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    陈硕

    • 教授   博士生导师   硕士生导师
    • 主要任职:无
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 在职信息:在职
    • 所在单位:环境学院
    • 学科:环境工程 环境科学
    • 办公地点:大连理工大学环境学院B717
    • 联系方式:0411-84706263
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    Construction of a Microchannel Electrochemical Reactor with a Monolithic Porous-Carbon Cathode for Adsorption and Degradation of Organic Pollutants in Several Minutes of Retention Time

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    论文类型:期刊论文

    第一作者:Wang, Chunna

    通讯作者:Yu, HT; Quan, X (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn, Minist Educ, Dalian 116024, Peoples R China.

    合写作者:Kang, Wenda,Quan, Xie,Gu, Yuwei,Wu, Shuai,Yu, Hongtao,Chen, Shuo,Su, Yan,Guo, Yunfei,Wang, Xiaoting,Chen, Hui

    发表时间:2020-02-04

    发表刊物:ENVIRONMENTAL SCIENCE & TECHNOLOGY

    收录刊物:SCIE、EI、PubMed

    卷号:54

    期号:3

    页面范围:1920-1928

    ISSN号:0013-936X

    摘要:A monolithic porous-carbon (MPC) electrode was fabricated to simultaneously intensify mass transfer and enhance reaction activity. The MPC involved channel arrays (about 50 mu m of diameter for each channel) with mesopores and micropores in channel walls. The abundant surface pores may improve the reaction efficiency of the reduction of O-2 to produce H2O2 and center dot OH. The function of channel arrays was to shorten the mass-transfer distance not only from O-2 to the electrode surface but also from pollutants to the electrode surface and center dot OH. A microchannel electrochemical reactor was assembled to evaluate the performance of the MPC cathode. For 20 mg/L of phenol, sulfamethoxazole or atrazine, effluent concentration and total organic carbon (TOC) decreased down to 1.5 and 3 mg/L, respectively, in a retention time of only 100-300 s. Phenol removal was dominated by the MPC cathode, and the contribution of cathodic adsorption, cathodic degradation, and anodic reaction was 46, 33, and 8%, respectively. The proper working potential for the MPC cathode was +0.26 to +0.6 V versus reversible hydrogen electrode; in this potential range, no scaling was observed. For the real surface water (the initial TOC was 41.5 mg/L), TOC in effluent (the retention time was 335 s) was stable at 31.0 mg/L.