贵阳市饮用水源地邻苯二甲酸酯污染特征及健康风险

为了解贵阳市饮用水源地水环境中邻苯二甲酸酯（PAEs）的污染情况，采用三重四级杆串联质谱联用技术（GC/MSMS）对阿哈水库、红枫湖、百花湖水体中PAEs有机污染物进行定量分析。结果显示:研究区域水体中的PAEs主要为邻苯二甲酸二乙酯（DEP）、邻苯二甲酸二丁酯（DBP）、邻苯二甲酸二异丁酯（DIBP）、邻苯二甲酸二（2-乙基）己酯（DEHP）；PAEs在丰水期、平水期、枯水期呈现出不稳定状态；研究区水源地水体中PAEs的致癌和非致癌风险值均低于可接受参考值；健康风险评价模型一计算的健康风险值远低于美国环境保护署（USEPA）、国家辐射防护委员会（ICRP）、瑞典环境保护局等机构的推荐值，评价模型二计算的健康风险值与上述机构接近。贵阳市饮用水源地PAEs未对人体造成健康风险或构成致癌风险，水体中PAE的含量与国内部分饮用水源中PAEs的含量基本上处于同一水平。

PHTHALATE ESTERS POLLUTION CHARACTERISTICS AND HEALTH RISK OF DRINKING WATER SOURCES IN GUIYANG

To better understand phthalate esters (PAEs) pollution in key areas of drinking water sources in Guiyang, water samples were collected for content analysis, quantitative analysis of organic pollutants of PAEs in Aha Reservoir, Hongfeng Lake and Baihua Lake Waters by triple quadrupole mass spectrometry (GC/MSMS). Results showed that the PAEs in the water of the study area were mainly DEP,DBP, DIBP, DEHP. PAEs were unstable in the wet season, the flat water period and the dry season; the carcinogenic and non-carcinogenic risk values of PAEs in the water source of the study area were lower than the acceptable reference values; the health risk value calculated by Method I was much lower than the recommended values of the USEPA, ICRP and Swedish EPA, etc. The health risk values calculated by Method II was close to the recommended values of the above-mentioned organizations.The PAEs in the drinking water sources of Guiyang did not pose health risks or cancer risk. The content of PAEs in water was basically at the same level as that of some domestic drinking water sources.