Title: Phytoextraction and Potential Remediation of Dicofol in Soil by Ageratum conyzoides
Abstract: Uptake and potential remediation of dicofol in soil by Ageratum conyzoides were studied. At the concentration of 250 mg·kg-1,the dicofol content in aerial tissues of A. conyzoide decreased in both sterilization and free treatment. The dicofol in aerial tissues under sterilization treatment varied from 4 334 μg·kg-1 in 10 d to 1 556 μg·kg-1 in 30 d. Contrasted with the changes of dicofol in aerial tissues in A. conyzoides,the roots growing in free soil contained much higher dicofol than those in sterilized soil. And the dicofol in roots increased from 5 442 μg·kg-1 in 10 d to 8 039 μg·kg-1 in 30 d in free treatment. The concentrations of dicofol in the soil did not obviously affect its accumulation in aerial tissues of A. conyzoide,while its accumulation in roots showed some relationship with the concentrations of dicofol applied to soil. Under sterilization treatment,the half-lives of dicofol in soil planted A. conyzoides were respectively 11.32,12.80,13.08 d,but they were 21.40,21.37,23.25 d without A. conyzoides when the concentrations used were 250,333,500 mg·kg-1. When the soil was not sterilized,the half-lives of dicofol in soil planted A. conyzoides were 10.72,11.71,12.07 d,but they were 16.89,17.33,16.17 d without A. conyzoides when the concentrations used were 250,333,500 mg·kg-1,respectively. In general,A. conyzoides can accumulate the dicofol from soil and showed the remediation potential for dicofol residues in soil. Meanwhile,the microorganism in soil can affect the accumulation of dicofol by A. conyzoides.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 1
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