species were found in liver tissue. A notable exception is in brain tissue. Most arsenic accumulated in brain tissue was inorganic arsenic species, and no methylated arsenic was found in brain tissue. In a dietary exposure treatment, the maximum arsenic accumulation in the tissue of T. mossambica fed with Neocaridina denticulata dosed with arsenic from a Chlorella vulgaris diet (via the food chain) is in the ovary (7.4 μgAs g-1 dry weight), followed by gill, liver, muscle, bone, brain, eyes and intestine. Trace amounts of methylated arsenic were found in liver tissue in this treatment. Methylated arsenic in fish exposed via water was more evenly distributed in the organs compared with dietary exposure. Copyright © 2001 John Wiley & Sons, Ltd.

Applied Organometallic Chemistry, 1999

The freshwater green alga, Chlorella vulgaris, was cultivated in a modified Detmer medium in the ... more The freshwater green alga, Chlorella vulgaris, was cultivated in a modified Detmer medium in the presence of arsenite in order to investigate tolerance, accumulation, transformation and excretion of arsenic species. When the alga was exposed to arsenite, arsenic accumulation markedly increased in the beginning of the log phase, rose to a maximum of 610 mg As g À1 and then decreased during the period from 40 to 120 h after inoculation. Arsenate was the major metabolite in the algal cell; trimethylarsenical species (TMA) were also found 36 h after inoculation when the alga was exposed to arsenite at levels of 70-100 mg As cm À3. At arsenite levels of 10-20 mg As cm À3 , cell growth was higher than in an arsenic-free medium. Arsenite accumulated in Chlorella vulgaris was transformed to arsenate through bio-oxidation and to a small degree to methyl-, dimethyl-, and trimethyl-arsenic species through biomethylation. Furthermore, the arsenic metabolites were readily excreted under conditions undesirable for the growth of the alga. Total arsenic accumulation decreased with an increase in arsenite concentration in the medium. Copyright # 1999 John Wiley & Sons, Ltd.

Jurnal IPA & Pembelajaran IPA, 2021

Salinity is the amount of salt contained or dissolved in water or soil. Salinity can cause the ch... more Salinity is the amount of salt contained or dissolved in water or soil. Salinity can cause the change of physical characteristics of soil, especially in coastal area, that affects human daily activities, including agriculture. Baitussalam District (Kecamatan Baitussalam) is one of the districts that was hit most devastatingly by the Indian Ocean Tsunami 2004 as well as has large population with potential agricultural prospect in Aceh Besar Region (Kabupaten Aceh Besar). This research aims to identify the soil salinity level in the Baitussalam District. The sampling technique uses descriptive methodology with scalable quantitative approach in the chosen sampling areas. 26 sampling spots have been chosen according to mathematical calculation. Quantitative method is used to analyze the result in this research. Furthermore, conductivity measurement is done through induction electromagnetic method, using Geonics EM38 and to identify the soil salinity level, analysis of soil texture is co...

Jurnal IPA & Pembelajaran IPA, 2022

The research has been carried out to assess the rate of desertification of the karst ecosystem re... more The research has been carried out to assess the rate of desertification of the karst ecosystem regarding land damage in the Darul Imarah, Aceh Besar District. This study aims to determine the level of damage to the karst ecosystem and its effect on water quality and to determine the condition of land cover in the Mata Ie karst ecosystem., Aceh Besar District. The data collection method used is using Landsat 8 satellite imagery to assess the level of damage to the karst ecosystem area. The assessment of water quality and quantity was carried out by means of a direct survey in the Mata Ie karts ecosystem area by analyzing BOD, COD, TDS, Turbidity, DO, Temperature and pH. The results of the assessment of the level of damage to the kart ecosystem area of the Mata Ie area have changed. The results of the study prove that due to land clearing for plantation activities in the Mata Ie area and also as a tourist spot, the conditions in the area are not desertification, Karst area which consi...

Calotropis gigantea stems (CGS) has the potential to use as biosorbent for adsorption of Cu(II) i... more Calotropis gigantea stems (CGS) has the potential to use as biosorbent for adsorption of Cu(II) ions. In this study, the CGS biosorbent (CGSB) was prepared by drying and grounding. The effect of independent variables on adsorption capacity were investigated. As the result, the maximum adsorption capacity of 53.457 mg/g was obtained the optimal condition which was initial Cu(II) ions concentration of 567.47 mg/L, CGSB size of less than 230 mesh, CGSB mass of 1 g, temperature of 27 o C, pH 5, and contact time of 60 min. The CGSB surface morphology was analysed using SEM. The adsorption of Cu(II) ions fitted well with pseudo first-order adsorption kinetic (PFO-AK) model (R 2 =0.99), and the PFO-AK adsorption capacity and rate constant obtained were 70.194 mg/g and 0.0877 g/mg.min, respectively. The adsorption isotherm of Cu(II) ions was in accordance with Freundlich model (R 2 =0.99), and the intensity and volume constants attained were 0.876 and 1.017 L/mg, respectively. This result s...

