我国东南地区饮用水源地多种农药的赋存特征及健康风险评估

为阐明我国东南地区典型饮用水源地农药类微污染物的污染特征及生态风险，检测评估了某省7个水库的苯并咪唑类、酰胺类、三唑类和有机磷类等19类共55种常用农药的检出频率、检出浓度以及每种农药对于绿藻、水蚤和鱼类这3种不同营养级生物的风险商.在分析的55种农药中，多菌灵和乙草胺的检出频率为100%,12种农药的检出频率在80%以上.多菌灵的检出浓度最高(77.7 ng·L^-1),其次是乙草胺(51.6 ng·L^-1).风险评估结果显示，大部分农药在目标区域都处于低风险状态.对于3种生物来说，乙草胺是绿藻的风险主导型农药，而多菌灵是鱼类和水蚤的风险主导型农药.

Occurrence and Health Risk Assessment of Multiple Pesticides in Drinking Water Sources of Southeast China

To elucidate the pollution characteristics and ecological risks of pesticide micro-pollutants in typical drinking water sources in Southeast China, the detection frequency, detection concentration, and risk quotient of each pesticide for three different trophic levels of organisms (green algae, daphnia, and fish) were analyzed for a total of 55 commonly used pesticides in 19 categories, including benzimidazoles, amides, triazoles, and organophosphates, in seven reservoirs in Southeast China. Among the 55 pesticides analyzed, two pesticides (carbendazim and acetochlor) had a detection frequency of 100%, and 12 pesticides had a detection frequency of 80% or more. The highest detection concentration was found for carbendazim (77.7 ng·L^-1), followed by that of acetochlor (51.6 ng·L^-1). The results of the risk assessment showed that most of the pesticides were at low risk in the target areas. For the three organisms, acetochlor was the risk-dominant pesticide for green algae, whereas carbendazim was the risk-dominant pesticide for fish and daphnia.