内江市城区地下水硝酸盐污染研究

Study on Nitrate Pollution in Groundwater of Neijiang City

采用紫外分光光度法对2007年5月上旬内江城区(东兴区、市中区)的38个具有代表性的地下水水样,进行了硝酸盐的含量分析.结果表明:内江市城区地下水中硝酸盐(NO3-—N)含量较高,平均值为11.28mg/L,有42.10%的地下水超过WHO制定的饮用水标准.由此表明内江市城区大部分区域地下水遭受到硝酸盐污染,局部区域地下水硝酸盐氮污染比较严重,不宜直接饮用.

At the beginning of May, 2007, 38 groundwater samples from Neijiang city （the Dongxing area and city central area） were collected and the nitrate nitrogen was measured using the ultraviolet spectrophotometer method. Theresults showed that the nitrate nitrogen content in groundwater was a little higher with average value 11.28mg/L, and about 42.10% exceeded the criterion of WHO. This indicated that nitrate pollution in ground water of Neijiang city was serious, especially in some areas.