Organic Chemical Contaminants in Water System Infrastructure Following Wildfire.
Organic Chemical Contaminants in Water System Infrastructure Following Wildfire.
复制标题
野火后，水系统基础设施中的有机化学污染物。
DOI：
10.1021/acsestwater.1c00401
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发表时间：
2022-02-11
期刊：
影响因子：
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通讯作者：
Chandrasena, R Esala P
中科院分区：
文献类型：
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作者：
Draper, William M;Li, Na;Solomon, Gina M;Heaney, Yvonne C;Crenshaw, Reese B;Hinrichs, Richard L;Chandrasena, R Esala P
近年来，野火摧毁了加利福尼亚的多个住宅社区。在2017年和2018年大火后，在受火影响的地区的公共饮用水系统中发现了高浓度的苯和其他挥发性有机化合物（VOC）。污染的来源和适当的修复是紧急调查的问题。这项研究表征了目标和非目标VOC以及在2018年CAMP FIRE（CA PARADISE，CA）之后，水中从高度污染的服务线中的水中的目标和半挥发性有机化合物（SVOC）。在服务线中鉴定出或暂时鉴定出95种有机化合物。由由聚氯乙烯（PVC），交联聚乙烯（PEX）和高密度聚乙烯（HDPE）制成的饮用水管实验实验室燃烧实验，并使用了文献综述来评估检测到的化学物质的潜在来源。在服务线中，污染物中有32种与PVC热解相关的化合物，以及与聚乙烯热解相关的21个有机化合物。服务线样本还包含55种化合物，与生物质和废料的不受控制燃烧有关。这些发现支持假设，即野火可以通过对塑料管的热损害和烟雾的侵入来污染饮用水系统。水系统中的残留氯消毒剂可修饰观察到的污染物分布。
Wildfires have destroyed multiple residential communities in California in recent years. After fires in 2017 and 2018, high concentrations of benzene and other volatile organic compounds (VOCs) were found in public drinking water systems in fire-affected areas. The sources of the contamination and appropriate remediation have been urgent matters for investigation. This study characterizes target and non-target VOCs and semi volatile organic compounds (SVOCs) in water from a highly contaminated service line after the 2018 Camp Fire (Paradise, CA). Ninety-five organic compounds were identified or tentatively identified in the service line. Laboratory combustion experiments with drinking water pipes made of polyvinyl chloride (PVC), cross-linked polyethylene (PEX) and high-density polyethylene (HDPE) and a review of the literature were used to evaluate potential sources of the detected chemicals. Among the service line contaminants were thirty-two compounds associated with PVC pyrolysis and twenty-eight organic compounds also associated with the pyrolysis of polyethylene. The service line sample also contained fifty-five compounds associated with uncontrolled burning of biomass and waste materials. The findings support hypotheses that wildfires can contaminate drinking water systems both by thermal damage to plastic pipes and intrusion of smoke. Residual chlorine disinfectant in the water system modifies the contaminant distribution observed.