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《Environmental Science and Technology》 2017-04
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Distribution and Its Influence Factors of Weak Acidic Groundwater in South East China

ZHOU Xun;ZHANG Hou-hu;LIU Lin;Ye Yong-hong;China University of Geoscience;Nanjing Center China Geological Survey;Nanjing Institute of Environmental Science,Ministry of Environmental Protection;  
Acidification of groundwater could change the water quality, weaken nitrification in soil and lead to heavy metal pollution in soil and groundwater. Based on the analysis of p H value and the related chemical indexes of 1 861 groundwater samples collected from South East China, the natural distribution characteristics and its influence factors has been discussed. The result showed that the weak acidic groundwater was mainly distributed to the south of N30° 40′. The groundwater p H value has showed negative correlation with the acid rain frequency and positive correlation with the p H value of precipitation. The mainly weak acidic groundwater distribution zone coincides with the acid rain zone. The p H value of groundwater showed positive correlation to TDS, and negative correlations to the percentage of milligram equivalent of Cland the ratio of Al~(3+) and Ca~(2+), which could indicate the softening after the acid rain leaching. The data of typical city with30-year interval confirms the acidification of groundwater. The process of groundwater acidification. This study is extremely important to recognize the distribution characteristic of weak acidic groundwater, the acidification trend of groundwater under the influence of acid rain and the prevention of groundwater pollution caused by acidification.
【Fund】: 国家自然科学基金青年基金(41302209);; 中国地质调查局地质调查项目:“东南地区地下水污染调查与综合评价”(1212011121168)
【CateGory Index】: X523
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