Photo-Fenton and modified photo-Fenton at neutral pH for the treatment of emerging contaminants in wastewater treatment plant effluents: A comparison
Photo-Fenton and modified photo-Fenton at neutral pH for the treatment of emerging contaminants in wastewater treatment plant effluents: A comparison
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DOI：
10.1016/j.watres.2012.11.008
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发表时间：
2013-02-01
期刊：
影响因子：
12.8
通讯作者：
Fernandez-Alba, A.
中科院分区：
文献类型：
--
作者：
Klamerth, N.;Malato, S.;Fernandez-Alba, A.
本研究比较了两种不同的太阳能photo-Fenton工艺，传统的photo-Fenton在pH 3和改性photo-Fenton在中性pH值与最小的铁（5毫克L-1）和最小的初始H2 O2（50毫克L-1）浓度的城市污水处理厂的太阳能中试厂的污水中出现的污染物的降解。由于Fe在中性pH下沉淀，因此必须使用能够形成光活性物质、不污染环境或增加毒性的络合剂来将铁保持在溶液中。本研究使用含有超过60种不同污染物的真实的流出物进行，这些污染物在处理过程中通过与混合四极杆/线性离子阱质量分析仪（LC-QTRAP-MS/MS）耦合的液相色谱法以选择反应监测（SRM）模式进行监测。选定的污染物的浓度范围从几纳克L-1到几十μ g L-1。在所有情况下都证明了超过95%的污染物的去除。PH 3的Photo-Fenton提供了最佳的处理时间，但具有必须预先酸化的缺点。最有前途的方法是乙二胺-N，N '-二琥珀酸（EDDS）的光Fenton改性，因为pH保持在中性范围内。(c)2012爱思唯尔有限公司保留所有权利。
This study compares two different solar photo-Fenton processes, conventional photo-Fenton at pH3 and modified photo-Fenton at neutral pH with minimal Fe (5 mg L-1) and minimal initial H2O2 (50 mg L-1) concentrations for the degradation of emerging contaminants in Municipal Wastewater Treatment Plants effluents in solar pilot plant. As Fe precipitates at neutral pH, complexing agents which are able to form photoactive species, do not pollute the environment or increase toxicity have to be used to keep the iron in solution. This study was done using real effluents containing over 60 different contaminants, which were monitored during treatment by liquid chromatography coupled to a hybrid quadrupole/linear ion trap mass analyzer (LC-QTRAP-MS/MS) operating in selected reaction monitoring (SRM) mode. Concentrations of the selected contaminants ranged from a few ng L-1 to tens of mu g L-1. It was demonstrated in all cases the removal of over 95% of the contaminants. Photo-Fenton at pH3 provided the best treatment time, but has the disadvantage that the water must be previously acidified. The most promising process was photo-Fenton modified with Ethylenediamine-N,N'-disuccinic acid (EDDS), as the pH remained in the neutral range. (c) 2012 Elsevier Ltd. All rights reserved.