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Electrosorption of thiocyanate anions on active carbon felt electrode in dilute solution
1Institute of Nuclear Energy and New Energy Technology, Tsinghua University, Beijing 100084, China.
Abstract:
Adsorption and electrosorption of thiocyanate (SCN-) anions on active carbon felt electrodes were measured by UV spectroscopy and cyclic voltammetry to provide more knowledge of the application of electrosorption on high-area carbon material in industrial waste water purification. Positive polarization caused increased adsorption of SCN-. SCN- showed the highest electrosorption capacity at about pH 3. Reversible electrosorption of SCN- to different extents was observed by changing the direction of polarization currents, which is possibly accompanied by the accessible surface area of C-felt being increased by positive polarization and electrochemical oxidation of SCN-. The enhanced capacity for adsorption by positive polarization will improve reuse of active carbon felt.
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