Water quality assessment in the tsunami-affected areas conducted in Meuraxa and Kutaradja sub-dis... more Water quality assessment in the tsunami-affected areas conducted in Meuraxa and Kutaradja sub-districts in the area of Banda Aceh City. Water samples were collected in October 2006 from dug wells of tsunami-affected areas. These were characterized for various physical and chemical parameters. Water quality in the selected areas has shown that the surface water was contaminated due to the tsunami. Total Dissolved Solid, Total Suspended Solid, Acidity, and salinity were high in the affected areas indicating saline water intrusion into surface water tables. Dug wells in the highly affected locations showed higher values of heavy metal ions like Mn, Pb, Cu, Fe, Zn, and Cu compared to the reference points. No ion Hg was found in all samples. Keywords: Banda Aceh, heavy metals, tsunami, water quality

Abstract. This research was conducted to examine the growth of green microalgae in Palm Oil Mill ... more Abstract. This research was conducted to examine the growth of green microalgae in Palm Oil Mill Effluent (POME). Cultivation was done to eliminate nutrients in POME with different concentrations biomass produced by green microalgae. Results showed that the best growth of green microalgae with the highest content of biomass obtained in cultivation in media with 30% effluent concentration with 4x8 watt lighting for 8 hours. Biomass obtained from this treatment was 1.20 g-dry weight/L. Green microalgae metabolic processes proven to reduce and eliminate nutrients in POME reaches 40-100% of the concentration of COD and BOD. Based on this research, green microalgae can be used to reduce and eliminate the concentration of organic substances in POME as one of the alternative methods of waste management. Keywords: green microalgae, Palm Oil Mill Effluent (POME), nutrient, and urea.

This research focused to study the effect of phosphate (as KH 2 PO 4 ) on mercury accumulation by... more This research focused to study the effect of phosphate (as KH 2 PO 4 ) on mercury accumulation by Aquatic Plant, Thypa Latifolia. Five stems of Thypa latifolia was cultured for five weeks in water containing mercury ion (10 mg-Hg/L) in pounds under controlled condition. Kalium Dihydrogenphosphate has been added to know the effect of phosphate at different concentrations (0; 5; 10; and 15 m-moles PO 4 ) and no phosphate added in the water phase for control media. Biomass samples (shoots, stems, and leaves) from every pounds were taken for every treatment period and mercury concentration in biomass were measured by using Atomic Absorption Spectrophotometer Shimadzu AA 630 under standard procedure after digested. Results showed that the growth of Typha latifolia higher with the presence of phosphate in water phase, however the presence of phosphate could not promote better mercury accumulation from water phase. Accumulated mercury was found highest in roots than other part of plant. Th...

The aim of this research was to examine the status of water qaility of the Krueng Aceh estuary an... more The aim of this research was to examine the status of water qaility of the Krueng Aceh estuary and heavy metal content in water and sediment. Data were taken by direct measurement in the field (in situ) and in the laboratory (ex situ). Three sampling stations were determined by purposive sampling, namely; in the left bank (nearest location with TPA), right bank (nearest location to market) and middle river (middle river area often passed by fisherman boat). Heavy metal analysis was conducted using AAS (Atomic Absorption Spectrophotometer) method and water quality status determined by STORET method. Based on the research result showed that that water quality parameters that have passed the standard of PP RI No. 82 Year 2001 Group III is TDS with an average value of 3332.78 mg / L, Pb with an average value of 0.052 mg / L, and Cd with an average value of 0.015 mg / L. The quality status of Krueng Aceh estuary water is classified into a moderate polluted or class C with a score of -23....

Canna Sp. is one of the plants that can live in conditions of wetland cultivated in freshwater co... more Canna Sp. is one of the plants that can live in conditions of wetland cultivated in freshwater courses, which often serve as recipients for domestic and other sorts of wastewater. In the context of its life ability, this study deals to investigate the capacity of Canna Sp. in uptake toxic heavy metal mercury from a wetland system. Canna Sp. was cultivated in a polybag contained wastewater for a couple months to reach acclimatization. The wastewater contained mercury ions in different concentrations of 1.2; 0.96 and 0.36 mg-Hg/L. Each polybags contained five stems of Canna Sp. Control media (contain no mercury in media) were also prepared for these treatments. During 14 days of the experiment, the atmospheric air and water temperature (30+3 oC is optimum) were maintained and every five days, length of stems, concentration of mercury ion in water phase, and its tissue were analyzed. The concentration of mercury in shoots, leaves, and roots were analyzed by Atomic Absorption Spectropho...

Toxics

The purpose of this study was to investigate the toxicity and the distribution of mercury (Hg) in... more The purpose of this study was to investigate the toxicity and the distribution of mercury (Hg) in the main tissues of freshwater fish (Oreochromis niloticus) after being exposed to water containing Hg(II). A sample group of 10 fish, of mean weight 80–100 g wet weight, were exposed to different concentrations of Hg (0.0012; 0.0049; 0.0141; 0.0524; 0.1126; and 0.5110 mg-HgII/L) for 72 hours under controlled conditions using the static method in ponds. A control medium was also prepared in two replications. Mortality of fish was closely monitored, and the test was repeated three times. For the toxicity test, observations were based on behavior, mortality, and anatomical pathology. The methodology was based on the OECD guidelines for testing of chemicals and lethal concentration (LC50) and particularly using the probit method. Thus, the mean value was obtained from two replications and then further calculated by a software (MiniTab® 16 version). Prior to analysis, samples were first lyo...