Reza Sharifi - Academia.edu (original) (raw)

Papers by Reza Sharifi

This study investigated distributions, composition patterns, sources and potential toxicity of po... more This study investigated distributions, composition patterns, sources and potential toxicity of polycyclic aromatic hydrocarbon (PAHs) pollution in surface sediments from the Kim Kim River and Segget River, Peninsular Malaysia. The samples were extracted using Soxhlet extraction, purified using two-step silica gel column chromatography and then analysed by gas chromatography mass spectrometry (GC-MS). The total PAH concentrations ranged from 95.17 to 361.24 ng g-1 dry weight (dw) and 330.09 to 552.76 ng g-1 dw in surface sediments from the Kim Kim and Segget Rivers, respectively. Source type identification using PAH molecular indices and hierarchical cluster analysis (HCA) indicated that PAHs were mostly of pyrogenic origin, while in some stations petrogenic sources had a significant portion. A PAH toxicity assessment using sediment quality guidelines (SQGs), mean effect range-median quotient (M-ERM-Q), benzo[a]pyrene (BaP) equivalent concentration and BaP toxicity equivalent quotien...

Building and Environment, 2021

Exposure and Health, 2017

Thirty-three soil and twenty-six crop samples were collected and analyzed from geogenic arsenic (... more Thirty-three soil and twenty-six crop samples were collected and analyzed from geogenic arsenic (As)contaminated lands at rural areas of Bijar Township, Kurdistan Province, Iran. The data were used to determine several parameters to evaluate human health risk, including bioaccumulation factor from soil to plant, chronic daily intake dose, incremental lifetime cancer risk (ILTCR), and hazard quotient. The results showed that average As concentration in soil samples is far beyond the limiting values recommended by the European Community (20 mg kg −1), and also positive correlation found between total As content and bioavailable fraction of As in soil samples. X-ray diffractometry (XRD) revealed crystallized As phases such as Arsenolite (As 2 O 3), Claudetite (As 2 O 3), and Kankite (FeAsO 4 •3.5H 2 O) in calcareous soil samples. Pollution rates were evaluated using single-factor pollution index and Nemerow multifactor index. The highest As contents were found in root and tuber crop plants (121.6 mg/kg) and leafy vegetables (52 mg/kg). The ILTCR values for As indicated a maximal potential cancer risk through ingestion of vegetables. In addition, root and tuber crops exhibited higher than 1 hazard quotient values for adults (up to 73) and children (up to 120) signifying the fact that exposed adults and children are potentially at risk of health effects including cancer with the children being more susceptible.

Journal of African Earth Sciences, 2017

Highlights  The soils of the study area are highly contaminated with As, Cd, Cu, Pb and Zn.  Co... more Highlights  The soils of the study area are highly contaminated with As, Cd, Cu, Pb and Zn.  Co, Cr and Ni are mostly geogenic in the soils of the study area.  Mining, steel industry, municipal waste dumps and traffic are the main sources of soil pollution.  Exposure to soils contaminated with Cd and Pb poses high cancer risk for local inhabitants.

Environmental Geochemistry and Health, 2017

Surface sediment samples were collected from intertidal zone of Asaluyeh, Persian Gulf, to invest... more Surface sediment samples were collected from intertidal zone of Asaluyeh, Persian Gulf, to investigate distribution, sources and health risk of sixteen polycyclic aromatic hydrocarbons (PAHs). Total PAH concentrations ranged from 1.8 to 81.2 μg kg−1 dry weight, which can be categorized as low level of pollution. Qualitative and quantitative assessments showed that PAHs originated from both petrogenic and pyrogenic sources with slight pyrogenic dominance. Source apportionment using principal component analysis indicated that the main sources of PAHs were fossil fuel combustion (33.59%), traffic-related PAHs (32.77%), biomass and coal combustion (18.54%) and petrogenic PAHs (9.31%). According to the results from the sediment quality guidelines, mean effects range-median quotient (M-ERM-Q) and benzo[a]pyrene toxic equivalents (BaPeq), low negative ecological risks related to PAH compounds would occur in the intertidal zone of Asaluyeh. The total benzo[a]pyrene (BaP) toxic equivalent quotient (TEQcarc) for carcinogenic compounds ranged from 0.01 to 7 μg kg−1-BaPeq, indicating low carcinogenic risk. The human health risk assessment of PAH compounds via ingestion and dermal pathways suggests low and moderate potential risk to human health, respectively.

