Identifying sources of subsurface nitrate pollution with stable nitrogen isotopes. Final report, August 1976-March 1978
Identifying sources of subsurface nitrate pollution with stable nitrogen isotopes. Final report, August 1976-March 1978
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用稳定氮同位素识别地下硝酸盐污染源。
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
W. F. Holland
中科院分区：
文献类型：
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作者：
T. Wolterink;H. J. Williamson;D. C. Jones;T. Grimshaw;W. F. Holland
本报告描述了一项确定地下水中硝酸盐来源的技术调查的方法、结果、结论和建议。还提供了对该技术的理论基础的讨论。本研究收集了 300 多个土壤和地下水样本。这些样本来自美国各地的多个地点，代表了各种环境条件。将其中 66 个样品中的硝酸盐与其他氮物质分离、转化为氮气、纯化并分析以确定 (15)N/(14)N 比率。这些数据与 Jones (1) 和 Kreitler (2) 先前进行的分析结果相结合。使用标准统计技术来分析观察到的 δ(15)N 值相对于几种硝酸盐来源和各种环境因素的变化。研究发现，来自饲养场、谷仓和化粪池的硝酸盐可以根据其 delta (15)N 值与天然土壤硝酸盐区分开来。然而，它们不能彼此区分。环境因素导致观察到的 delta (15)N 值变化。
This report describes the methods, results, conclusions, and recommendations of an investigation of a technique to identify sources of nitrate in ground water. A discussion of the theoretical basis of the technique is also provided. Over 300 soil and ground water samples were collected for this study. The samples are from numerous sites around the United States, representing a variety of environmental conditions. The nitrate in 66 of these samples was separated from other nitrogen species, converted to N2 gas, purified, and analyzed to determine the ratio (15)N/(14)N. These data were combined with the results of analyses performed previously by Jones (1) and Kreitler (2). Standard statistical techniques were used to analyze the observed variations in delta (15)N values, with respect to several nitrate sources and various environmental factors. It was found that nitrates from feedlots, barnyards and septic tanks can be distinguished from natural soil nitrates on the basis of their delta (15)N values. They cannot, however, be distinguished from each other. Environmental factors contributed to the observed variation in delta (15)N values.