Journal of Food, Agriculture and Environment

Residues of persistent organic pollutants in orchard topsoil of major fruit producing regions in China

Author(s):

Shiqi Yang ¹, Aiping Zhang ¹, Yuecun Ma ², Shujing Yang ¹, Zhengli Yang ^1*

Recieved Date: 2009-01-12, Accepted Date: 2009-04-16

Abstract:

The major fruit producing regions in China include the Loess Plateau, Jiaodong Peninsular and the outskirt of Beijing, where 99 orchards were randomly chosen for this experiment. A total of 99 composite topsoil samples (0-20 cm) were collected and residual concentrations of 8 persistent organic pollutants (POPs) were determined. The POPs tested were hexachlorobenzene (HCB), chlordane, dieldrin, endrin, DDT, mirex, heptachlor and aldrin. We analyzed the environmental security and spatial patterns of POPs in the topsoil and determined that (1) the residual concentrations of the 8 POPs in orchard topsoil were within the safe limits and are no threats to environment quality. However, environmental security does not necessarily imply the safety of products, life and ecology under the same concentrations of POPs. (2) The main residue of POP in the orchard topsoil was DDT, which was widely distributed at a relatively high concentration. Residues of HCB, chlordane and heptachlor were at similar levels in the topsoil but follow that of DDT. Concentrations of dieldrin, endrin, mirex and aldrin were the lowest. (3) Areas with the most modern farming techniques and longest history of fruit planting had the highest concentrations and most extensive distribution of the various POPs studied.

Keywords:

Persistent organic pollutants (POPs), agrochemical residue, spatial pattern, orchard, environmental security

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Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Environment
Pages: 829-834

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