Archives of environmental contamination and toxicology, Jan 11, 2017

The distribution, sources, and human health risk assessment of polycyclic aromatic hydrocarbons (... more The distribution, sources, and human health risk assessment of polycyclic aromatic hydrocarbons (PAHs) in surface sediment and the edible tissue of short-neck clam (Paphia undulata) from mudflat ecosystem in the west coast of Malaysia were investigated. The concentrations of ∑16 PAHs varied from 347.05 to 6207.5 and 179.32 to 1657.5 ng g(-1) in sediment and short-neck clam samples, respectively. The calculations of mean PEL quotients (mean-PELQs) showed that the ecological risk of PAHs in the sediment samples was low to moderate-high level, whereas the total health risk through ingestion and dermal contact was considerably high. The PAHs biota sediment accumulation factors data for short-neck clam were obtained in this study, indicating a preferential accumulation of lower molecular weight PAHs. The source apportionment of PAHs in sediment using positive matrix factorization model indicated that the highest contribution to the PAHs was from diesel emissions (30.38%) followed by oil ...

Journal of Environmental Management, 2016

Arsenic (As) and antimony (Sb) concentrations in water and sediments were determined along flow p... more Arsenic (As) and antimony (Sb) concentrations in water and sediments were determined along flow paths in the Sarouq River, Zarshuran and Agh Darreh streams. The results indicate high As and Sb concentrations in water and sediment samples. Raman spectroscopy shows hematite (a-Fe 2 O 3), goethite [a-FeO(OH)] and lepidocrocite [g-FeO(OH)] in sediment samples. Calculated saturation indices (SI) indicate oversaturation with respect to amorphous Fe(OH) 3 for all samples, but undersaturation with respect to Al and Mn mineral and amorphous phases. Therefore, ferric oxides and hydroxides are assumed to be principal mineral phases for arsenic and antimony attenuation by adsorption/coprecipitation processes. The considerable difference between As and Sb concentration in sediment is due to strong adsorption of As(V) into the solid phase. Also, lower affinity of Sb(V) for mineral surfaces suggests a greater potential for aqueous transport. The adsorption of arsenic and antimony was examined using the Freundlich adsorption isotherm to determine their distribution model in water-sediment system and its compatibility with the existing theoretical model. The results showed that the adsorption behavior of both elements complies with the Freundlich adsorption isotherm.

Arsenic in the Environment - Proceedings, 2014

Environmental Monitoring and Assessment, 2016

Chemical analyses of water samples from 19 hot and cold springs are used to characterize Takab ge... more Chemical analyses of water samples from 19 hot and cold springs are used to characterize Takab geothermal field, west of Iran. The springs are divided into two main groups based on temperature, host rock, total dissolved solids (TDS), and major and minor elements. TDS, electrical conductivity (EC), Cl − , and SO 4 2 − concentrations of hot springs are all higher than in cold springs. Higher TDS in hot springs probably reflect longer circulation and residence time. The high Si, B, and Sr contents in thermal waters are probably the result of extended water-rock interaction and reflect flow paths and residence time. Binary, ternary, and Giggenbach diagrams were used to understand the deeper mixing conditions and locations of springs in the model system. It is believed that the springs are heated either by mixing of deep geothermal fluid with cold groundwater or low conductive heat flow. Mixing ratios are evaluated using Cl, Na, and B concentrations and a mass balance approach. Calculated quartz and chalcedony geothermometer give lower reservoir temperatures than cation geothermometers. The silica-enthalpy mixing model predicts a subsurface reservoir temperature between 62 and 90°C. The δ 18 O and δD (δ 2 H) are used to trace and determine the origin and movement of water. Both hot and cold waters plot close to the local meteoric line, indicating local meteoric origin.

