ohene Apea - Academia.edu (original) (raw)
Papers by ohene Apea
통일한국, Feb 1, 2011
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
The research focused on determining whether land modification by anthropogenic activity affect me... more The research focused on determining whether land modification by anthropogenic activity affect metal distribution and mobility. Topographical studies indicated t hat trace metals are carried into the White Volta. Trace metal concentrations in the soils varied in the order Mn > Pb > Zn > Cu > Cd. Organic matter in the tailings vary linearly with the age of tailings, and trace met al concentration in Pb > Zn > Cu > Cd. ECEC and pH of the terrestrial environment are high around the community and low within the community. Organic matter was observed to have high values at abandoned extraction sites and farm lands. There were more metal bound humic substances in the solution phase (81.16%) than the solid phase of the soil (18.84%), and more humic mat ter occur in the solution phase (Accra, 78.38%; Kejetia, 85.26%; Tarkwa, 81.16%) than in the solid phase (Accra, 21.62%; Kejetia, 14.74%; Tarkwa, 19.83%) of the soil. Inorganic sorption sites in the solution phase al so ...
Bookmarks Related papers MentionsView impact
This research focused on in-vitro studies of the effect of edible fibers of Phaseolus vulgaris an... more This research focused on in-vitro studies of the effect of edible fibers of Phaseolus vulgaris and Citrus sinensis on metal nutrient absorption during digestion in humans. The assessment was initiated by simulating the digestive system. The system was a solid-solution system containing Cu, chyme, buffer (pH 2.07), and fiber maintained at 310.5 K. By varying time of interaction, chyme volume, the masses of fiber, Zn and Cu independently using batch experiments, the effect of the individual variables on Cu availability was determined. The results revealed that, edible fibers influence metal nutrient availability during digestion in humans in-vitro. In addition, soluble organic compounds participate in the reduction of metal nutrient availability. Nutrient-nutrient competition was observed to occur in the system and leads to the reduction in the availability of one nutrient relative to another. The results suggested that the hypothesis and chemical interaction models developed by Apea ...
Bookmarks Related papers MentionsView impact
The fate of metals in the soil environment is directly related to their interaction and partition... more The fate of metals in the soil environment is directly related to their interaction and partitioning behavior in terrestrial environments. The effect of background electrolyte on the partitioning of Cu under humic conditions in soil-solution system was investigated and it was observed that increasing background electrolyte pushes humic acid (HA) aggregation through stages of thermodynamic non-spontaneous phase to an equilibrium phase and finally to a spontaneous aggregation stage. At pH 4.7 HA adsorption other than aggregation influences Cu distribution. And at pH 10 both HA adsorption and aggregation are responsible. It was noted that, the effect of background electrolyte concentration on Cu distribution is as a result of its ability to induce ligand aggregation, reduce metal – ligand complexation, and initiate competition of electrolyte cation (K+) with the Cu for sorption sites in the soil. Modeling studies revealed that, metal adsorption and HA aggregation factors account for th...
Bookmarks Related papers MentionsView impact
Natural resources are a gift to any nation. The article focused on demonstrating that natural mat... more Natural resources are a gift to any nation. The article focused on demonstrating that natural materials hold the potential to generate income for any nation. The study tested the potential and efficiency of crude resins from indigenous plants in the extraction of humic substances from soil. The points of zero charge of crude resins from five plants (Anarcadiumoccidentale, Bowswellia sacra, magniferaindica, Euphorbia tiricalli, and Haveabraziliensis) were determined using potentiometric method (batch titration method). Batch experiments of resin (solid) – solution system was used to extract the humic substances. The results revealed that with the exception of Bowswellia sacra, resins from the other plants have the potential to extract humic acid and fulvic acid. Adsorption efficiency studies indicated that the plant resin with the highest efficiency of extraction (83.88%) for humic acid is Euphorbia tiricalli. And for fulvic acid the highest efficiency (77.29%) is Anarcadiumoccidenta...
