Fate of effluent organic matter and DBP precursors in an effluent-dominated river: A case study of wastewater impact on downstream water quality
Fate of effluent organic matter and DBP precursors in an effluent-dominated river: A case study of wastewater impact on downstream water quality
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DOI：
10.1016/j.watres.2009.01.020
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发表时间：
2009-04-01
期刊：
影响因子：
12.8
通讯作者：
Amy, Gary
中科院分区：
文献类型：
--
作者：
Chen, Baiyang;Seong-Nam, Nam;Amy, Gary
在美国西南部以流出物为主的河流中评估了处理后的废水排放对下游水质的影响。对出水有机物（EfOM）和消毒副产物（DBP）前体的归宿和迁移进行了研究。硝化和生物降解是重要的机制。沿江DBP形成势的变化与溶解有机碳（DOC）、有机氮浓度和比紫外吸收度有关。碳的平均氧化态（MOC）沿河流呈下降趋势。MOC的降低与剩余DOC可生物降解性的降低（即可生物降解的DOC/DOC比降低）是平行的。EfOM在废水中和实验室反应器中可生物降解率高达40%，许多DBP前体（如卤乙腈、某些亚硝胺）的浓度降低。另外，三卤甲烷或卤乙酸的DBP产率要么保持不变，要么略有增加，这表明这些前体是顽固性有机物（OM）的一部分。(C) 2009爱思唯尔有限公司版权所有。
The impact of treated wastewater discharges on downstream water quality was evaluated in an effluent-dominated stream in the Southwest USA. The fate and transport of effluent organic matter (EfOM) and disinfection by-product (DBP) precursors was studied. Nitrification and biodegradation were important mechanisms. Changes in DBP formation potential along the river appeared to correlate with dissolved organic carbon (DOC) and organic nitrogen concentrations and specific ultraviolet absorbance. The mean oxidation state of carbon (MOC) decreased in value along the river. MOC decreases paralleled decreases in the biodegradability of residual DOC (i.e., lower biodegradable DOC/DOC ratio). The EfOM was biodegradable by up to 40 percent, both in the stream and in a laboratory reactor, and many DBP precursors (e.g., haloacetonitriles, certain nitrosamines) decreased in concentration. Alternatively, the DBP yields for trihalomethanes or haloacetic acids either remained the same or increased slightly, suggesting that these precursors were part of the recalcitrant organic matter (OM). (C) 2009 Elesevier Ltd. All rights reserved.