Haupert Levi M, Magnuson Matthew L
Oak Ridge Institute for Science and Education Research Program, USEPA, 26 Martin Luther King Dr. West, Cincinnati, OH 45268.
National Homeland Security Research Center, Office of Research and Development, US Environmental Protection Agency, 26 West Martin Luther King Dr., Cincinnati, OH 45268.
J Environ Eng (New York). 2019 Jul 1;145(7). doi: 10.1061/(asce)ee.1943-7870.0001542.
Polymeric materials such as polyethylene are used extensively for indoor drinking water applications. These materials are subject to permeation by organic compounds such as those found in petroleum products and industrial chemicals, which can result in water quality issues with potential health effects. Although flushing is a common decontamination technique, disagreements and knowledge gaps in the scientific literature complicate prediction of how much flushing may be required to address organic contamination incidents. This paper utilizes a numerical solution to the diffusion equation to predict flushing decontamination times for toluene in cross-linked polyethylene tubing. Results suggest that for premise plumbing materials typically used for indoor drinking water applications, contaminated polyethylene tubing can be resistant to decontamination by flushing, possibly requiring days of continuous flushing to achieve contaminant removal to below regulatory levels.
诸如聚乙烯之类的聚合材料被广泛用于室内饮用水应用。这些材料会受到有机化合物的渗透，例如石油产品和工业化学品中发现的那些有机化合物，这可能导致水质问题并产生潜在的健康影响。尽管冲洗是一种常见的去污技术，但科学文献中的分歧和知识空白使预测解决有机污染事件所需的冲洗量变得复杂。本文利用扩散方程的数值解来预测交联聚乙烯管材中甲苯的冲洗去污时间。结果表明，对于通常用于室内饮用水应用的房屋管道材料，受污染的聚乙烯管材可能难以通过冲洗去污，可能需要连续冲洗数天才能将污染物去除至监管水平以下。
