青岛市农村供水中硝酸盐氮污染状况及健康风险评价

利用2007年9月~2008年8月青岛市农村供水水质监测资料,分析了青岛市农村供水中硝酸盐氮的污染状况,采用躯体毒物质风险评价模型评价了硝酸盐氮对人体健康潜在危害的风险指数。评价结果表明:硝酸盐氮超标区主要分布在部分农业种植区,其中,平度硝酸盐氮超标率高达49.8%;硝酸盐氮的健康风险评价指数介于0.00~8.42,仅平度、莱西、胶州部分乡镇的供水工程中硝酸盐氮的健康风险指数大于1,在不可接受范围内,但这几个乡镇涉及的供水人口较多,约占本次人口调查总数的30%。

Assessment on status of Nitrate pollution in rural water supply of Qingdao and its healthy risk

In accordance with the water quality monitoring data of the rural water supply of Qingdao from September 2007 to August 2008， the status of the Nitrate pollution in the rural water supply of the city is analyzed herein， and then the risk index of the potential hazard from Nitrate pollution on the human health is evaluated with the model for the assessment on the risk from the body toxic substances. The assessment result shows that the regions， in which Nitrate pollution is over the standard， are mainly distributed in a part of agricultural planting areas， for which the over-standard rates of Nitrate pollution are as high as 49.8% with the Nitrate healthy risk evaluating indexes of 0.00~8.42， while only Nitrate healthy risk evaluating indexes exceed 1 within an unacceptable range in the water supply projects of a part of the towns in Pingdu， Laixi and Jiaozhou， however， the population related to the water supply is relatively more and about 30% of the total population therein.