Study on Nitrate Pollution in Groundwater and Interannual Change Regulation in Tianjin
Abstract: Nitrate content is an important index to evaluate the quality of groundwater which affects human health di-rectly. As to evaluate the nitrate contamination of groundwater in Tianjin, an eight-year, large-scale investigation and water-sampling analysis on nitrate concentration in Tianjin groundwater was performed from 2005 to 2008. At the same time, the nitrate pollution status and interannual change regulation were studied. The results showed that the average concentration of in groundwater was 6.82 mg/L, and about 14.98% samples exceeded the criterion of WHO drinking water quality, 10.84% samples exceeded the criterion of national drinking water quality. The interannual change of annual average concentration of has showed a trend which decreased firstly and then increased. The annual average concentration of has decreased from 11.88 mg/L in 2005 to 3.59 mg/L in 2007, and then increased to 7.52 mg/L in 2012 gradually. The over standard rate of 10 mg/L, 20 mg/L of different monitoring period and average concentration of of corresponding period were significantly positive correlated. The average concentration of was increased by 1 mg/L, the over standard rate of 10 mg/L, 20 mg/L were increased by 1.9% and 1.67% respectively.
文章引用: 李明悦 , 廉晓娟 , 朱静华 , 高贤彪 (2013) 天津市地下水硝酸盐污染现状与年际变化规律研究。 环境保护前沿， 3， 90-94. doi: 10.12677/AEP.2013.33015
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