期刊名称：International Research Journal of Environmental Sciences
电子版ISSN：2319-1414
出版年度：2015
卷号：4
期号：6
页码：16-27
语种：English
出版社：International Science Community Association
摘要：A survey was conducted in five different Unions of Bagerhat Upazila under Bagerhat District, Bangladesh to know the various types of chemical pesticides applied by the farmers to boast up agricultural productivity. Ten water and ten soil samples were collected from shrimp-cum-paddy farms, and analyzed the presence of organochlorine and organophosphorus pesticides. Liquid-Liquid Extraction (LLE) and Shaker Extraction (SE) method were used to extract the residual levels of pesticides from water and soil samples respectively. Qualitative and quantitative analysis of the residual levels of the notorious organochlorine pesticide, Dichloro-Diphenyl-Trichloroethane (DDT) and its hydrolytic degradation product, Dichloro-Diphenyl-Dichloroethane (DDD) as well as three different frequently used organophosphorous pesticides namely Chloropyriphos, Diazinon and Malathion were determined by the High Performance Liquid Chromatography (HPLC) method. Results revealed that none of the water and soil samples from the shrimp-cum-paddy farms of Bagerhat Upazila was contaminated with any of the pesticides examined. These results indicate that either these pesticides have not been indiscriminately applied at least in the shrimp-cum-paddy farms of this area or have degraded by the time the samples were collected.
