The Experts below are selected from a list of 9138 Experts worldwide ranked by ideXlab platform
L Zhao - One of the best experts on this subject based on the ideXlab platform.
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source identification and health risk assessment of metals in urban soils around the tanggu chemical Industrial District tianjin china
Science of The Total Environment, 2014Co-Authors: L Zhao, Yafei Xu, Yuxian Shangguan, Fasheng LiAbstract:Abstract We conducted an investigation to identify the sources of metals in urban surface soils, and to assess the associated human health risks, around the Tanggu chemical Industrial District, Tianjin, China. The metal concentrations and spatial distributions in 70 soil samples from the study area were determined. Pollution sources were identified using multivariate statistical analysis. They mainly attributed Cu, Pb, and Zn pollution to vehicular traffic and Industrial discharges, Cd pollution to Industrial activities and anthropogenic waste including Industrial discharges, sewage sludge, and municipal solid waste, As and Hg pollution to coal combustion and point source emissions from the chemical industry, and Cr and Ni pollution to the soil parent material. Soil properties, particularly the organic matter content, were found to be important factors in the distribution and composition of metals. A health risk assessment showed that samples from the northwestern and southeastern parts of the study area may pose significant health risks to the population.
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organochlorine pesticides and polychlorinated biphenyls in soils surrounding the tanggu chemical Industrial District of tianjin china
Environmental Science and Pollution Research, 2013Co-Authors: L Zhao, J Zhang, Y F Xu, F S LiAbstract:The spatial distribution of persistent organic pollutants (POPs) was examined in soils surrounding the Tanggu Chemical Industrial District in Tianjin, China. The concentrations of hexachlorocyclohexanes (HCHs), dichlorodiphenyltrichloroethanes (DDTs), hexachlorobenzenes (HCBs), and polychlorinated biphenyls (PCBs) were determined in 70 surface soils using accelerated solvent extraction and gas chromatography with electron capture detection. The results showed that the ranges of ∑HCH, ∑DDT, ΣHCB, and ∑PCB concentrations in soils were 2.1–12,549 μg kg−1 (average, 965 μg kg−1), n.d.–2,033 μg kg−1 (average, 88.4 μg kg−1), n.d.–1,924 μg kg−1 (average, 349 μg kg−1), and n.d.–373 μg kg−1 (average, 46.2 μg kg−1), respectively. Of these, HCHs were the dominant POPs, accounting for 75 % of the total organochlorine pesticide (OCP) residues. Overall, the spatial distribution of OCP concentrations showed a decreasing trend from the center of the Tanggu District to the surrounding areas. Two major pollution sources were Tianjin Dagu Chemical Co., Ltd. in the District center and the Tianjin Chemical Plant in Hangu District. In contrast, PCB concentrations were relatively high in the Haihe estuary to the east and low to the west of the study area. Component analysis of OCPs in these soils showed that they mainly came from Industrial point sources. Compared with soils in other regions, soil DDT pollution was at a medium level in the Tanggu Chemical Industrial District, but associated HCH, HCB, and PCB pollution was relatively heavy. By multivariate statistical analyses, Tianjin Dagu Chemical Co., Ltd. was recognized as the main source of POPs, and soil properties were clarified to play an important role on the distribution and composition of POPs, especially the organic carbon content.
Fasheng Li - One of the best experts on this subject based on the ideXlab platform.
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source identification and health risk assessment of metals in urban soils around the tanggu chemical Industrial District tianjin china
Science of The Total Environment, 2014Co-Authors: L Zhao, Yafei Xu, Yuxian Shangguan, Fasheng LiAbstract:Abstract We conducted an investigation to identify the sources of metals in urban surface soils, and to assess the associated human health risks, around the Tanggu chemical Industrial District, Tianjin, China. The metal concentrations and spatial distributions in 70 soil samples from the study area were determined. Pollution sources were identified using multivariate statistical analysis. They mainly attributed Cu, Pb, and Zn pollution to vehicular traffic and Industrial discharges, Cd pollution to Industrial activities and anthropogenic waste including Industrial discharges, sewage sludge, and municipal solid waste, As and Hg pollution to coal combustion and point source emissions from the chemical industry, and Cr and Ni pollution to the soil parent material. Soil properties, particularly the organic matter content, were found to be important factors in the distribution and composition of metals. A health risk assessment showed that samples from the northwestern and southeastern parts of the study area may pose significant health risks to the population.
