Oregon Department of Environmental Quality, 811 SW Sixth Avenue, Portland, OR 97204-1390, United States.
Sci Total Environ. 2012 Feb 15;417-418:263-72. doi: 10.1016/j.scitotenv.2011.12.028. Epub 2012 Jan 12.
Oregon's Senate Bill 737, enacted in 2007, required the state's 52 largest municipal wastewater treatment plants (WWTP) and water pollution control facilities (WPCF) to collect effluent samples in 2010 and analyze them for persistent organic pollutants. These facilities are located state-wide and represent a variety of treatment types, service population sizes, geographic areas, and flow conditions. Of the 406 chemicals ultimately analyzed, 114 were detected above the level of quantification (LOQ) in at least one sample. Few persistent pollutants were found possibly because of their diversion from effluent via sorption to sludge (solids phase) or high LOQs for certain chemicals. Several pesticides, as well as benzene and phenol degradation products, all previously unreported in effluent, were detected. Ten polychlorinated biphenyls (PCB) congeners were present at low concentrations in ≤ 10 samples, while polychlorinated naphthalenes and dioxins/furans were not detected at all. Twenty-one polybrominated diphenyl ether (PBDE) congeners were found, nine of which have been reported in Osprey eggs in Oregon and Washington. Methylmercury was present in 65% of samples, with average and maximum concentrations of 0.18 and 1.36 ng/L, respectively. Although they are generally assumed to be innocuous by-products of sewage treatment, additional research is needed on potential impacts to aquatic ecosystems of high loadings of coprostanol and cholesterol. These results suggest that effluent, rather than just receiving waters, should itself be analyzed for a wide range of contaminants in order to understand how upstream sources, conveyed through WWTPs and WPCFs, could be impacting aquatic ecosystems.
俄勒冈州的参议院法案 737 于 2007 年颁布，要求该州 52 家最大的城市废水处理厂（WWTP）和水污染控制设施（WPCF）在 2010 年收集废水样本并对其进行持久性有机污染物分析。这些设施分布在全州各地，代表了各种处理类型、服务人口规模、地理区域和流量条件。在最终分析的 406 种化学物质中，有 114 种在至少一个样本中检测到超过定量限（LOQ）。几乎没有发现持久性污染物，这可能是因为它们通过吸附到污泥（固相）或某些化学物质的高 LOQ 从废水中转移。一些农药以及苯和苯酚的降解产物，以前都没有在废水中报告过，也被检测到。十种多氯联苯（PCB）同系物以低浓度存在于≤10 个样本中，而多氯萘和二恶英/呋喃则根本没有检测到。发现了二十一种多溴二苯醚（PBDE）同系物，其中九种已在俄勒冈州和华盛顿州的鹗蛋中报告过。甲基汞存在于 65%的样本中，平均浓度和最大浓度分别为 0.18 和 1.36ng/L。尽管它们通常被认为是污水处理的无害副产品，但仍需要对高负荷的粪甾醇和胆固醇对水生生态系统的潜在影响进行更多研究。这些结果表明，为了了解上游来源通过 WWTP 和 WPCF 的输送如何影响水生生态系统，应该对废水而不仅仅是接收水进行广泛的污染物分析。
