Medium pressure UV combined with chlorine advanced oxidation for trichloroethylene destruction in a model water
Medium pressure UV combined with chlorine advanced oxidation for trichloroethylene destruction in a model water
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DOI：
10.1016/j.watres.2012.06.007
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发表时间：
2012-10-01
期刊：
影响因子：
12.8
通讯作者：
Hofmann, Ron
中科院分区：
文献类型：
--
作者：
Wang, Ding;Bolton, James R.;Hofmann, Ron
在实验室规模的研究中，通过比较在不同pH值下，紫外线（UV）/氯与单独UV和UV/过氧化氢（H2 O2）的降解速率，评价了UV/氯作为一种新型饮用水高级氧化工艺（AOP）的有效性。使用中压汞UV灯。在pH值为5时，UV/Cl_2法比UV/H_2O_2法更有效，但在中性和碱性pH范围内，UV/H_2O_2法更有效。在较高的pH值下，pH效应可能是由OCl-浓度的增加所控制的。紫外/氯处理TCE的机理动力学模型与实验数据吻合良好。(C)2012爱思唯尔有限公司保留所有权利。
The effectiveness of ultraviolet (UV) combined with chlorine as a novel advanced oxidation process (AOP) for drinking water treatment was evaluated in a bench scale study by comparing the rate of trichloroethylene (TCE) decay when using UV/chlorine to the rates of decay by UV alone and UV/hydrogen peroxide (H2O2) at various pH values. A medium pressure mercury UV lamp was used. The UV/chlorine process was more efficient than the UV/H2O2 process at pH 5, but in the neutral and alkaline pH range, the UV/H2O2 process became more efficient. The pH effect was probably controlled by the increasing concentration of OCl- at higher pH values. A mechanistic kinetic model of the UV/chlorine treatment of TCE showed good agreement with the experimental data. (C) 2012 Elsevier Ltd. All rights reserved.