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Effects of methamidophos and copper on ecological detoxification of acetochlor by earthworm in phaeozem

LIANG Jidong1,2; ZHOU Qixing1,3   

  1. 1Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;2College of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;3College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
  • Received:2005-10-08 Revised:2006-08-01 Online:2006-10-18 Published:2006-10-18

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Abstract: By using microcosm culture method, this paper studied the dynamic changes of acetochlor degradation by earthworm in phaeozem with methamidophos or copper addition, aimed to approach the feasibility of using earthworm to intensify the detoxification of acetochlor. The results showed that the dynamics of acetochlor degradation accorded with the first-order reaction kinetics, whether earthworm existed or not. The activities of earthworm accelerated the detoxification of acetochlor, and the coexistence of methamidophos or copper with acetochlor evidently inhibited the degradation of acetochlor. The coexistence of methamidophos and acetochlor or of copper and higher concentration acetochlor altered the dynamics of acetochlor degradation, while the coexistence of copper and lower concentration acetochlor didn’t have any obvious effect on the detoxification of acetochlor.