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[Study on removal rule of endosulfan in surface flow constructed wetland].

Authors
  • Qin, Jing
  • Gao, Fu-Wei
  • Xie, Hui-Jun
Type
Published Article
Journal
Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.]
Publication Date
Nov 01, 2013
Volume
34
Issue
11
Pages
4251–4256
Identifiers
PMID: 24455931
Source
Medline
License
Unknown

Abstract

Endosulfan is a kind of widespread organochlorine pollutant in the environment. The removal rule of three different concentrations of endosulfan in different parts of a surface flow constructed wetland was investigated. The concentrations of endosulfan in water, plants, non-rhizosphere sediments and rhizosphere sediments were determined by the Soxhlet extraction-GC method. The results showed that constructed wetland was efficient in endosulfan removal. The removal rate of endousulfan in water, non-rhizosphere sediments and rhizosphere sediments was 87.9%, 63.0% and 70.9%, respectively. In this system, alpha-endosulfan was removed faster than beta-endosulfan and the metabolite accumulated was mainly endosulfan sulfate. The adsorption of sediments played an important role in the removal of endosulfan. About 80.0% of endosulfan in water could be adsorbed by sediments within three days. The removal rate of endosulfan could be enhanced by plants. Because of the effect of plants, the average removal rate of endosulfan in rhizosphere sediments was 7.9% higher than that in non-rhizosphere sediments.

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