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题名: Integration of Chemical Methods and Biomarkers for Assessment of Chlorimuron-Ethyl Bioavailability in Soil
作者: Ren Wenjie; Wang Meie; Zhou Qixing; Teng Ying
刊名: PEDOSPHERE
出版日期: 2016-06
卷号: 26, 期号:3, 页码:273-281
关键词: chemical extraction ; environmental risk ; organic pollutants ; organic solvent ; peroxidase activity ; phosphate buffer solution ; toxicity test
DOI: 10.1016/S1002-0160(15)60042-X
部门归属: 城市与区域生态国家重点实验室
英文摘要: 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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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35611
Appears in Collections:城市与区域生态国家重点实验室_期刊论文

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