Vertical Distributions of Organochlorine Pesticides and Polychlorinated Biphenyls in an Agricultural Soil Core from the Guanzhong Basin, China

Overview

Journal Environ Monit Assess

Publisher Springer

Specialty Environmental Health

Date 2014 Nov 26

PMID 25421859

Citations 1

Authors

Hongxuan Lu

Weiguo Liu

Affiliations

Soon will be listed here.

Abstract

The concentrations and distributions of hexachlorocyclohexanes (HCHs), dichlorodiphenyltrichloroethanes (DDTs), and polychlorinated biphenyls (PCBs) in an agricultural soil core in the Guanzhong Basin, China were determined. Overall, p,p'-DDT and p,p'-DDE were dominant contaminants and accounted for approximately 48.4 and 23.3% of the total detected DDTs. Low chlorinated PCBs (PCB 28 and PCB 52) were generally detected at higher concentrations and more frequently than high chlorinated PCBs. The peak values of ∑DDT (12.92 ng/g), ∑HCH (2.25 ng/g), and ∑PCB (3.44 ng/g) occurred in the 10-15, 15-20, and 5-10 cm sections, respectively. The negative correlation between the organochlorine pesticide (OCP) concentrations and the soil depths and the relatively high p,p'-DDT/p,p'-DDE ratios in the surface soils indicated that these chemicals were recently used illegally, despite their official ban in 1983. The increase in the ratio of α-/γ-HCH with increasing soil depth indicated that the use of lindane decreased relative to the use of technical HCHs in recent years.

Citing Articles

Source apportionment of DDTs in maricultured fish: a modeling study in South China.

Fang S, Bao L, Yiruhan , Zeng E Environ Sci Pollut Res Int. 2015; 23(8):7162-8.

PMID: 26081772 DOI: 10.1007/s11356-015-4756-4.

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