DDTs and other organochlorine pesticides in tissues of four bird species from the Rift Valley region, Ethiopia.
DDTs and other organochlorine pesticides in tissues of four bird species from the Rift Valley region, Ethiopia.
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DOI：
10.1016/j.scitotenv.2016.08.056
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Y. Yohannes;Y. Ikenaka;S. Nakayama;H. Mizukawa;M. Ishizuka
中科院分区：
文献类型：
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作者：
Y. Yohannes;Y. Ikenaka;S. Nakayama;H. Mizukawa;M. Ishizuka
尽管鸟类种类繁多，数量众多，但关于栖息在非洲的鸟类中有机氯农药残留的数据极少。在本研究中，浓度的二氯二苯基三氯乙烷（DDTs），六氯环己烷，drins，环二烯，和六氯苯的肝脏，肾脏，心脏和大脑的4种鸟类从东非大裂谷地区，埃塞俄比亚。为控制疟疾病媒而在室内残留喷洒滴滴涕，以及滥用和非法使用农药，突出表明了这项研究的相关性。五氯苯酚的含量范围为1.87 - 4586纳克/克湿重，食腐鸟类Leptoptilos crumeniferus在肝脏中的含量最高。在所有组织中，该物种内的有机氯农药污染情况相似，滴滴涕与其他有机氯农药污染情况相似。在DDTs中，p，p '-DDE是含量最高的化合物，在所有组织中的负荷均显著较高。风险表征证明了与DDE暴露相关的研究鸟类的潜在风险。p，p '-DDE的最大肝脏水平超过了报告的触发不良反应的水平。在所有鸟类组织中检测到p，p '-DDT，表明新鲜DDT释放到环境中。这是第一项分析埃塞俄比亚裂谷地区鸟类不同组织中OCPs的研究，因此这些数据将作为未来研究的参考数据。
Despite the presence of a wide variety and number of birds, there is exceedingly little data on organochlorine pesticide (OCP) residues in birds inhabiting in Africa. In the present study, concentrations of dichlorodiphenyltrichloroethanes (DDTs), hexachlorocyclohexanes, drins, cyclodienes, and hexachlorobenzene were measured in liver, kidney, heart and brain of 4 bird species from the Rift Valley region, Ethiopia. Indoor residual spraying of DDT for malaria vector control, and indiscriminate and illegal use of pesticides underline the relevance of this study. Levels of ΣOCPs ranged from 1.87 to 4586 ng/g wet weight, and the scavenger bird speciesLeptoptilos crumeniferushad the highest level in liver. In all tissues, contamination profiles of OCPs within the species were similar, with DDTs ≫ other OCPs. Among the DDTs,p,p'-DDE was the most abundant compound and had significantly a higher burden in all tissues. The risk characterization demonstrated potential risks to the studied birds associated with DDE exposure. Maximum hepatic levels ofp,p'-DDE exceeded the levels reported to trigger adverse effects. The detection ofp,p'-DDT in all bird tissues suggests the release of fresh DDT to the environment. This is the first study to assay OCPs in different tissues of birds from the Ethiopian Rift Valley region, and henceforth the data will serve as a reference data for future studies.