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[The effects of organic matter and hydrous metal oxides on the anaerobic degradation of gamma-666, p,p'-DDT in Liaohe River sediments].

Authors
  • Zhao, Xu
  • Quan, Xie
  • Zhao, Huimin
  • Chen, Shuo
  • Chen, Jingwen
  • Zhao, Yazhi
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
May 01, 2002
Volume
23
Issue
3
Pages
115–118
Identifiers
PMID: 12145926
Source
Medline
License
Unknown

Abstract

Effects of organic matter and active Fe, Al, Mn oxides on the anaerobic degradation of gamma-666, p,p'-DDT were investigated by means of removing organic matter and hydrous metal oxides in Liaohe River sediments sequentially. The results showed that the anaerobic degradation of gamma-666, p,p'-DDT followed pseudo-first-order kinetics in different sediments; but, the extents and rates of degradation were different, even the other conditions remained same. Anaerobic degradation rates of gamma-666, p,p'-DDT were 0.020 d-1, 0.009 d-1 respectively for the sediments without additional carbon resources. However, with additional carbon resources, the anaerobic degradation rates of gamma-666, p,p'-DDT were 0.071 d-1 and 0.054 d-1 in the original sediments respectively. After removing organic matter, the rates were decreased to 0.047 d-1, 0.037 d-1. In the sediments removed organic matter and hydrous metal oxides, the rates were increased to 0.067 d-1, 0.059 d-1. This results indicated that organic matter in the sediments accelerated the anaerobic degradation of gamma-666, p,p'-DDT; the hydrous metal oxides inhibited the anaerobic degradation of gamma-666 and p,p'-DDT.

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