Authors: Jiangnan Tian Ayobami Matthew Olajuyin Tingzhen Mu Maohua Yang Jianmin Xing
Publish Date: 2016/03/02
Volume: 23, Issue: 12, Pages: 11574-11583
Abstract
The electroFenton EF process treatment of 01M rhodamine B RhB solution was studied with different graphite cathode materials and graphite felt GF was selected as a promising material in further investigation Then the degradation performances of gas diffusion electrode GDE and graphite felt GF were compared and GDE was confirmed to be more efficient in RhB removal The operational parameters such as Fe2+ dosage and current density were optimized and comparison among different modified methods—polytetrafluoroethylenecarbon black PTFECB polytetrafluoroethylenecarbon nanotube PTFECNT electrodepositionCB and electrodepositionCNT—showed 9849 RhB removal by PTFECBmodified cathode in 005 M Na2SO4 at a current density of 50 A/m2 and an air flow rate of 1 L/min after 20 min Meanwhile after cathode modified by PTFECB the mineralization efficiency and mineralization current efficiency performed absolutely better than the pristine one Cyclic voltammograms SEM images contact angles and BET surface area were carried out to demonstrate stronger current responses and higher hydrophilicity of GF after modified The value of biochemical oxygen demand/chemical oxygen demand BOD5/COD increased from 0049 to 0331 after 90min treatment suggesting the solution was biodegradable and the modified cathode was confirmed to be stable after ten circle runs Finally a proposed degradation pathway of RhB was put forward
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