Pillai M K
Sci Total Environ. 1986 Nov 1;55:321-7. doi: 10.1016/0048-9697(86)90189-0.
In India organochlorine insecticides such as DDT and HCH constitute more than 70% of the pesticides used at present. Its continued use has given interest to monitor for the last few years the extent of organochlorine insecticide residues in soil, water, air and rain water in Delhi area. Out of the 50 samples each of soil and earthworms collected from different parts 48 samples showed that soil and earthworms contained 0-2.61 and 0-37.74 mg Kg-1 of total DDT residues respectively. The area near the vicinity of the DDT factory showed high levels of DDT residues. A two-year survey of the Yamuna river in Delhi showed that water contained an average of 0.24 ug L-1 and the bottom sediment had 0.24 mg Kg-1 of total DDT residues. The fishes collected from the Yamuna river showed very high bioaccumulation of DDT residues. The air and rainwater samples monitored from 3 different areas for two years indicated that DDT was more near the DDT factory area while HCH was more near a commercial complex. These results indicate that the overall organochlorine-residue levels in Delhi is not alarming. It probably indicates that DDT and HCH are more rapidly dissipated and degraded in a tropical country like India.
在印度，有机氯杀虫剂如滴滴涕（DDT）和六氯环己烷（HCH）占目前使用的杀虫剂的70%以上。在过去几年里，其持续使用引发了对德里地区土壤、水、空气和雨水中有机氯杀虫剂残留程度进行监测的兴趣。从不同地点采集的50份土壤样本和50份蚯蚓样本中，有48份样本显示土壤和蚯蚓中的滴滴涕总残留量分别为0至2.61毫克/千克和0至37.74毫克/千克。滴滴涕工厂附近地区的滴滴涕残留量很高。对德里亚穆纳河进行的为期两年的调查显示，河水的滴滴涕平均含量为0.24微克/升，河底沉积物的滴滴涕总残留量为0.24毫克/千克。从亚穆纳河采集的鱼类显示出滴滴涕残留的生物累积程度很高。对三个不同地区进行了为期两年的空气和雨水样本监测，结果表明，滴滴涕在滴滴涕工厂附近地区的含量更高，而六氯环己烷在一个商业综合区附近的含量更高。这些结果表明，德里地区有机氯的总体残留水平并不令人担忧。这可能表明，在印度这样的热带国家，滴滴涕和六氯环己烷的消散和降解速度更快。
