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粤桂琼区域水源地有机磷农药的生态风险评价

刘昕宇 汤嘉骏 张 荧 李 逸 魏立菲 王 俊 解启来

刘昕宇, 汤嘉骏, 张 荧, 李 逸, 魏立菲, 王 俊, 解启来. 粤桂琼区域水源地有机磷农药的生态风险评价[J]. 环境科学研究, 2015, 28(7): 1130-1137.
引用本文: 刘昕宇, 汤嘉骏, 张 荧, 李 逸, 魏立菲, 王 俊, 解启来. 粤桂琼区域水源地有机磷农药的生态风险评价[J]. 环境科学研究, 2015, 28(7): 1130-1137.
LIU Xinyu, TANG Jiajun, ZHANG Ying, LI Yi, WEI Lifei, WANG Jun, XIE Qilai. Ecological Risk Assessment of Organophosphorus Pesticides in Water Source Areas of Guangdong, Guangxi and Hainan Provinces[J]. Research of Environmental Sciences, 2015, 28(7): 1130-1137.
Citation: LIU Xinyu, TANG Jiajun, ZHANG Ying, LI Yi, WEI Lifei, WANG Jun, XIE Qilai. Ecological Risk Assessment of Organophosphorus Pesticides in Water Source Areas of Guangdong, Guangxi and Hainan Provinces[J]. Research of Environmental Sciences, 2015, 28(7): 1130-1137.

粤桂琼区域水源地有机磷农药的生态风险评价

基金项目: 国家自然科学基金项目(41303082)

Ecological Risk Assessment of Organophosphorus Pesticides in Water Source Areas of Guangdong, Guangxi and Hainan Provinces

  • 摘要: 利用气相色谱-质谱检测粤桂琼(广东、广西、海南三省区)区域水源地9个采样点水样中的有机磷农药浓度,构建了淡水生物对有机磷农药的物种敏感性分布,并计算出各类水生生物的HC5(hazardous concentration for 5% the species)值;采用基于浓度加和模型的混合物风险商值法和商值概率分布法,评价了粤桂琼区域水源地中敌敌畏、内吸磷、阿特拉津、甲基对硫磷、乐果、马拉硫磷和对硫磷7种有机磷农药的的生态风险,同时利用聚类分析法对9个采样点进行了生态风险评价. 结果表明:粤桂琼区域水源地7种有机磷农药的总质量浓度在nd~1 260.95 ng/L之间,平均值为184.68 ng/L,主要以马拉硫磷、甲基对硫磷、对硫磷和乐果为主. 东莞东江南支流、玉林苏烟水库和柳州柳江水源地的生态风险级别相对较高. 敌敌畏、对硫磷、甲基对硫磷的HC5值均低于0.1 μg/L,这3种物质对生态系统毒性效应较大. 根据风险商结果排序可知,粤桂琼区域水源地预防的重点为甲基对硫磷、对硫磷和马拉硫磷对水生生物的危害,其中甲基对硫磷是对混合风险商贡献最高的污染物,其危害指数达21.313;在95%的置信区间内,甲基对硫磷、对硫磷和马拉硫磷的生态风险较大,风险商超过1的概率为5%,应作为最优先控制的污染物.

     

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