Water Quality, Exposure and Health, 2014

ABSTRACT Darrehzar porphyry copper mine is located 10 km south of the famous Sarcheshmeh porphyry... more ABSTRACT Darrehzar porphyry copper mine is located 10 km south of the famous Sarcheshmeh porphyry copper mine in Kerman province, Iran. Water and sediment samples in the Darrehzar porphyry copper mine were collected and analyzed in order to characterize the environmental effects of regional geology and mining activity. Stream affected by acid mine drainage (AMD) are Ca-SO42- in type, while unaffected streams are Ca-HCO3- type. Acid drainage, with pH values as low as 2.5, is quite rich in dissolved copper (mean 306.53 mg/L) > iron (77.83 mg/L) > aluminium (48.62 mg/L) > manganese (6.90 mg/L) > zinc (2810.42 mu g/L) > cobalt (831.55 mu g/L) > nickel (298.47 mu g/L). The high sulfate concentration makes sulfate the major controlling factor of electrical conductivity. The strong correlation among the majority of the elements indicates either similar geochemical behavior or a common origin, (mostly sulfides). Calculation of Acid Mine Drainage Index (AMDI) indicates that Darrehzar mine is classified as dangerous in view of AMD hazards. In Darrehzar porphyry copper mine, total rare earth element content (Sigma REE) in AMD (5.54-417.76 mu g L-1) is higher than natural water (REE in upstream and downstream water is 0.87-1.40 and 0.83-1.71 mu g L-1 respectively). The North American Shale Composite (NASC) normalized REE patterns of AMDs revealed strong enrichment of middle REE (MREE), and heavy REE (HREE) compared with light REE (LREE). Speciation modeling indicates the predominance of aqueous species i.e., LnSO(4)(+), Ln(SO4)(2)(-), Ln(3+), LnCO(3)(+), LnHCO(3)(2+) and Ln(CO3)(2)(-) (Ln refers to any lanthanide element). In upstream, where pH is 7.2 <= pH, REEs primarily exist as LnCO(3)(+), and HREE bicarbonate complexes (Ln (CO3)(2)(-)) exceed those of LREEs. Based on mean geoaccumulation indices (Igeo), Darrehzar river sediments at mine site display the following trend: Cu > Mo > Pb > Sb > Cd. Calculated potential ecological risk index (RI) indicates higher risk at mine site. The mean potential ecological risk factors (Ei) for sediment metals display the following trend: Mo > Cd > Cu > As > hbox Pb > Ni > Cr > Zn.

International Journal of Environmental Studies, 2014

ABSTRACT This study investigates the bioavailability, water–soil to plant transfer and health ris... more ABSTRACT This study investigates the bioavailability, water–soil to plant transfer and health risks of arsenic (As), antimony (Sb) and mercury (Hg) in the Takab geothermal field north-west of Iran. Water used for irrigation, surface soils from agricultural lands and cultivated plants were collected from three polluted sites and analysed for As, Sb and Hg to assess associated health risks. As content in irrigation water ranges from 23.4 to 986.4 μg/L, whereas total As content in the surface soil is in the range of 16.3–492 mg/kg−1. The results agree with other reports that metal (loid) concentrations in leaves are usually much higher than in grain. Most investigated plant species showed a significant correlation between As, Sb and Hg contents in their aerial parts and that available in the soil (r = 0.82, p = 0.012; r = 0.84, p = 0.004; r = 0.79, p = 0.011). Factors influencing the bioavailability of metal (loids) and their occurrences in plants are soil pH, cation exchange capacity, phosphate, calcite and organic matter content, soil texture and interaction between target elements. Available As in analysed soils is relatively low, implying that phosphate, as well as Fe-oxy-hydroxides and calcite are effective in absorbing As. But, sequential extraction analysis indicates that iron oxy-hydroxide surface can bind both As and Sb, with As being more strongly bound. The calculated bioaccumulation factor based on total metal (loids) and available metal (loids) in soil indicates that alfalfa (Medicago sativa L.) and sage (Saliva syriaca L.) are effective accumulators of As, Sb and Hg. The health risk index of the studied plants ranged from 0.0003 to 5.71, with the maximum being in wheat (Triticun aestivum L.), an alarming sign for human health. It is suggested that health risks from long-term consumption of wheat and other As-rich foodstuffs must be managed by monitoring contamination in the water–soil–plant pathway.

International Journal of Environmental Studies, 2013

ABSTRACT The Sar Cheshmeh copper mine, located in the Urumieh-Dokhtar volcanic belt, is one of th... more ABSTRACT The Sar Cheshmeh copper mine, located in the Urumieh-Dokhtar volcanic belt, is one of the largest porphyry copper deposits in Iran. This study examines transport and sediment-water partitioning of trace metals (Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sb, Sn, Zn) in acid mine drainage (AMD) and water–sediment system. It is shown that waste dumps and tailings dam are major causes of AMD generation. An elevated level of heavy metals viz. Mo, Mn, Pb, Cr, Cd, Fe, Cu and base metals like Na, K in AMD-impacted water and sediments results from the metal leaching effect of AMD. Factor analysis identified three factors responsible for data structure explaining 86.07% of total variance in water samples. The distribution coefficient (K d) values vary from 1.1 Â 10 6 for Fe to 5.1 Â 10 3 for Mn and increases in the sequence of Fe > Pb ≈ Al > Mo ≈ Sb > As > Cr > Sn > Cu > Ni ≈ Zn > Co ≈ Cd > Mn. The results of sequential extraction analysis indi-cate that among non-residual fractions, Fe–Mn oxides are most important for retaining trace metals in the sediments. Calculation of mobility factor (MF) shows that in the Sar Cheshmeh copper mine, the heavy metal MFs display the following decreasing trend: Cd > Mn > Co > Zn > Cu > Ni > Cr > Sb > Al > As > Sn > Pb > Mo > Fe.

