北京官厅水库中农药类内分泌干扰物分布和来源

Distribution and Sources of Endocrine-Disrupting Pesticides in Beijing Guanting Reservoir

研究了北京官厅水库中农药类内分泌干扰物污染水平、分布特点和来源.结果表明,官厅水库及其支流水体受到农药类内分泌干扰物轻度污染.从农药在官厅水库中的分布推断,官厅水库以及各支流周边地区及农田排水渠是水库中农药的重要来源.底泥中农药通过底泥孔隙向表面水扩散,是表面水农药的1个污染源.由于水库周边较多的农业活动,可能导致水中农药浓度提高.为了减少污染和水生生物对内分泌干扰物的暴露,需要进行定期监测,减少农药的使用和农事操作.

Distribution and sources of endocrine-disrupting pesticides in Guanting reservoir were studied, The results show that pesticide values in a few sites are considerately high considering to being used as a drinking water source. The variation in concentration of pesticides among sites was expected to be caused from several pathways such as contaminants through the rivers and drainage of contaminated water from the surrounding agricultural fields. To reduce exposure to these endocrine-disrupting compounds, the abundant current use of the pesticides in the area and the river watersheds should be minimized and further measures need be taken for using as potable water supply.