Determination of Organochlorine Compounds in Sediments from the Upper Middle Sao Francisco River （Bahia, Brazil）  

作　　者：Alexsandro Fiscina de Santana Eva Vidal Vatzquez Jorge Paz-Ferreiro Magda Beretta 

机构地区：[1]Polytechnic Faculty, Federacao, Federal University of Bahia (UFBA), Salvador, Bahia 40210-630, Brazil [2]Faculty of Soil Sciences, University of A Coruna (UDC), Coruna 15071, Spain

出　　处：《Journal of Earth Science and Engineering》2012年第7期401-411,共11页地球科学与工程（英文版）

摘　　要：The objective of this study was to determine the contamination of OCPs （organochlorine pesticides） in sediments from the upper middle of Sao Francisco River （Bahia, Brazil） in order to evaluate their potential pollution risks. Samples of surface sediments were collected using a Petersen dredge at 21 stations located between Sobradinho and Cura^i. The organochlorine compounds analyzed were： p,p＇-DDT, p,p＇-DDD, p,p＇-DDE, dicofol, methoxychlor, HCHs, aldrin, endrin, endrin aldehyde, endrin ketone, dieldrin, heptachlor, heptachlor epoxide, endosulfan （ct, fl and sulfate） and chlordane （ct and ,/）. Extractions were carried out using the MAE （microwave-assisted extraction） method and organochlorine pesticides determination was achieved by GC/MS （gas chromatography-mass spectrometry）. Organochlorine concentrations ranged between 1.51-820.00 ng.gx, indicating very low to high levels. The most frequent OCPs were endrin aldehyde, -HCH, HCH, HCH, heptachlor and heptachlor epoxide.

关 键 词：SEDIMENTS organochlorine pesticides SAo Francisco River Brazil. 

分 类 号：X830.2[环境科学与工程—环境工程] P736.41[天文地球—海洋地质]