Concentrations and possible sources of polychlorinated biphenyls in the soils of Hong Kong

H. B. Zhang; Y. M. Luo; M. H. Wong; Q. G. Zhao; G. L. Zhang

doi:10.1016/j.geoderma.2006.11.016

Concentrations and possible sources of polychlorinated biphenyls in the soils of Hong Kong

H. B. Zhang, Y. M. Luo^*, M. H. Wong, Q. G. Zhao, G. L. Zhang

^*Corresponding author for this work

Department of Biology

Research output: Contribution to journal › Journal article › peer-review

59 Citations (Scopus)

Abstract

A total of 66 surface (0-10 cm) soil samples covering the whole territory of Hong Kong were collected for analysis of the seven PCB congeners. The detectable concentrations of PCBs in the soils of Hong Kong ranged from 0.07 to 9.87 μg kg^{- 1}, with a higher concentration in the urban area than in the countryside. PCB patterns were dominated by the low chlorinated congeners. PCB118, a dioxin-like congener, was found in samples from Tsuen Wan and Sha Tin and was assumed to be deposited from local sources. Principal component analysis (PCA) revealed that the sources of PCBs were mainly associated with Aroclor 1242 and Aroclor 1248. A significant linear correlation between the concentrations of soil organic matter (SOM) and the sum of 7 PCBs and of SOM and PCB153 was observed. In total, PCBs were not a severe contamination in the soils of Hong Kong from the current results. However, long-term monitoring is still recommended to keeping, especially in the landfill deposits and some urban parks.

Original language	English
Pages (from-to)	244-251
Number of pages	8
Journal	Geoderma
Volume	138
Issue number	3-4
DOIs	https://doi.org/10.1016/j.geoderma.2006.11.016
Publication status	Published - 15 Mar 2007

Scopus Subject Areas

Soil Science

User-Defined Keywords

Hong Kong soils
PCB congener pattern
Principal component analysis (PCA)

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10.1016/j.geoderma.2006.11.016

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title = "Concentrations and possible sources of polychlorinated biphenyls in the soils of Hong Kong",

abstract = "A total of 66 surface (0-10 cm) soil samples covering the whole territory of Hong Kong were collected for analysis of the seven PCB congeners. The detectable concentrations of PCBs in the soils of Hong Kong ranged from 0.07 to 9.87 μg kg- 1, with a higher concentration in the urban area than in the countryside. PCB patterns were dominated by the low chlorinated congeners. PCB118, a dioxin-like congener, was found in samples from Tsuen Wan and Sha Tin and was assumed to be deposited from local sources. Principal component analysis (PCA) revealed that the sources of PCBs were mainly associated with Aroclor 1242 and Aroclor 1248. A significant linear correlation between the concentrations of soil organic matter (SOM) and the sum of 7 PCBs and of SOM and PCB153 was observed. In total, PCBs were not a severe contamination in the soils of Hong Kong from the current results. However, long-term monitoring is still recommended to keeping, especially in the landfill deposits and some urban parks.",

keywords = "Hong Kong soils, PCB congener pattern, Principal component analysis (PCA)",

author = "Zhang, {H. B.} and Luo, {Y. M.} and Wong, {M. H.} and Zhao, {Q. G.} and Zhang, {G. L.}",

note = "Funding Information: The authors are grateful for the financial supports from the Major State Basic Research Development Program of China (973 Program No. 2002CB410810), the National Natural Science Foundation of China (No. 40432005) and the Strategic Research Fund of Hong Kong Baptist University. We also appreciate Dr. Peter Christie of Queen's University Belfast for the language corrections and two anonymous reviewers for their valuable comments.",

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AU - Zhang, H. B.

AU - Luo, Y. M.

AU - Wong, M. H.

AU - Zhao, Q. G.

AU - Zhang, G. L.

N1 - Funding Information: The authors are grateful for the financial supports from the Major State Basic Research Development Program of China (973 Program No. 2002CB410810), the National Natural Science Foundation of China (No. 40432005) and the Strategic Research Fund of Hong Kong Baptist University. We also appreciate Dr. Peter Christie of Queen's University Belfast for the language corrections and two anonymous reviewers for their valuable comments.

PY - 2007/3/15

Y1 - 2007/3/15

N2 - A total of 66 surface (0-10 cm) soil samples covering the whole territory of Hong Kong were collected for analysis of the seven PCB congeners. The detectable concentrations of PCBs in the soils of Hong Kong ranged from 0.07 to 9.87 μg kg- 1, with a higher concentration in the urban area than in the countryside. PCB patterns were dominated by the low chlorinated congeners. PCB118, a dioxin-like congener, was found in samples from Tsuen Wan and Sha Tin and was assumed to be deposited from local sources. Principal component analysis (PCA) revealed that the sources of PCBs were mainly associated with Aroclor 1242 and Aroclor 1248. A significant linear correlation between the concentrations of soil organic matter (SOM) and the sum of 7 PCBs and of SOM and PCB153 was observed. In total, PCBs were not a severe contamination in the soils of Hong Kong from the current results. However, long-term monitoring is still recommended to keeping, especially in the landfill deposits and some urban parks.

AB - A total of 66 surface (0-10 cm) soil samples covering the whole territory of Hong Kong were collected for analysis of the seven PCB congeners. The detectable concentrations of PCBs in the soils of Hong Kong ranged from 0.07 to 9.87 μg kg- 1, with a higher concentration in the urban area than in the countryside. PCB patterns were dominated by the low chlorinated congeners. PCB118, a dioxin-like congener, was found in samples from Tsuen Wan and Sha Tin and was assumed to be deposited from local sources. Principal component analysis (PCA) revealed that the sources of PCBs were mainly associated with Aroclor 1242 and Aroclor 1248. A significant linear correlation between the concentrations of soil organic matter (SOM) and the sum of 7 PCBs and of SOM and PCB153 was observed. In total, PCBs were not a severe contamination in the soils of Hong Kong from the current results. However, long-term monitoring is still recommended to keeping, especially in the landfill deposits and some urban parks.

KW - Hong Kong soils

KW - PCB congener pattern

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Concentrations and possible sources of polychlorinated biphenyls in the soils of Hong Kong

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