Integration of Chemical Methods and Biomarkers for Assessment of Chlorimuron-Ethyl Bioavailability in Soil附视频

被引：0
|
作者：
REN Wenjie [1 ,2 ]
WANG Meie [3 ]
ZHOU Qixing [4 ]
TENG Ying [1 ]
机构：
[1] Key Laboratory of Soil Environment and Pollution Remediation of Chinese Academy of Sciences,Institute of Soil Science,Chinese Academy of Sciences
[2] Key Laboratory of Pollution Ecology and Environmental Engineering,Institute of Applied Ecology,Chinese Academy of Sciences
[3] State Key Laboratory of Urban and Regional Ecology,Research Centre for Eco-Environmental Sciences,Chinese Academy of Sciences
[4] Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education),College of Environmental Science and Engineering,Nankai
来源：
Pedosphere | 2016年 / 03期
关键词：
D O I：
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中图分类号：
X825 [土壤评价];
学科分类号：
0903 ;
摘要：
Bioavailability is a critical factor for assessing the environmental risk of organic pollutants in soil. In this study, extractions with 3 different solvents, including 2 aqueous solutions, calcium chloride（CaCl2） and a phosphate buffer solution（PBS）, and a mixture of aqueous solution and organic solvent, a PBS-methanol（8:2,volume/volume） mixture（PBS-M）, were performed to assess the bioavailability of chlorimuron-ethyl in soil in comparison to a battery of toxicity tests in wheat seedlings. The results indicated that the peroxidase（POD） activity in wheat leaves after 7 d of exposure was one of the sensitive biomarkers of chlorimuron-ethyl in soil.The extractability of chlorimuron-ethyl by all the 3 solvents decreased with exposure time, and the rate of decrease of the PBS-M extraction between 1 and 7 d of exposure was substantially higher than those of the aqueous solution extractions. Chlorimuron-ethyl gradually changed from a water-soluble form into a soil organic matter（SOM）-bound form in the soil. The PBS extraction correlated best with the POD activity in the leaves after 7 d of exposure.
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页码：273 / 281
页数：9
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