A novel electro-catalytic membrane contactor for improving the efficiency of ozone on wastewater treatment

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	A novel electro-catalytic membrane contactor for improving the efficiency of ozone on wastewater treatment
	Li, Kuiling ; Xu, Lili ; Zhang, Yong ; Cao, Aixin ; Wang, Yujue ; Huang, Haiou ; Wang, Jun
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2019-07-15
卷号	249 页码:316-321
关键词	Mass transfer Advanced oxidation process Hydrophobic membrane Membrane contactor
ISSN号	0926-3373
英文摘要	A novel electro-catalytic membrane contactor was designed to break the two constrains in O-3 wastewater treatment technology simultaneously: the mass transfer of O-3-water and the decomposition rate of O-3 into (OH)-O-center dot. In the electro-catalytic membrane contact ozonation (ECMCO) process, O-2 and O-3, in the gas chamber, diffuse through the hydrophobic membrane into the water phase; O-2 is electro-reduced to H2O2 that catalyzes O-3 producing (OH)-O-center dot to degrade organic compounds rapidly. The removal rate of nitrobenzene (NB) was significantly improved by the combination of membrane contactor and electro-catalytic process. The removal rates of NB in 120 min were 85%, 55% and 23% for ECMCO, membrane contact ozonation and electrolysis, respectively. O-3 concentration and current density had positive effects on the removal of NB, which was related to the accumulated H2O2 concentration in aqueous phase. Gas flow had slight positive effects on NB removal when it was lower than 50 mL/min. The pH of the feed may affect the production and the form of H2O2 and hence the removal of NB. The highest removal rate in 120 min was up to 95.7% at the initial pH of 4.5. Mass transfer and electrolysis are synthetic in ECMCO process. On one hand, the mass transfer of O-3 increased by 2 times due to the electro-catalytic production of H2O2. On the other hand, the existence of O-3 promoted the production of H2O2. ECMCO has great potential on promoting mass transfer and decomposition of O-3 into (OH)-O-center dot for the industrial application of O-3.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42617]
专题	生态环境研究中心_环境水质学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, 18 Shuangqing Rd, Beijing 100085, Peoples R China 3.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Li, Kuiling,Xu, Lili,Zhang, Yong,et al. A novel electro-catalytic membrane contactor for improving the efficiency of ozone on wastewater treatment[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,249:316-321.
APA	Li, Kuiling.,Xu, Lili.,Zhang, Yong.,Cao, Aixin.,Wang, Yujue.,...&Wang, Jun.(2019).A novel electro-catalytic membrane contactor for improving the efficiency of ozone on wastewater treatment.APPLIED CATALYSIS B-ENVIRONMENTAL,249,316-321.
MLA	Li, Kuiling,et al."A novel electro-catalytic membrane contactor for improving the efficiency of ozone on wastewater treatment".APPLIED CATALYSIS B-ENVIRONMENTAL 249(2019):316-321.