| 西安浐河、灞河硝酸盐氮同位素特征及污染源示踪探讨 |
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| 关键词:δ~（15）N nitrate nitrogen pollution Chanhe River Bahe River |
| 基金项目:国家自然科学基金项目(编号:40673012,40599422) |
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| 摘要: |
| Nitrogen Isotopic Characteristics of Nitrate and Contamination Source Tracing of the Chanhe River and the Bahe River in Xi'an |
| Nitrate is one of the dominant contaminations in rivers.In recent years,some researchers have studied the dominant contaminations in the main rivers of Xi'an City,and found that the nitrate contamination tended to become increasingly heavier.However,the knowledge about the sources of the nitrate contamination in the river remains insufficient.The nitrogen isotope tracing technology has been widely used in the research of the nitrate contamination,this is because different nitrogen sources have different nitrogen isotopic compositions.In this paper,the concentration and nitrogen isotope characteristics of water nitrate from the Chanhe River and the Bahe River around Xi'an City were investigated,and the nitrate potential contamination sources were analyzed.The results show that the δ15N-NO3-values in the headstream of the Chanhe River and the Bahe River are the lowest and attributed to the organic nitrogen from rocks and natural soil,that the higher δ15N values in the middle reaches are caused by the joint action of natural soil,fertilizer and manure,and that the highest δ15N values in the lower reaches of the two rivers result mainly from industrial wastewater,sewage and manure in this area.It is concluded that nitrogen isotope can provide basic information for tracing nitrate sources of the rivers in Xi'an City. |
| XING Meng,Liu Wei-guo.2008.Nitrogen Isotopic Characteristics of Nitrate and Contamination Source Tracing of the Chanhe River and the Bahe River in Xi'an[J].Acta Geoscientica Sinica,29(6):783-789. |
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