Bookmarks Related papers MentionsView impact
The books discusses research methods in detail. The resesarch process has been explained in a ver... more The books discusses research methods in detail. The resesarch process has been explained in a very simple ways as to make it understandable by undergraduates. A brief treatment of relevant statistical models have been included to help an upcoming research scientist apprecciate the application of statistics to research. It is a must read book which can be used by lectureres and students.
Bookmarks Related papers MentionsView impact
In this study attempt was made to produce useful items from disposed polystyrene by modification ... more In this study attempt was made to produce useful items from disposed polystyrene by modification with heat. Heat-modified polystyrene obtained by cooling the polymer melt at 285K, 303 K, 313K, 353K, 373K and 423K, were subjected to analysis to determine their ability to transfer some of their organic composition into saliva and sweat. The extents of material transfer and kinetics of the transfer process were determined. The research revealed that polystyrene waste can be recycled by heat application into useful products. And the products can transfer some of its material (organic) composition into saliva and sweat at 37 oC. It was observed that more materials are transferred into saliva than in sweat, and at equilibrium, the difference in the amount of materials transferred is 13.16%. Bio-dissolved compounds from the heat-modified polystyrene in the body fluids increased with increase in cooling temperature. In addition, the transfer of materials from the heat-modified polymer into ...
Bookmarks Related papers MentionsView impact
The article focuses on the inter-relationship between metal distribution and characteristics of t... more The article focuses on the inter-relationship between metal distribution and characteristics of the environment in the presence of humic substances. It was observed that m ore than 81% of the total amounts of humic substances in the terrestrial environment are in solution phase. More t han half of the trace metals exist in association with hum ic acids, metal partition constants (K dm ) << 1.0 for all metals studied. Transfer of metals from so lid phase to solution phase of the terrestrial environment is more thermodynamically feasible than the reverse case. Solution phase pH, available sorption sites in the environment, and available sorpti on sites on oxide and humic matter surface for trace metals have 71.88, 65.10, 70.73, 59.02, and 69.73% cumulative effect on Co, Cu, Ni, Pb an d Zn distributions respectively. Cumulative effect of minor characteristics ac counts for 40.98% of the total effect of the characteristics of the environment on the distribution of the metals. T he...
Bookmarks Related papers MentionsView impact
Sustainable Water Resources Management, 2020
Water is an indispensable resource for human health and social well-being. However, the quality o... more Water is an indispensable resource for human health and social well-being. However, the quality of this critical resource is being threatened by both natural and anthropogenic sources. Surface and groundwater resources in the Upper East Region of Ghana are poorly managed and monitored. The water resources in this part of Ghana are contaminated with coliforms, toxic trace metals, and agrochemicals. Most of the parameters for drinking water quality are seriously being violated in various parts of the region. The major sources of surface water and groundwater pollution in the region are the dissolution of minerals, the widespread application of agrochemicals on farms, biological contamination resulting from human and animal fecal matter due to open defecation and mining activities. These have resulted in diverse health-related problems in the region since the contaminated water sources are the only drinking water supplies for rural folks. Fluoride contamination of the groundwater resources is also a major problem in the region, especially in the Bongo District and the Bolgatanga Municipality, which has resulted in cases of dental fluorosis in these parts of the region. There exists no comprehensive review on the water quality in the Upper East Region of Ghana. Therefore, this review is aimed at discussing the quality of the water resources in the region from previously published works in various parts of the region. The review highlights the major pollutants, pollution sources, and the associated health problems. Recommendations have been offered based on the findings to serve as a framework for policy-making in regard to the water resources in the region.
Bookmarks Related papers MentionsView impact
Synthetic indicators are considered costly and unfriendly to users and to the environment. Severa... more Synthetic indicators are considered costly and unfriendly to users and to the environment. Several solvents have been used for extraction and preparation of synthetic and natural indicators. These solvents have been considered toxic and can be very expensive. We have initiated a program aimed at using Sorghum bicolor red leaf extract as a natural indicator and determining the effectiveness of certain solvents in releasing the active ingredient responsible for the color change. Several mechanisms have also been reported or proposed for some natural and synthetic indicators used for simple acid-base titration. However, little is known about this natural indicator. For this present study, the natural indicator was extracted using three different organic solvents and distilled water (which is a non-toxic, universal solvent). The four solvent extracts were tested under different temperature conditions, acid-base strengths and molar strength capacities. The results indicated that all four...
