Purification Equipment Research Center

Beijing, China

Purification Equipment Research Center

Beijing, China
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Chen Z.,Tsinghua University | Zhang H.,Tsinghua University | Yang C.,Purification Equipment Research Center | Sun X.,Purification Equipment Research Center | And 4 more authors.
Desalination and Water Treatment | Year: 2013

The effects of ageing and incorporation of ion-exchange membrane on the electrosorption performance of activated carbon (AC) electrodes-based electrosorption modules were investigated. It was found that the surface area of aged electrode decreased while the average pore size increased. In addition, more surface functional groups, especially -COOH groups were created on the electrode surface due to ageing. All these lead to a decrease in the electrosorption capacity and electrosorption rate. Incorporation of ion-exchange membranes can improve the desalination performance of the electrosorption module, especially for the aged electrode. © 2013 Copyright Balaban Desalination Publications.


Chen Z.,University of Science and Technology Beijing | Song C.,University of Science and Technology Beijing | Sun X.,Purification Equipment Research Center | Guo H.,Purification Equipment Research Center | Zhu G.,Purification Equipment Research Center
Desalination | Year: 2011

The electrosorption performance of activated carbon (AC) electrodes with various potentials and concentrations was studied. It was found that electrosorption capacity and rate increased with the increasing of the bias potentials and solution concentrations. Such trend was found to be correlated to the increase of the electrostatic force and the decrease of the electrolyte resistance. The investigation of the electrosorption isotherm showed that the experimental data can be well represented by Langmuir isotherm. And the kinetics analysis indicated that the electrosorption of NaCl onto AC electrodes followed pseudo-first-order kinetics model. © 2010.


Chen Z.,University of Science and Technology Beijing | Sun X.,Purification Equipment Research Center | Guo H.,Purification Equipment Research Center | Song C.,University of Science and Technology Beijing
Advanced Materials Research | Year: 2010

Activated carbon (AC) electrodes to electrosorption NaCl from aqueous solution were modified. The electrodes were characterized using scanning electron micrograph (SEM), nitrogen adsorption and cyclic voltammetry. The electrosorption removal efficiency is improved by 3 M HNO3 modification due to increased hydrophilic groups enhance adsorption of inorganic ion. The electrosorption removal efficiency is decreased by 15 M HNO 3 modification due to the combined effects of increased hydrophilic groups and decreased average pore size. The improvement of electrosorption performance by TiO2 nanoparticles modification due to TiO2 nanoparticles boned with the polar groups works as electrosorption sites with enhanced adsorption strength. The reversal operation mode is better than non-reversal operation mode for electrosorption application. © (2010) Trans Tech Publications, Switzerland.

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