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Factors Influencing the Spatial Distribution of Organochlorine Pesticides in Soils surrounding Chemical Industrial Parks
Author(s) -
Wang Guang,
Lu Yonglong,
Wang Tieyu,
Zhang Xiang,
Han Jingyi,
Luo Wei,
Shi Yajuan,
Li Jing,
Jiao Wentao
Publication year - 2009
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq2008.0004
Subject(s) - topsoil , environmental science , environmental chemistry , hexachlorocyclohexane , soil water , spatial distribution , pesticide , lindane , persistent organic pollutant , total organic carbon , pollution , organochlorine pesticide , distribution (mathematics) , contamination , environmental engineering , soil science , ecology , chemistry , geography , biology , mathematical analysis , remote sensing , mathematics
Topsoil samples ( n = 105) were collected to study the distribution of dichlorodiphenyltrichloroethane (DDT) and hexachlorocyclohexane (HCH) residues in the vicinity of chemical industrial parks in Tianjin, China. The occurrence and distribution of target organochlorine pesticides (OCPs) were mapped to identify the spatial variation using Geographical Information System (GIS). In general, the concentrations of OCPs were higher in soils near the industrial parks, even some hotspots showed very high OCP contaminations which could cause ecological risk. The relationships between contaminant concentrations and other factors (land use and soil properties) were discussed. Significant correlations ( P < 0.01) between TOC contents and the concentrations of DDTs, α‐HCH, and β‐HCH indicated the effect of organic carbon on OCP distribution. Soil pH levels had no obvious effect on the OCP distributions. Except for the effects of the industrial parks, the capacities of biodegradation and dissipation of soils under different land uses were the important factors that affected the HCH distribution, but the distribution of DDTs was mainly influenced by the TOC levels. The results of this study can provide some evidences and data on the long term effects of industrial activities in the environment even after the cease of operations for a long time.