文献类型：期刊文献

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

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

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

第一作者：Yan Fu

机构：[1]Institute of Pesticide and Environmental Toxicology, Zhejiang University;[2]Research Institute of Subtropical Forestry, Chinese Academy of Forestry

年份：2015

卷号：0

期号：9

起止页码：101-107

中文期刊名：环境科学学报：英文版

收录：CSTPCD;;Scopus;CSCD:【CSCD2015_2016】；PubMed;

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

语种：英文

中文关键词：水稻籽粒;水稻田;风险;膳食;环境;最大残留限量;实验室条件;毒死蜱

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

分类号：S511;S451.21

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(ARf D = 0.1 mg/kg bw). The estimated short-term intakes(ESTIs) were 0.78% and 0.25% of the ARf D for chlorpyrifos. The results showed that the use of chlorpyrifos in rice paddies was fairly safe for consumption of rice grain by consumers.
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（ARf D = 0.1 mg/kg bw）. The estimated short-term intakes（ESTIs） were 0.78% and 0.25% of the ARf D for chlorpyrifos. The results showed that the use of chlorpyrifos in rice paddies was fairly safe for consumption of rice grain by consumers.