Assessment of Organochlorine Pesticide Residues in Water, Sediments and Fish from Lake Tashk, Iran

Achievements in the Life Sciences Pub Date : 2015-12-01 DOI:10.1016/j.als.2015.12.003

Farshid Kafilzadeh

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引用次数: 78

Abstract

In this study, the levels of organochlorine (OC) pesticide residues in Lake Tashk have been investigated using water, sediment and fish (carp) samples as a case study to find out the extent of pesticide contamination and accumulation in the lake. Six OC pesticides namely DDT, DDE, lindane, endosulfan, heptachlor and chlordane were analyzed in four sites at four seasons. Water samples were processed using a liquid–liquid extraction technique and gas chromatograph equipped with electron capture detector (GC-ECD). Soxhlet extraction was used for fish and sediment samples followed by clean up and gas chromatograph. DDE was the predominant residue in all the samples analyzed, at the mean concentrations of 0.075 ppb, 8.750 ppb and 4.446 ppb in water, sediment and fish samples, respectively. The lowest levels of OC pesticides were related to heptachlor and chlordane which none of them were found in water samples. Gonban and Midstream sites had the highest and the lowest concentrations of OC pesticides, respectively.

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伊朗塔什克湖水体、沉积物和鱼类中有机氯农药残留评价

本研究以塔什克湖水体、沉积物和鱼(鲤)样品为研究对象，对塔什克湖的有机氯农药残留水平进行了调查，以了解农药在湖泊中的污染和积累程度。在4个地点、4个季节对DDT、DDE、林丹、硫丹、七氯和氯丹6种有机碳农药进行了分析。水样采用液液萃取技术和配备电子捕获检测器(GC-ECD)的气相色谱仪进行处理。鱼和沉积物样品采用索氏提取，然后进行清理和气相色谱仪。在所有分析的样品中，DDE是主要残留，水、沉积物和鱼样品中的平均浓度分别为0.075 ppb、8.750 ppb和4.446 ppb。有机化合物含量最低的是七氯和氯丹，但在水样中均未检出。冈班和中游的有机酸农药浓度最高，中游的最低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Achievements in the Life Sciences

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