Residues and Spatial Distribution of Organochlorine Pesticides in Arable Land from Liaocheng

Abstract:

In order to determine the residues and the distribution characteristics of organochlorine pesticides (OCPs) in arable land from Liaocheng City, 136 soil samples were collected using lattice method. The samples were extracted by accelerated solvent extraction (ASE), the residual amounts of 8 types of OCPs, including α-BHC, β-BHC, γ-BHC, δ-BHC, p,p′-DDE, p,p′-DDT, p,p′-DDD and o,p′-DDT, were analyzed with GC-ECD. With the aid of software of SPSS and ArcGIS, residues and spatial distributions of 8 OCPs were analyzed. The results showed that all OCPs had different detectable rates and residual amounts. p,p′-DDE was the primary pollutant in arable land of Liaocheng. Its detectable rate and average residual amount were both highest, 92.65% and 74.16µg•kg-1 respectively, over the first grade criteria (50µg•kg-1) of the national standard for soil environment quality, while the residual amounts of the other OCPs were at a low level and didn't pollute the arable land. The results of spatial distribution showed that the 8 OCPs varied greatly. β-BHC distributed widely, and the others were relatively concentrated. There was a significant difference of γ-BHC and DDTs between Linqing county and the other counties, and the residual amounts in Linqing were highest, and there was no obvious difference among the other counties

• Periodical: Advanced Materials Research (Volumes 588-589)
• Pages: 2060-2063
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.588-589.2060
• Online since: November 2012
• Authors: Yan Wang, Bao Hua Zhang, Xi Zhang
• Keywords: Arable Land, Environmentalology, Organochlorine Pesticide, Spatial Distribution

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