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| 南通市深层地下水中氨氮的影响因素研究 |
| Study on Influencing Factors of Ammonia Nitrogen in Deep Groundwater in Nantong |
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| DOI： |
| 中文关键词: 氨氮 多元线性回归 影响因素 地下水 南通市 |
| 英文关键词: Ammonium nitrogen Multiple linear regression Influencing factor Groundwater Nantong |
| 基金项目:南通市科技基金“基于空间异质性模型的南通市土壤重金属溯源及污染源解析”资助项目（JC2021167） |
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| 中文摘要: |
| 运用相关性分析、因子分析及多元线性回归模型对南通市2020—2021年15个监测井第Ⅲ承压层地下水的监测数据进行分析，研究深层地下水中氨氮的主要影响因素。结果表明，氨氮的主要来源是地下水沉积物中有机质的矿化及一部分工业开采引入的氮污染，地下水的还原性环境是氨氮赋存的主要成因；地下水中As、Fe及总硬度含量的同时增加也能反映氨氮含量的提高；硝态氮（NO-3-N）与NH3-N在深层地下水中是竞争关系，当地下水环境处于还原性时，更易于NH3-N的富集。降低深层地下水中氨氮的主要方法是减少有机污染物输入及还原性废水的入渗。 |
| 英文摘要: |
| Correlation analysis，factor analysis and multiple linear regression model were used to analyze the monitoring data of the third confined water in 15 groundwater monitoring wells in Nantong from 2020 to 2021，the main influencing factors of ammonia nitrogen in deep groundwater were studied. The results showed that the main sources of ammonia nitrogen was the mineralization of organic matter in groundwater deposit and nitrogen pollution introduced by industrial exploitation. The reducing environment of groundwater was the main cause of the existence of ammonia nitrogen. The simultaneous increase of arsenic，iron and total hardness contents in groundwater could also reflect the increase of ammonium nitrogen content. There was a competitive relationship between NO-3-N and NH3-N in deep groundwater. NH3-N was more likely to accumulate when the groundwater was in a reducing environment. The main methods to reduce ammonia nitrogen in deep groundwater were to reduce the input of organic pollutants and the infiltration of reducing wastewater. |
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