Bookmarks Related papers MentionsView impact
The hypoglycemic effect of the aqueous extract of dry pawpaw leaf was investigated using albino r... more The hypoglycemic effect of the aqueous extract of dry pawpaw leaf was investigated using albino rats weighing between 141.7-257.0g. The extract tested positive for the presence of saponin glycosides, condensed tannins, alkaloids, and cardiac glycosides containing rhamnose, cymarose, and digitose sugars. Diabetic condition was induced in the rats by injecting 20mg of alloxan per 100g of body weight. The Diabetic condition was considered to have developed on the third day. Treatment of the alloxanised rats with dry pawpaw leaf extract brought down the fasting blood glucose level to 56.13%, indicating that the aqueous extract contain hypoglycemic agent. And it was predicted using a fitted linear model that within 5 days of treatment the blood sugar will return to normal. A strong relationship was noted to exist between blood sugar, and time of administration of the aqueous extract of dry pawpaw leaves. A linear model is the best fit for blood sugar and time of administration. The bioki...
Bookmarks Related papers MentionsView impact
The fate of metals in the soil environment is directly related to their interaction and partition... more The fate of metals in the soil environment is directly related to their interaction and partitioning behavior in terrestrial environments. The effect of background electrolyte on the partitioning of Cu under humic conditions in soil-solution system was investigated and it was observed that increasing background electrolyte pushes humic acid (HA) aggregation through stages of thermodynamic non-spontaneous phase to an equilibrium phase and finally to a spontaneous aggregation stage. At pH 4.7 HA adsorption other than aggregation influences Cu distribution. And at pH 10 both HA adsorption and aggregation are responsible. It was noted that, the effect of background electrolyte concentration on Cu distribution is as a result of its ability to induce ligand aggregation, reduce metal – ligand complexation, and initiate competition of electrolyte cation (K+) with the Cu for sorption sites in the soil. Modeling studies revealed that, metal adsorption and HA aggregation factors account for th...
Bookmarks Related papers MentionsView impact
The research focused on the effect of humic acid (HA) on the distribution of Cu in Cu-HA-Teak lea... more The research focused on the effect of humic acid (HA) on the distribution of Cu in Cu-HA-Teak leaf powder system. The experiment was carried out by varying the initial mass of Cu (MCu) in the system at a temperature of 310K. The experiment was carried out independently at pH 4, 6, and 10. The data obtained revealed that the concentration of copper in the solution phase of the system decreases with pH. It was also noted that a relationship exist between the initial mass of copper in the system and the extent of copper binding to the powdered leaf at all pH. And pH increased with the extent of Cu binding to the leaf powder (P). The mass of copper bound ligand (humic acid) in the solid phase was noted to vary with pH. The partition constant (KD) was observed to increase MCu. The analysis revealed that the partition constant for organic acid (KL) and KD increases with increase in pH. HA was noted to promote the transfer of Cu from solution to solid phase. The analysis suggested that the...
Bookmarks Related papers MentionsView impact
In this study attempt was made to produce useful items from disposed polystyrene by modification ... more In this study attempt was made to produce useful items from disposed polystyrene by modification with heat. Heat-modified polystyrene obtained by cooling the polymer melt at 285K, 303 K, 313K, 353K, 373K and 423K, were subjected to analysis to determine their ability to transfer some of their organic composition into saliva and sweat. The extents of material transfer and kinetics of the transfer process were determined. The research revealed that polystyrene waste can be recycled by heat application into useful products. And the products can transfer some of its material (organic) composition into saliva and sweat at 37 o C. It was observed that more materials are transferred into saliva than in sweat, and at equilibrium, the difference in the amount of materials transferred is 13.16%. Bio-dissolved compounds from the heat-modified polystyrene in the body fluids increased with increase in cooling temperature. In addition, the transfer of materials from the heat-modified polymer into...