F S Li - One of the best experts on this subject based on the ideXlab platform.
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organochlorine pesticides and polychlorinated biphenyls in soils surrounding the tanggu chemical Industrial District of tianjin china
Environmental Science and Pollution Research, 2013Co-Authors: L Zhao, J Zhang, Y F Xu, F S LiAbstract:The spatial distribution of persistent organic pollutants (POPs) was examined in soils surrounding the Tanggu Chemical Industrial District in Tianjin, China. The concentrations of hexachlorocyclohexanes (HCHs), dichlorodiphenyltrichloroethanes (DDTs), hexachlorobenzenes (HCBs), and polychlorinated biphenyls (PCBs) were determined in 70 surface soils using accelerated solvent extraction and gas chromatography with electron capture detection. The results showed that the ranges of ∑HCH, ∑DDT, ΣHCB, and ∑PCB concentrations in soils were 2.1–12,549 μg kg−1 (average, 965 μg kg−1), n.d.–2,033 μg kg−1 (average, 88.4 μg kg−1), n.d.–1,924 μg kg−1 (average, 349 μg kg−1), and n.d.–373 μg kg−1 (average, 46.2 μg kg−1), respectively. Of these, HCHs were the dominant POPs, accounting for 75 % of the total organochlorine pesticide (OCP) residues. Overall, the spatial distribution of OCP concentrations showed a decreasing trend from the center of the Tanggu District to the surrounding areas. Two major pollution sources were Tianjin Dagu Chemical Co., Ltd. in the District center and the Tianjin Chemical Plant in Hangu District. In contrast, PCB concentrations were relatively high in the Haihe estuary to the east and low to the west of the study area. Component analysis of OCPs in these soils showed that they mainly came from Industrial point sources. Compared with soils in other regions, soil DDT pollution was at a medium level in the Tanggu Chemical Industrial District, but associated HCH, HCB, and PCB pollution was relatively heavy. By multivariate statistical analyses, Tianjin Dagu Chemical Co., Ltd. was recognized as the main source of POPs, and soil properties were clarified to play an important role on the distribution and composition of POPs, especially the organic carbon content.
Yuxian Shangguan - One of the best experts on this subject based on the ideXlab platform.
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source identification and health risk assessment of metals in urban soils around the tanggu chemical Industrial District tianjin china
Science of The Total Environment, 2014Co-Authors: L Zhao, Yafei Xu, Yuxian Shangguan, Fasheng LiAbstract:Abstract We conducted an investigation to identify the sources of metals in urban surface soils, and to assess the associated human health risks, around the Tanggu chemical Industrial District, Tianjin, China. The metal concentrations and spatial distributions in 70 soil samples from the study area were determined. Pollution sources were identified using multivariate statistical analysis. They mainly attributed Cu, Pb, and Zn pollution to vehicular traffic and Industrial discharges, Cd pollution to Industrial activities and anthropogenic waste including Industrial discharges, sewage sludge, and municipal solid waste, As and Hg pollution to coal combustion and point source emissions from the chemical industry, and Cr and Ni pollution to the soil parent material. Soil properties, particularly the organic matter content, were found to be important factors in the distribution and composition of metals. A health risk assessment showed that samples from the northwestern and southeastern parts of the study area may pose significant health risks to the population.
Yafei Xu - One of the best experts on this subject based on the ideXlab platform.
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source identification and health risk assessment of metals in urban soils around the tanggu chemical Industrial District tianjin china
Science of The Total Environment, 2014Co-Authors: L Zhao, Yafei Xu, Yuxian Shangguan, Fasheng LiAbstract:Abstract We conducted an investigation to identify the sources of metals in urban surface soils, and to assess the associated human health risks, around the Tanggu chemical Industrial District, Tianjin, China. The metal concentrations and spatial distributions in 70 soil samples from the study area were determined. Pollution sources were identified using multivariate statistical analysis. They mainly attributed Cu, Pb, and Zn pollution to vehicular traffic and Industrial discharges, Cd pollution to Industrial activities and anthropogenic waste including Industrial discharges, sewage sludge, and municipal solid waste, As and Hg pollution to coal combustion and point source emissions from the chemical industry, and Cr and Ni pollution to the soil parent material. Soil properties, particularly the organic matter content, were found to be important factors in the distribution and composition of metals. A health risk assessment showed that samples from the northwestern and southeastern parts of the study area may pose significant health risks to the population.