Occurrence of endocrine-disrupting pesticide residues in wetland sediments from Beijing, China.

Abstract:

:Wetlands are important habitats and spawning grounds to a diverse wildlife population and are particularly vulnerable to adverse effects of endocrine disruptors. Many pesticides possess hormonal activity and have thus been classified as endocrine disruptors. A new analytical method based on ultrasonic-assisted extraction, solid-phase extraction, and gas chromatography technologies was developed for analysis of selected potential endocrine-disrupting pesticide residues in wetland sediment samples from northern Beijing, China. The newly developed method was a less time-consuming and less solvent-consuming way of analyzing residues without an air-drying process prior to extraction. The selected pesticides included the compounds hexachlorocyclohexane, cyclodiene, DDTs, chlordane, hexachlorobenzene, heptachlor, endrin aldehyde, heptachlor epoxide, dicofol, acetochlor, alachlor, metolachlor, chlorpyrifos, nitrofen, trifluralin, cypermethrin, fenvalerate, and deltamethrin. Characterization and identification of the selected endocrine-disrupting pesticide residues in sediments may help to assess current pollution status of endocrine-disrupting pesticides in the area. Total concentrations of pesticides ranged from 15.4 to 38.1 ng/g (dry weight) with a mean concentration of 23.7 ng/g (dry weight) for sediment samples. Although levels of all detected pesticides were below the New York State Department of Environmental Conservation, USA, sediment quality criteria, considering the potential health effects of endocrine disruptors even in a trace level, the use of the pesticides in the agricultural system should be minimized and regular monitoring is needed in the area.

journal_name

Environ Toxicol Chem

authors

Xue N,Li F,Hou H,Li B

doi

10.1897/07-511.1

subject

Has Abstract

pub_date

2008-05-01 00:00:00

pages

1055-62

issue

5

eissn

0730-7268

issn

1552-8618

pii

07-511

journal_volume

27

pub_type

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