Bookmarks Related papers MentionsView impact
Natural resources are a gift to any nation. The article focused on demonstrating that natural mat... more Natural resources are a gift to any nation. The article focused on demonstrating that natural materials hold the potential to generate income for any nation. The study tested the potential and efficiency of crude resins from indigenous plants in the extraction of humic substances from soil. The points of zero charge of crude resins from five plants (Anarcadium occidentale, Bowswellia sacra, magnifera indica, Euphorbia tiricalli, and Havea braziliensis) were determined using potentiometric method (batch titration method). Batch experiments of resin (solid) – solution system was used to extract the humic substances. The results revealed that with the exception of Bowswellia sacra, resins from the other plants have the potential to extract humic acid and fulvic acid. Adsorption efficiency studies indicated that the plant resin with the highest efficiency of extraction (83.88%) for humic acid is Euphorbia tiricalli. And for fulvic acid the highest efficiency (77.29%) is Anarcadium occid...
Bookmarks Related papers MentionsView impact
Environmental geochemistry and health, Jan 24, 2015
Environmental geochemistry classifies elements into essential, non-essential and toxic elements i... more Environmental geochemistry classifies elements into essential, non-essential and toxic elements in relationship to human health. To assess the environmental impact of mining at Datoko-Shega area, the distributions and concentrations of trace elements in stream sediments and soil samples were carried out. X-ray fluorescence analytical technique was used to measure the major and trace element concentrations in sediments and modified fire assay absorption spectrometry in soils. The results showed general depletion of major elements except titanium oxide (TiO2) compared to the average crustal concentrations. The retention of TiO2 at the near surface environment probably was due to the intense tropical weathering accompanied by the removal of fine sediments and soil fractions during the harmattan season by the dry north-east trade winds and sheet wash deposits formed after flash floods. The results also showed extreme contamination of selenium (Se), cadmium (Cd) and mercury (Hg), plus st...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Green and Sustainable Chemistry, 2012
Bookmarks Related papers MentionsView impact
American Journal of Scientific and Industrial Research, 2011
Bookmarks Related papers MentionsView impact
통일한국, Feb 1, 2011
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
The research focused on determining whether land modification by anthropogenic activity affect me... more The research focused on determining whether land modification by anthropogenic activity affect metal distribution and mobility. Topographical studies indicated t hat trace metals are carried into the White Volta. Trace metal concentrations in the soils varied in the order Mn > Pb > Zn > Cu > Cd. Organic matter in the tailings vary linearly with the age of tailings, and trace met al concentration in Pb > Zn > Cu > Cd. ECEC and pH of the terrestrial environment are high around the community and low within the community. Organic matter was observed to have high values at abandoned extraction sites and farm lands. There were more metal bound humic substances in the solution phase (81.16%) than the solid phase of the soil (18.84%), and more humic mat ter occur in the solution phase (Accra, 78.38%; Kejetia, 85.26%; Tarkwa, 81.16%) than in the solid phase (Accra, 21.62%; Kejetia, 14.74%; Tarkwa, 19.83%) of the soil. Inorganic sorption sites in the solution phase al so ...
Bookmarks Related papers MentionsView impact
This research focused on in-vitro studies of the effect of edible fibers of Phaseolus vulgaris an... more This research focused on in-vitro studies of the effect of edible fibers of Phaseolus vulgaris and Citrus sinensis on metal nutrient absorption during digestion in humans. The assessment was initiated by simulating the digestive system. The system was a solid-solution system containing Cu, chyme, buffer (pH 2.07), and fiber maintained at 310.5 K. By varying time of interaction, chyme volume, the masses of fiber, Zn and Cu independently using batch experiments, the effect of the individual variables on Cu availability was determined. The results revealed that, edible fibers influence metal nutrient availability during digestion in humans in-vitro. In addition, soluble organic compounds participate in the reduction of metal nutrient availability. Nutrient-nutrient competition was observed to occur in the system and leads to the reduction in the availability of one nutrient relative to another. The results suggested that the hypothesis and chemical interaction models developed by Apea ...
