A comparison of various rural wastewater treatment processes for the removal of endocrine-disrupting chemicals (EDCs)
A comparison of various rural wastewater treatment processes for the removal of endocrine-disrupting chemicals (EDCs)
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各种农村废水处理工艺去除内分泌干扰化学物质 (EDC) 的比较
DOI：
10.1016/j.chemosphere.2013.03.019
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发表时间：
2013-08-01
期刊：
影响因子：
8.8
通讯作者：
Nie, Yafeng
中科院分区：
文献类型：
--
作者：
Qing, Zhimin;Dong, Huiyu;Nie, Yafeng
研究了浙江省某县20个农村污水处理厂对雌酮（E1）、17 β-雌二醇（E2）、雌三醇（E3）、17 α-乙炔基雌二醇（EE 2）、双酚A（BPA）和4-壬基酚（NP）等6种内分泌干扰物（EDCs）的去除效果。这些污水处理厂采用了四种处理工艺之一：活性污泥（AS），人工湿地（CW），稳定塘（SP），微动力生物膜反应器（MP）。结果表明，所有六个内分泌干扰物检测废水样品与NP显示最大检测频率（97%）和最大进水浓度（5002 ng L-1）。生物处理后，E2、E3和NP的浓度显著降低，而E1、EE 2和BPA的去除效果因处理工艺和采样季节而异。一般来说，集中式AS过程优于那些分散式过程（即，夏季AS过程对E1、EE 2、NP和BPA的去除率高于冬季（>70%）。在三种分散过程中，SP过程对EDCs的去除有限，尤其是对El、EE 2和BPA的去除率在冬季为18-46%。由于去除不完全，目标内分泌干扰物的总浓度明显增加的混合和下游部分的当地河流接收从一个典型的污水处理厂（实践AS）的污水。这项研究表明，农村污水处理厂的设计和运行应优化，如果要实现有效的去除内分泌干扰物。(C)2013爱思唯尔有限公司保留所有权利。
The removal of six endocrine-disrupting chemicals (EDCs), including estrone (El), 17 beta-estradiol (E2), estriol (E3), 17 alpha-ethinyl estradiol (EE2), bisphenol A (BPA) and 4-nonylphenol (NP), was investigated in 20 rural wastewater treatment facilities (WWTFs) located in a county of Zhejiang Province, China. These WWTFs adopted one of the four treatment processes: activated sludge (AS), constructed wetland (CW), stabilization pond (SP), and micro-power biofilm reactor (MP). Results indicate that all the six EDCs were detected in wastewater samples with NP showing a maximum detection frequency (97%) and a maximum influent concentration (5002 ng L-1). After biological treatment, the concentrations of E2, E3 and NP decreased remarkably, while El, EE2 and BPA exhibited varying removal efficiencies that depended on the specific treatment process and sampling season. In general, the centralized AS process outperformed those decentralized processes (i.e., CW, SP and MP) and a higher removal of El, EE2, NP and BPA in the AS process was observed in summer (>70%) than in winter. Among the three decentralized processes, the removal of EDCs in the SP process was limited, especially for El, EE2 and BPA (18-46%) in winter. Due to an incomplete removal, the total concentration of target EDCs increased obviously in the mixing and downstream sections of a local river receiving the effluent from a typical WWTF (practicing AS). This study reveals that the design and operation of rural WWTFs should be optimized if an effective removal of EDCs is to be achieved. (C) 2013 Elsevier Ltd. All rights reserved.