期刊
WATER SCIENCE AND TECHNOLOGY
卷 61, 期 10, 页码 2617-2624出版社
IWA PUBLISHING
DOI: 10.2166/wst.2010.202
关键词
complexed metal removal; complexing agent removal; electrocoagulation/Fenton; metal plating effluent; organic matter removal; stainless steel electrodes
资金
- Istanbul Technical University, Scientific Research Project Foundation
In the present study, the treatment of metal plating wastewater containing complexed metals originating from the nickel and zinc plating process by electrocoagulation (EC) using stainless steel electrodes was explored. In order to improve the organic matter removal efficiency, the effect of H2O2 addition to the electrocoagulation (the combined EC/Fenton process) application was investigated. For this purpose, a wide range of H2O2 concentrations varying between 15 and 230mM was tested. All EC and EC/Fenton processes were performed at an initial pH of 2.6 and at an optimized current density of 22mA/cm(2). Although up to 30mM H2O2 addition improved the EC process performance in terms of organic matter abatement, the highest COD and TOC removal efficiencies were obtained for the combined EC/Fenton process in the presence of 20mM H2O2. Nickel and zinc were completely removed for all runs tested in the present study after pH adjustments. At the optimized operation conditions, the combined EC/Fenton process proved to be an alternative treatment method for the improvement of organic matter reduction as well as complexed metal removal from metal plating industry wastewater.
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