Bookmarks Related papers MentionsView impact
The fate of metals in the soil environment is directly related to their interaction and partition... more The fate of metals in the soil environment is directly related to their interaction and partitioning behavior in terrestrial environments. The effect of background electrolyte on the partitioning of Cu under humic conditions in soil-solution system was investigated and it was observed that increasing background electrolyte pushes humic acid (HA) aggregation through stages of thermodynamic non-spontaneous phase to an equilibrium phase and finally to a spontaneous aggregation stage. At pH 4.7 HA adsorption other than aggregation influences Cu distribution. And at pH 10 both HA adsorption and aggregation are responsible. It was noted that, the effect of background electrolyte concentration on Cu distribution is as a result of its ability to induce ligand aggregation, reduce metal – ligand complexation, and initiate competition of electrolyte cation (K+) with the Cu for sorption sites in the soil. Modeling studies revealed that, metal adsorption and HA aggregation factors account for th...
Bookmarks Related papers MentionsView impact
Natural resources are a gift to any nation. The article focused on demonstrating that natural mat... more Natural resources are a gift to any nation. The article focused on demonstrating that natural materials hold the potential to generate income for any nation. The study tested the potential and efficiency of crude resins from indigenous plants in the extraction of humic substances from soil. The points of zero charge of crude resins from five plants (Anarcadiumoccidentale, Bowswellia sacra, magniferaindica, Euphorbia tiricalli, and Haveabraziliensis) were determined using potentiometric method (batch titration method). Batch experiments of resin (solid) – solution system was used to extract the humic substances. The results revealed that with the exception of Bowswellia sacra, resins from the other plants have the potential to extract humic acid and fulvic acid. Adsorption efficiency studies indicated that the plant resin with the highest efficiency of extraction (83.88%) for humic acid is Euphorbia tiricalli. And for fulvic acid the highest efficiency (77.29%) is Anarcadiumoccidenta...
Bookmarks Related papers MentionsView impact
The books discusses research methods in detail. The resesarch process has been explained in a ver... more The books discusses research methods in detail. The resesarch process has been explained in a very simple ways as to make it understandable by undergraduates. A brief treatment of relevant statistical models have been included to help an upcoming research scientist apprecciate the application of statistics to research. It is a must read book which can be used by lectureres and students.
Bookmarks Related papers MentionsView impact
In this study attempt was made to produce useful items from disposed polystyrene by modification ... more In this study attempt was made to produce useful items from disposed polystyrene by modification with heat. Heat-modified polystyrene obtained by cooling the polymer melt at 285K, 303 K, 313K, 353K, 373K and 423K, were subjected to analysis to determine their ability to transfer some of their organic composition into saliva and sweat. The extents of material transfer and kinetics of the transfer process were determined. The research revealed that polystyrene waste can be recycled by heat application into useful products. And the products can transfer some of its material (organic) composition into saliva and sweat at 37 oC. It was observed that more materials are transferred into saliva than in sweat, and at equilibrium, the difference in the amount of materials transferred is 13.16%. Bio-dissolved compounds from the heat-modified polystyrene in the body fluids increased with increase in cooling temperature. In addition, the transfer of materials from the heat-modified polymer into ...
Bookmarks Related papers MentionsView impact
The article focuses on the inter-relationship between metal distribution and characteristics of t... more The article focuses on the inter-relationship between metal distribution and characteristics of the environment in the presence of humic substances. It was observed that m ore than 81% of the total amounts of humic substances in the terrestrial environment are in solution phase. More t han half of the trace metals exist in association with hum ic acids, metal partition constants (K dm ) << 1.0 for all metals studied. Transfer of metals from so lid phase to solution phase of the terrestrial environment is more thermodynamically feasible than the reverse case. Solution phase pH, available sorption sites in the environment, and available sorpti on sites on oxide and humic matter surface for trace metals have 71.88, 65.10, 70.73, 59.02, and 69.73% cumulative effect on Co, Cu, Ni, Pb an d Zn distributions respectively. Cumulative effect of minor characteristics ac counts for 40.98% of the total effect of the characteristics of the environment on the distribution of the metals. T he...
