吸附
停留时间分布
电化学
化学
动力学
电化学电池
化学工程
水处理
材料科学
色谱法
电极
环境工程
有机化学
矿物学
环境科学
物理化学
工程类
物理
包裹体(矿物)
量子力学
作者
Fadhil M. Mohammed,Edward P.L. Roberts,Anita J. Hill,Andrew K. Campen,N. W. Brown
出处
期刊:Water Research
[Elsevier]
日期:2011-05-01
卷期号:45 (10): 3065-3074
被引量:63
标识
DOI:10.1016/j.watres.2011.03.023
摘要
This study describes a process for water treatment by continuous adsorption and electrochemical regeneration using an air-lift reactor. The process is based on the adsorption of dissolved organic pollutants onto an adsorbent material (a graphite intercalation compound, Nyex®1000) and subsequent electrochemical regeneration of the adsorbent leading to oxidation of the adsorbed pollutant. Batch experiments were carried out to determine the adsorption kinetics and equilibrium isotherm for adsorption of a sample contaminant, the organic dye Acid Violet 17. The adsorbent circulation rate, the residence time distribution (RTD) of the reactor, and treatment by continuous adsorption and electrochemical regeneration were studied to investigate the process performance. The RTD behaviour could be approximated as a continuously stirred tank. It was found that greater than 98% removal could be achieved for continuous treatment by adsorption and electrochemical regeneration for feed concentrations of up to 300 mg L−1. A steady state model has been developed for the process performance, assuming full regeneration of the adsorbent in the electrochemical cell. Experimental data and modelled predictions (using parameters for the adsorbent circulation rate, adsorption kinetics and isotherm obtained experimentally) of the dye removal achieved were found to be in good agreement.
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