安徽马鞍山市长江漫滩浅层地下水中高浓度氨氮成因探究.

Ammonia nitrogen contamination in groundwater along the Yangtze River in Anhui Province has become increasingly serious. However, the cause of the excessive ammonia nitrogen is not clear, especially the scan data concerning its source. Taking the QY10A monitoring well as an example, the source of ammonia nitrogen was studied using pollutant tracing, water quality detection, leaching tests, and nitrogen isotope analysis. No sources of high concentrations of ammonia nitrogen were identified in the study area. There was no evidence of a close hydraulic relationship between groundwater with high ammonia nitrogen and surface water. Silty clay and the lower gray-black silty clay were the main locations of ammonia nitrogen. Nitrate 8"N and 8"O of groundwater with high ammonia nitrogen originated from NH, in the soil. The findings indicate that the excessive ammonia nitrogen in the QY10A monitoring well was caused by the high content of the primary geological environment. [ABSTRACT FROM AUTHOR]