Cu-Ce@γ-Al2O3臭氧催化剂催化臭氧氧化化学反渗透膜浓缩废水

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Wenquan Sun, Yan Wang, Xingwang Yang, Ziran Wang, Hanqing Zhu, Jun Zhou, Yongjun Sun
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引用次数: 0

摘要

为高效处理化学反渗透(RO)膜浓缩废水,研制了Cu-Ce@γ-Al₂O₃催化剂。系统研究了Cu-Ce@γ-Al₂O₃催化臭氧化的工作条件和反应机理,并探讨了其在化学RO膜浓缩废水催化臭氧化中的应用。采用扫描电子显微镜(SEM)、布鲁诺尔-埃米特-泰勒(BET)分析、x射线衍射(XRD)、x射线光电子能谱(XPS)、x射线荧光(XRF)和傅里叶变换红外(FTIR)对催化剂进行了全面表征,揭示了催化剂的微观结构、元素组成和晶体结构。确定了最佳反应条件:臭氧用量为8 mg/L/min,初始pH为9.0,催化剂填充率为10%,反应器高径比为5:1。在此条件下,催化臭氧氧化的化学需氧量(COD)去除率为63.4%。自由基猝灭实验证实,羟基自由基(·OH)在催化臭氧化体系中起主导作用。动力学分析表明,Cu-Ce@γ-Al₂O₃对化学RO膜浓缩废水的催化臭氧化反应符合二级动力学。利用紫外可见光谱(UV-Vis)和三维荧光光谱进一步分析了废水中有机物的降解机理。此外,还开发了加权秩和比(WRSR)评估模型,以提供对过程性能的综合评估。实践要点:制备了具有优异催化性能的Cu-Ce@γ-Al2O3催化剂。实现了高盐度化学反渗透膜浓缩液的高效催化臭氧氧化。阐明了催化臭氧氧化降解有机污染物的机理。建立了化学反渗透膜精矿催化臭氧化的评价模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Catalytic ozone oxidation of chemical RO membrane concentrate wastewater by a Cu-Ce@γ-Al2O3 ozone catalyst.

A Cu-Ce@γ-Al₂O₃ catalyst was developed for the efficient treatment of chemical reverse osmosis (RO) membrane concentrate wastewater. The working conditions and reaction mechanisms of Cu-Ce@γ-Al₂O₃ catalytic ozonation were systematically investigated, and its application in the catalytic ozonation of chemical RO membrane concentrate wastewater was explored. The catalyst was comprehensively characterized using scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), and Fourier-transform infrared (FTIR) spectroscopy, revealing its microstructure, elemental composition, and crystal structure. The optimal reaction conditions were identified as follows: ozone dosage of 8 mg/L/min, initial pH of 9.0, catalyst filling ratio of 10%, and a reactor height-to-diameter ratio of 5:1. Under these conditions, the catalytic ozonation achieved a chemical oxygen demand (COD) removal rate of 63.4%. Free-radical quenching experiments confirmed that hydroxyl radicals (·OH) played a dominant role in the catalytic ozonation system. Kinetic analysis revealed that the catalytic ozonation of chemical RO membrane concentrate wastewater with Cu-Ce@γ-Al₂O₃ followed second-order kinetics. The degradation mechanisms of organic matter in the wastewater were further analyzed using ultraviolet-visible (UV-Vis) spectroscopy and three-dimensional fluorescence spectroscopy. Additionally, a weighted rank sum ratio (WRSR) evaluation model was developed to provide a comprehensive assessment of the process performance. PRACTITIONER POINTS: Cu-Ce@γ-Al2O3 catalysts with excellent catalytic performance were prepared. Efficient catalytic ozonation of chemical RO membrane concentrate with high salinity was realized. Degradation mechanism of organic pollutants by catalytic ozonation is clarified. Evaluation model for catalytic ozonation of chemical RO membrane concentrate was established.

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来源期刊
Water Environment Research
Water Environment Research 环境科学-工程:环境
CiteScore
6.30
自引率
0.00%
发文量
138
审稿时长
11 months
期刊介绍: Published since 1928, Water Environment Research (WER) is an international multidisciplinary water resource management journal for the dissemination of fundamental and applied research in all scientific and technical areas related to water quality and resource recovery. WER''s goal is to foster communication and interdisciplinary research between water sciences and related fields such as environmental toxicology, agriculture, public and occupational health, microbiology, and ecology. In addition to original research articles, short communications, case studies, reviews, and perspectives are encouraged.
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