37Cl, 15N, 13C isotopic analysis of common agro-chemicals for identifying non-point source agricultural contaminants
37Cl, 15N, 13C isotopic analysis of common agro-chemicals for identifying non-point source agricultural contaminants
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DOI：
10.1016/j.apgeochem.2007.03.049
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发表时间：
2007-07-01
影响因子：
3.4
通讯作者：
Harvey, F. E.
中科院分区：
文献类型：
--
作者：
Annable, W. K.;Frape, S. K.;Harvey, F. E.
分析了市售除草剂的同位素组成，以确定其各自的N-15、C-13和Cl-37特征，目的是开发一种跟踪和识别农业流域非点源污染物的离散工具。结果表明，在所评价的农用化学品中，氯稳定同位素特征值在增量氯-37=-4.55‰到+3.40‰之间，而大多数自然存在的氯稳定同位素特征值，包括道路盐、污水污泥和化肥的特征值，在标准平均海洋氯(SMOC)范围内变化很小，在-2.00‰到+1.00‰之间。氮稳定同位素值的变化范围很大，增量N-15=-10.86‰到+1.44‰，碳稳定同位素分析给出了增量C-13=-37.13‰到-21.35%的观测范围。所分析的一整套农用化学品。当在互相关分析中比较氮、碳和氯的稳定同位素分析时，存在统计上独立的同位素特征，这表明一种新的潜在示踪剂工具，用于识别环境中的除草剂。(C)2007爱思唯尔有限公司。保留所有权利。
The isotopic compositions of commercially available herbicides were analyzed to determine their respective N-15, C-13 and Cl-37 signatures for the purposes of developing a discrete tool for tracing and identifying non-point source contaminants in agricultural watersheds. Findings demonstrate that of the agrochemicals evaluated, chlorine stable isotopes signatures range between delta Cl-37 = -4.55 parts per thousand and +3.40 parts per thousand, whereas most naturally occurring chlorine stable isotopes signatures, including those of road salt, sewage sludge and fertilizers, vary in a narrow range about the Standard Mean Ocean Chloride (SMOC) between -2.00 parts per thousand and +1.00 parts per thousand. Nitrogen stable isotope values varied widely from delta N-15 = -10.86 parts per thousand to +1.44 parts per thousand and carbon stable isotope analysis gave an observed range between delta C-13 = -37.13 parts per thousand and -21.35%. for the entire suite of agro-chemicals analyzed. When nitrogen, carbon and chlorine stable isotope analyses were compared in a cross-correlation analysis, statistically independent isotopic signatures exist suggesting a new potential tracer tool for identifying herbicides in the environment. (C) 2007 Elsevier Ltd. All rights reserved.