Catalytic Ozonation of Recalcitrant Organic Chemicals in Water Using Vanadium Oxides Loaded ZSM-5 Zeolites

Frontiers in Chemistry

Qing X. Li¹  Brandon A. Yoza²  Yiming Li³  Yingying Xu³  Chunmao Chen³  Yue Kou³  Yuqi Tang³  Qinghong Wang³  Huangfan Ye³ 

[1] Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, United States;Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI, United States;State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum, Beijing, China;

关键词: ZSM-5 zeolites;    catalytic ozonation;    vanadium loadings;    recalcitrant organic chemicals;    wastewater treatment;   

DOI  :  10.3389/fchem.2019.00384

来源: DOAJ

【 摘 要 】

The discharge of wastewater having recalcitrant chemical compositions can have significant and adverse environmental effects. The present study investigates the application of a catalytic ozonation treatment for the removal of recalcitrant organic chemicals (ROCs) from the water. Novel catalytic materials using vanadium (V) oxides deposited onto the surface of NaZSM-5 zeolites (V/ZSM) were found to be highly efficient for this purpose. The highly-dispersed V oxides (V4+ and V5+) and Si-OH-Al framework structures were determined to promote the surface reaction and generation of hydroxyl radicals. The constructed V1/ZSM450 (0.7 wt% of V loading and 450°C of calcination) exhibited the highest activity among the developed catalyst compositions. The V1/ZSM450-COP increased the mineralization rate of nitrobenzene and benzoic acid by 50 and 41% in comparison to single ozonation. This study demonstrates the enhanced potential of V/ZSM catalysts used with catalytic ozonation process (COP) for the treatment of chemical wastewaters.

【 授权许可】

Unknown