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Enhanced mineralization of reactive brilliant red X-3B by UV driven photocatalytic membrane contact ozonation
Wang, Zhiyong; Zhang, Yong; Li, Kuiling; Sun, Zhengguang; Wang, Jun
2020-06-05
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume391Pages:1-8
AbstractThe partial oxidation on refractory organics in ozonation process and the poor performance of mass transfer between ozone (O-3) phase and liquid phase by common O-3 distribution techniques inhibit the practical application of O-3. To overcome these defects, hollow fiber membrane was applied in membrane contact ozonation (MCO)-UV process for the reactive brilliant red X-3B (RBRX-3B) degradation. The efficiency of mass transfer was guaranteed due to the enormous gas/liquid contact area supplied in this bubble-less O-3 transfer process. UV photolysis not only significantly improved the O-3 utilization efficiency but also accelerated the mineralization of RBRX-3B by promoting O-3 to decompose to hydroxyl radicals ((OH)-O-center dot). When 15 mg/L of O-3 was supplied at flow rate of 0.2 L/min, and a liquid velocity of 0.453 m/s, the chemical oxygen demand (COD) removal and total organic carbon (TOC) removal reached 90 % and 77 %, respectively. The rate constant for TOC removal in the MCO-UV process (7.89 x 10(-3) min(-1)) was 3.08 and 6.12 times higher than that in MCO and UV photolysis processes, respectively. Furthermore, the mineralization efficiency (Delta COD/Delta O-3 = 0.84 mg/mg) and electrical energy per mass (E-EM = 4.7 kW h/kg) were calculated and these results indicated a promising future for the MCO-UV process.
Department环境水质学国家重点实验室
KeywordHydrophobic membrane Refractory organics Bubble-less mass transfer Advanced oxidation Hydroxyl radical
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/44935
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Wang, Zhiyong,Zhang, Yong,Li, Kuiling,et al. Enhanced mineralization of reactive brilliant red X-3B by UV driven photocatalytic membrane contact ozonation[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,391:1-8.
APA Wang, Zhiyong,Zhang, Yong,Li, Kuiling,Sun, Zhengguang,&Wang, Jun.(2020).Enhanced mineralization of reactive brilliant red X-3B by UV driven photocatalytic membrane contact ozonation.JOURNAL OF HAZARDOUS MATERIALS,391,1-8.
MLA Wang, Zhiyong,et al."Enhanced mineralization of reactive brilliant red X-3B by UV driven photocatalytic membrane contact ozonation".JOURNAL OF HAZARDOUS MATERIALS 391(2020):1-8.
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