Bookmarks Related papers MentionsView impact
Sustainable Water Resources Management, 2020
Water is an indispensable resource for human health and social well-being. However, the quality o... more Water is an indispensable resource for human health and social well-being. However, the quality of this critical resource is being threatened by both natural and anthropogenic sources. Surface and groundwater resources in the Upper East Region of Ghana are poorly managed and monitored. The water resources in this part of Ghana are contaminated with coliforms, toxic trace metals, and agrochemicals. Most of the parameters for drinking water quality are seriously being violated in various parts of the region. The major sources of surface water and groundwater pollution in the region are the dissolution of minerals, the widespread application of agrochemicals on farms, biological contamination resulting from human and animal fecal matter due to open defecation and mining activities. These have resulted in diverse health-related problems in the region since the contaminated water sources are the only drinking water supplies for rural folks. Fluoride contamination of the groundwater resources is also a major problem in the region, especially in the Bongo District and the Bolgatanga Municipality, which has resulted in cases of dental fluorosis in these parts of the region. There exists no comprehensive review on the water quality in the Upper East Region of Ghana. Therefore, this review is aimed at discussing the quality of the water resources in the region from previously published works in various parts of the region. The review highlights the major pollutants, pollution sources, and the associated health problems. Recommendations have been offered based on the findings to serve as a framework for policy-making in regard to the water resources in the region.
Bookmarks Related papers MentionsView impact
Synthetic indicators are considered costly and unfriendly to users and to the environment. Severa... more Synthetic indicators are considered costly and unfriendly to users and to the environment. Several solvents have been used for extraction and preparation of synthetic and natural indicators. These solvents have been considered toxic and can be very expensive. We have initiated a program aimed at using Sorghum bicolor red leaf extract as a natural indicator and determining the effectiveness of certain solvents in releasing the active ingredient responsible for the color change. Several mechanisms have also been reported or proposed for some natural and synthetic indicators used for simple acid-base titration. However, little is known about this natural indicator. For this present study, the natural indicator was extracted using three different organic solvents and distilled water (which is a non-toxic, universal solvent). The four solvent extracts were tested under different temperature conditions, acid-base strengths and molar strength capacities. The results indicated that all four...
Bookmarks Related papers MentionsView impact
The hypoglycemic effect of the aqueous extract of dry pawpaw leaf was investigated using albino r... more The hypoglycemic effect of the aqueous extract of dry pawpaw leaf was investigated using albino rats weighing between 141.7-257.0g. The extract tested positive for the presence of saponin glycosides, condensed tannins, alkaloids, and cardiac glycosides containing rhamnose, cymarose, and digitose sugars. Diabetic condition was induced in the rats by injecting 20mg of alloxan per 100g of body weight. The Diabetic condition was considered to have developed on the third day. Treatment of the alloxanised rats with dry pawpaw leaf extract brought down the fasting blood glucose level to 56.13%, indicating that the aqueous extract contain hypoglycemic agent. And it was predicted using a fitted linear model that within 5 days of treatment the blood sugar will return to normal. A strong relationship was noted to exist between blood sugar, and time of administration of the aqueous extract of dry pawpaw leaves. A linear model is the best fit for blood sugar and time of administration. The bioki...
Bookmarks Related papers MentionsView impact
The fate of metals in the soil environment is directly related to their interaction and partition... more The fate of metals in the soil environment is directly related to their interaction and partitioning behavior in terrestrial environments. The effect of background electrolyte on the partitioning of Cu under humic conditions in soil-solution system was investigated and it was observed that increasing background electrolyte pushes humic acid (HA) aggregation through stages of thermodynamic non-spontaneous phase to an equilibrium phase and finally to a spontaneous aggregation stage. At pH 4.7 HA adsorption other than aggregation influences Cu distribution. And at pH 10 both HA adsorption and aggregation are responsible. It was noted that, the effect of background electrolyte concentration on Cu distribution is as a result of its ability to induce ligand aggregation, reduce metal – ligand complexation, and initiate competition of electrolyte cation (K+) with the Cu for sorption sites in the soil. Modeling studies revealed that, metal adsorption and HA aggregation factors account for th...
