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

文献类型: 外文期刊

第一作者: Yang, Shiqi

作者: Yang, Shiqi;Zhang, Aiping;Yang, Shujing;Yang, Zhengli;Yang, Shujing

作者机构:

关键词: Persistent organic pollutants (POPs);agrochemical residue;spatial pattern;orchard;environmental security

期刊名称:JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT ( 影响因子:0.435; 五年影响因子:0.484 )

ISSN: 1459-0255

年卷期: 2009 年 7 卷 2 期

页码:

收录情况: SCI

摘要: 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 tinder 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 modem farming techniques and longest history of fruit planting had the highest concentrations and most extensive distribution of the various POPs studied.

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