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环境化学  2015 

根际土壤中DDTs的残留与转化

Keywords: 根际土壤,小麦,DDT,残留

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Abstract:

通过根垫法研究DDT的五种异构体p,p′-DDE,o,p′-DDD,p,p′-DDD,o,p′-DDT,p,p′-DDT在小麦根际土壤和非根际土壤中的残留量以及DDT,DDD和DDE之间的转化.结果发现,在40d试验期间内,DDT发生缓慢降解,根际土壤中的降解略快于非根际土壤,且差别主要表现在生成DDD的厌氧过程方面.此外,根际土壤中五种DDT的异构体的可提取残留都高于非根际土壤,说明该农药的锁定过程在根际环境相对较弱.

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