文献类型：期刊文献

英文题名：Electrochemical decrease of sulfide in sewage by pulsed power supply

作者：Lu, Zhihao[1];Tang, Jiali[1,2];de Lourdes Mendoza, Maria;Chang, Dingming[1];Cai, Lankun[1];Zhang, Lehua[1]

机构：[1]E China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Super Polytech Sch Coast ESPOL, Fac Nat Sci & Math, Dept Environm & Chem Sci DCQA, Guayaquil 090112, Ecuador

年份：2015

卷号：745

起止页码：37

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20151300693262);WOS:【SCI-EXPANDED(收录号:WOS:000353860500006)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 20906026) and Shanghai Pujiang Program (Grant No. 09PJ1402900).

语种：英文

外文关键词：Sulfide removal; Pulsed electrochemical process; Sewage; Sulfur deposition; Anodic passivation; Cathodic scaling

摘要：Pulsed electrochemical process was explored to remove sulfide in municipal sewage, which successfully achieved higher removal rate of 93.2% compared with 73.2% by direct current (DC) power supply. The sulfur content on the electrode was 0.21% by pulsed electrochemical process compared with that of 1.05% on anode by DC electrochemical process, indicating that pulsed electrochemical process can inhibit anodic passivation resulting from sulfur deposition compared with DC electrochemical process. Besides, the electrode scaling can also be effectively controlled during pulsed electrochemical process. Moreover, the process optimization was investigated for pulsed electrochemical treatment, which obtained the highest removal rate of 97.8% at pH 7-8, cell voltage of 7 V, duty cycle of 60%, pulse frequency at 1000 Hz and electrode spacing of 2.5-3.0 cm. These results indicate that pulsed electrochemical process is a promising method of efficient and sustainable electrochemical sulfide removal from sewage. (C) 2015 Elsevier B.V. All rights reserved.