Bookmarks Related papers MentionsView impact
The research focused on the effect of humic acid (HA) on the distribution of Cu in Cu-HA-Teak lea... more The research focused on the effect of humic acid (HA) on the distribution of Cu in Cu-HA-Teak leaf powder system. The experiment was carried out by varying the initial mass of Cu (MCu) in the system at a temperature of 310K. The experiment was carried out independently at pH 4, 6, and 10. The data obtained revealed that the concentration of copper in the solution phase of the system decreases with pH. It was also noted that a relationship exist between the initial mass of copper in the system and the extent of copper binding to the powdered leaf at all pH. And pH increased with the extent of Cu binding to the leaf powder (P). The mass of copper bound ligand (humic acid) in the solid phase was noted to vary with pH. The partition constant (KD) was observed to increase MCu. The analysis revealed that the partition constant for organic acid (KL) and KD increases with increase in pH. HA was noted to promote the transfer of Cu from solution to solid phase. The analysis suggested that the...
Bookmarks Related papers MentionsView impact
In this study attempt was made to produce useful items from disposed polystyrene by modification ... more In this study attempt was made to produce useful items from disposed polystyrene by modification with heat. Heat-modified polystyrene obtained by cooling the polymer melt at 285K, 303 K, 313K, 353K, 373K and 423K, were subjected to analysis to determine their ability to transfer some of their organic composition into saliva and sweat. The extents of material transfer and kinetics of the transfer process were determined. The research revealed that polystyrene waste can be recycled by heat application into useful products. And the products can transfer some of its material (organic) composition into saliva and sweat at 37 o C. It was observed that more materials are transferred into saliva than in sweat, and at equilibrium, the difference in the amount of materials transferred is 13.16%. Bio-dissolved compounds from the heat-modified polystyrene in the body fluids increased with increase in cooling temperature. In addition, the transfer of materials from the heat-modified polymer into...
Bookmarks Related papers MentionsView impact
Natural resources are a gift to any nation. The article focused on demonstrating that natural mat... more Natural resources are a gift to any nation. The article focused on demonstrating that natural materials hold the potential to generate income for any nation. The study tested the potential and efficiency of crude resins from indigenous plants in the extraction of humic substances from soil. The points of zero charge of crude resins from five plants (Anarcadium occidentale, Bowswellia sacra, magnifera indica, Euphorbia tiricalli, and Havea braziliensis) were determined using potentiometric method (batch titration method). Batch experiments of resin (solid) – solution system was used to extract the humic substances. The results revealed that with the exception of Bowswellia sacra, resins from the other plants have the potential to extract humic acid and fulvic acid. Adsorption efficiency studies indicated that the plant resin with the highest efficiency of extraction (83.88%) for humic acid is Euphorbia tiricalli. And for fulvic acid the highest efficiency (77.29%) is Anarcadium occid...
Bookmarks Related papers MentionsView impact
Environmental geochemistry and health, Jan 24, 2015
Environmental geochemistry classifies elements into essential, non-essential and toxic elements i... more Environmental geochemistry classifies elements into essential, non-essential and toxic elements in relationship to human health. To assess the environmental impact of mining at Datoko-Shega area, the distributions and concentrations of trace elements in stream sediments and soil samples were carried out. X-ray fluorescence analytical technique was used to measure the major and trace element concentrations in sediments and modified fire assay absorption spectrometry in soils. The results showed general depletion of major elements except titanium oxide (TiO2) compared to the average crustal concentrations. The retention of TiO2 at the near surface environment probably was due to the intense tropical weathering accompanied by the removal of fine sediments and soil fractions during the harmattan season by the dry north-east trade winds and sheet wash deposits formed after flash floods. The results also showed extreme contamination of selenium (Se), cadmium (Cd) and mercury (Hg), plus st...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Green and Sustainable Chemistry, 2012
Bookmarks Related papers MentionsView impact
American Journal of Scientific and Industrial Research, 2011
Bookmarks Related papers MentionsView impact