【摘要】 为全面掌握咸阳市地下水饮用水源地的水环境状况,对2011—2017年该市5个地下水饮用水源地的水质进行评价,并利用健康风险评价模型进行健康风险评价。结果表明:1)咸阳市地下水饮用水源地水质均达到GB 14848—2017《地下水质量标准》Ⅲ类水质标准,其中主要污染指标为氨氮和锰; 2)饮用水的健康总风险在4. 5×10-6/a左右,小于国际癌症研究中心推荐的最大可接受风险; 3)致癌物质在总健康风险中占主要地位,对总健康风险的平均贡献为98. 4%,而在致癌物质中,六价铬的贡献为最大; 4)仪器检出限对于健康风险评价具有一定的影响。总体而言,咸阳市地下水饮用水源地水质较好,对人体的潜在风险在可控范围内。更多还原

【Abstract】 To fully grasp the current water environment of groundwater and drinking water sources in Xianyang,water quality of five groundwater and drinking water sources in the city from 2011 to 2017 was assessed,and potential health risk assessment was conducted using health risk assessment model. The results showed that: 1) The water quality of groundwater and drinking water source in Xianyang met the Class Ⅲ water quality standard Standard for Groundwater Quality and the main pollution indicators were ammonia nitrogen and manganese; 2) The total health risk of the drinking water was about 4. 5×10-6/a,which was lower than the maximum acceptable risk recommended by the International Cancer Research Center; 3) In total health risk,carcinogens occupied the key position,whose average contribution to total health risk was 98. 4%,while among the carcinogens hexavalent chromium made the greatest contribution to total health risk; 4) Instrument detection limit was an important factor affecting the health risk assessment. In general,groundwater and drinking water sources in Xianyang had good water quality,and its potential risk to human body was withina controllable range.更多还原