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
发表刊物：ENVIRONMENTAL SCIENCE & TECHNOLOGY
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.