2002•Urban Environment & Urban EcologyRequires access

Local Spatial Variation of Organochlorine Pesticides in Agricultural Soils from Tianjin

Zhongming Gong

Abstract

Ten surface soil samples were collected from each of the three blocks of agricultural soil with or without wastewater irrigation. α-HCH,β-HCH, γ-HCH, δ-HCH, p,p'-DDE, p,p'-DDD, p,p'-DDT, and o,p'-DDT were analyzed to study the local spatial variation of the organochlorine pesticides. Significant variations in the contents of the chemicals were demonstrated. The variations were partially introduced by the wastewater irrigation which was characterized by linear reduction of the organochlorine compounds following the pattern of the wastewater irrigation. Duplicate or composite sampling is, therefore, necessary for sample collection.

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Key concepts: Irrigation, Wastewater, Environmental science, Pesticide, Soil water, Environmental chemistry, Spatial variability, Organochlorine pesticide