Geochemistry, 2013

ABSTRACT Acid mine drainage is a major source of water pollution in the Sarcheshmeh porphyry copp... more ABSTRACT Acid mine drainage is a major source of water pollution in the Sarcheshmeh porphyry copper mine area. The concentrations of heavy metals and rare earth elements (REEs) in the host rocks, natural waters and acid mine drainage (AMD) associated with mining and tailing impoundments are determined. Contrary to the solid samples, AMDs and impacted stream waters are enriched in middle rare earth elements (MREEs) and heavy rare earth elements (HREEs) relative to light rare earth elements (LREEs). This behavior suggests that REE probably fractionate during sulfide oxidation and acid generation and subsequent transport, so that MREE and HREE are preferentially enriched. Speciation modeling predict that the dominant dissolved REE inorganic species are Ln3+, Ln(SO4)2−, LnSO4 +, LnHCO3 2+, Ln(CO3)2 − and LnCO3 +. Compared to natural waters, Sarcheshmeh AMD is enriched in REEs and SO42−. High concentrations of SO42− lead to the formation of stable LnSO4+, thereby resulting in higher concentrations of REEs in AMD samples. The model indicates that LnSO4+ is the dissolved form of REE in acid waters, while carbonate and dicarbonate complexes are the most abundant dissolved REE species in alkaline waters. The speciation calculations indicate that other factors besides complexation of the REE’s, such as release of MREE from dissolution and/or desorption processes in soluble salts and poorly crystalline iron oxyhydroxy sulfates as well as dissolution of host rock MREE-bearing minerals control the dissolved REE concentrations and, hence, the MREE-enriched patterns of acid mine waters.

EGU General Assembly 2010, held 2-7 …, 2010

The study area is located 60 km Southwest of Yazd city, between Central Iranian Zone and Orumieh-... more The study area is located 60 km Southwest of Yazd city, between Central Iranian Zone and Orumieh-Dokhtar tectonomagmatic belt. Skarn-type metasomatic alteration and mineralization in the Mohammad-Abad district occurs along the contact between Jamal ...

The Panah-koh Cu-Fe-Au vein deposit, located 60 km south west of Yazd Province, between Central I... more The Panah-koh Cu-Fe-Au vein deposit, located 60 km south west of Yazd Province, between Central Iranian Zone and Orumieh-Dokhtar tectnomagmatic belt. The vains result from hydrothermal processes related to a Neogenes volcanism which produced a dacitic to rhyodacitic dome which responsible for most of the altration and mineralization in this area. mineralization occurs in a series of NW-SW trending fault planes and breccia zones in (Early Combrian) and sand stone (Percambrian) rocks. the main ore minerals are Chalcopyrite,

Geochemistry, 2019

In this research, we have worked on the evaluation of heavy metal contamination in the sediments ... more In this research, we have worked on the evaluation of heavy metal contamination in the sediments taken from the intertidal zone of Asaluyeh region using Modified Community Bureau of Reference
sequential extraction method (mBCR), the simplified bioaccessibility extraction test (SBET), and calculated enrichment factor (EF). Also, potential influencing factors including sediment characteristics that may affect the heavy metals bioavailability and bioaccessibility were investigated. mBCR extraction analysis indicated that among the metals, Mn, Zn, V, Cu, and Cd exhibit relatively higher mobility, while Ti, Pb, Cr, and Ni occur mainly in the residual fractions. Based on the mean values, the bioaccessibility of metals decreased in the order: Mn
(50.01%) > Cd (46.26%) > Zn (14.61%) > V (13.97%) > Pb (10.88%) > Ni (9.2%) > Ti (8.43%) > Cr (6.66%) > Cu (6.23%). The obtained results from the principal component analysis (PCA), EF and mBCR extraction showed that most anthropogenic-derived metals with higher solubility are more bioaccessible compared to those of natural origin. Multiple linear regression analysis demonstrated that the main physicochemical variables of the sediment influencing the bioaccessibility of metals include cation exchange capacity (CEC), pH, and particle size fraction.