水环境硝酸盐氮污染研究新方法——<sup>15</sup>N和<sup>18</sup>O相关法

周爱国; 陈银琢; 蔡鹤生; 刘存富; 杨琰

Volume 28 Issue 2

Mar. 2003

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Article Navigation > Earth Science > 2003 > 28(2): 219-224

ZHOU Ai-guo, CHEN Yin-zhuo, CAI He-sheng, LIU Cun-fu, YANG Yan, 2003. New Way in NO3--N Contamination Study of Water Environment: Correlative Method of 15N & 18O. Earth Science, 28(2): 219-224.

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ZHOU Ai-guo, CHEN Yin-zhuo, CAI He-sheng, LIU Cun-fu, YANG Yan, 2003. New Way in NO₃^--N Contamination Study of Water Environment: Correlative Method of ¹⁵N & ¹⁸O. Earth Science, 28(2): 219-224.

ZHOU Ai-guo, CHEN Yin-zhuo, CAI He-sheng, LIU Cun-fu, YANG Yan, 2003. New Way in NO3--N Contamination Study of Water Environment: Correlative Method of 15N & 18O. Earth Science, 28(2): 219-224.

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New Way in NO₃^--N Contamination Study of Water Environment: Correlative Method of ¹⁵N & ¹⁸O

Department of Environment & Hydrogeology, Engineering Faculty, China University of Geosciences, Wuhan 430074, China

Received Date: 2002-05-18
Publish Date: 2003-03-25

Abstract

Abstract

During the last 40 years, nitrate has become one of the most common groundwater contaminants. In this paper, the nitrogen isotope rations in NO₃^- have been analyzed by a new sealed-tube combustion technique using CaO for quantitative removal of CO₂ and water. Oxygen isotope analysis in NO₃^- was conducted by using new sealed-tube combustion technique of AgNO₃+C. Extensive NO₃^--N contamination of drinking water in Lin and Anyang district to a level above drinking water limits is a major problem. It is found that the rate of death of esophagus cancer is proportional to the excessive content of NO₃^-, NO₂^-, NH₄⁺ and nitrosamine in drinking water. The study data of δ(¹⁵N) and δ(¹⁸O) show that NO₃^- in drinking water was predominantly derived from manure and fertilizer in this region. The δ(¹⁸O) of groundwater NO₃^- indicated conclusively that no significant denitrification was found in this area. Conversely, the aerobic nitrification pathway from NH₄⁺ to NO₃^- results in one third of the oxygen in the NO₃^- derived from air and two thirds derived from water.
- δ(¹⁵N) and δ(¹⁸O) in NO₃^-,
- NO₃^--N contamination,
- esophagus cancer

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References(25)

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