Kimbrough David Eugene
Water Quality and Laboratory Supervisor, Castaic Lake Water Agency, Santa Clarita, CA 91350-2173, USA.
Environ Pollut. 2009 Apr;157(4):1310-6. doi: 10.1016/j.envpol.2008.11.043. Epub 2008 Dec 31.
A natural experiment indicated that a link between the presence and concentration of four elements, copper, lead, nickel, and zinc in the influent to two wastewater reclamation plants to the presence and concentrations of the same four elements in the tap water of residential properties. There were 36 populations of results that were assessed for the normality of their distribution, the difference in their median concentrations, the similarity in the ratios of their median concentrations, and the correlations of the concentrations. The results of this study suggest that brass corrosion is the major source of these four elements in the water reclamation plants influent and that there are two distinct populations of brass sources, those in the early stages of dezincification where the release of the non-copper elements is dominant and those in the later stages where the release of copper dominates and the type of brass that is corroding.
一项自然实验表明，两座废水回收厂进水口中铜、铅、镍和锌这四种元素的存在及浓度与住宅自来水里相同四种元素的存在及浓度之间存在关联。对36组结果进行了评估，分析其分布的正态性、中位数浓度差异、中位数浓度比值的相似性以及浓度的相关性。本研究结果表明，黄铜腐蚀是废水回收厂进水中这四种元素的主要来源，并且存在两种不同的黄铜来源群体，一种处于脱锌早期阶段，此时非铜元素的释放占主导；另一种处于后期阶段，此时铜的释放占主导，以及正在被腐蚀的黄铜类型。
