文献类型：期刊文献

英文题名：Distribution of chlorpyrifos in rice paddy environment and its potential dietary risk

作者：Fu, Yan[1] Liu, Feifei[1] Zhao, Chenglin[1] Zhao, Ying[1] Liu, Yihua[2] Zhu, Guonian[1]

第一作者：Fu, Yan

通信作者：Zhu, GN[1]

机构：[1]Zhejiang Univ, Inst Pesticide & Environm Toxicol, Hangzhou 310000, Zhejiang, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Peoples R China

年份：2015

卷号：35

起止页码：101-107

外文期刊名：JOURNAL OF ENVIRONMENTAL SCIENCES

收录：;EI(收录号：20153601230607);Scopus(收录号：2-s2.0-84940519263);WOS:【SCI-EXPANDED(收录号:WOS:000362982300013)】；

基金：This research was supported by the National Natural Science Foundation of China (No. 31101458).

语种：英文

外文关键词：Chlorpyrifos; Distribution; Paddy environment; Dietary risk assessment

摘要：Chlorpyrifos is one of the most extensively used insecticides in China. The distribution and residues of chlorpyrifos in a paddy environment were characterized under field and laboratory conditions. The half-lives of chlorpyrifos in the two conditions were 0.9-3.8 days (field) and 2.8-10.3 days (laboratory), respectively. The initial distribution of chlorpyrifos followed the increasing order of water < straw < soil, and soil was characterized as the major absorber. The ultimate residues in rice grain were below the maximum residue limit (MRL) with a harvest interval of 14 days. The chronic exposure for chlorpyrifos was rather low compared to the acceptable daily intake (ADI = 0.01 mg/kg bw) due to rice consumption. The chronic exposure risk from chlorpyrifos in rice grain was 5.90% and 1.30% ADI from field and laboratory results respectively. Concerning the acute dietary exposure, intake estimated for the highest chlorpyrifos level did not exceed the acute reference dose (ARfD = 0.1 mg/kg bw). The estimated short-term intakes (ESTIs) were 0.78% and 0.25% of the ARfD for chlorpyrifos. The results showed that the use of chlorpyrifos in rice paddies was fairly safe for consumption of rice grain by consumers. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.