| 催化臭氧氧化处理渗滤液RO浓液的氧化特性及光谱分析 |
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| 引用本文： | 张正义,张千,楼紫阳,刘伟,朱宇楠,袁春波,于潇,赵天涛. 催化臭氧氧化处理渗滤液RO浓液的氧化特性及光谱分析[J]. 化工学报, 2021, 72(10): 5362-5371. DOI: 10.11949/0438-1157.20210400 |
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| 作者姓名： | 张正义 张千 楼紫阳 刘伟 朱宇楠 袁春波 于潇 赵天涛 |
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| 作者单位： | 重庆理工大学化学化工学院,重庆400054;上海交通大学环境科学与工程学院,上海200240;上海交通大学重庆研究院,重庆401147;上海交通大学重庆研究院,重庆401147 |
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| 基金项目： | 国家自然科学基金项目(51908099);国家重点研发计划项目(2018YFC1900704);重庆市教委科学技术研究项目(KJQN20201114) |
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| 摘 要： | 腐殖质的去除效率是催化臭氧氧化降解垃圾渗滤液RO浓液中有机物的关键，活性炭负载金属铈催化剂（Ce-AC）催化臭氧氧化可有效提高腐殖质的去除效率。本文通过XRD、SEM和EDS等手段对Ce-AC催化剂进行表征，对比不同催化剂催化臭氧氧化对RO浓液COD去除及可生化性的影响，通过降解产物光谱分析明晰腐殖质的降解机制。结果表明，铈氧化物是以CeO2萤石晶型的形式负载在AC上，负载后的AC比表面积和孔容积减少，平均孔径增加。催化剂Ce-AC对COD和UV254的去除效果最好，为44.7%和67.3%，出水可生化性显著提升，B/C比从0.06提升到0.47。紫外-可见光谱表明，体系代表腐殖质的芳香类化合物降解效率明显；三维荧光光谱表明体系中腐殖质类物质被极大程度地降解，荧光区域积分的结果表明腐殖质类物质的去除效率达到了66.7%；傅里叶红外光谱表明腐殖质类物质被氧化分解成了相对小分子的碳水化合物和有机胺、硫和醇等。
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| 关 键 词： | 活性炭 Ce-AC催化剂 臭氧氧化 渗滤液RO浓液 光谱分析 |
| 收稿时间： | 2021-03-22 |
Oxidation characteristics and spectral analysis of leachate reverse osmosis concentrate by catalytic ozonation |
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| Zhengyi ZHANG,Qian ZHANG,Ziyang LOU,Wei LIU,Yunan ZHU,Chunbo YUAN,Xiao YU,Tiantao ZHAO. Oxidation characteristics and spectral analysis of leachate reverse osmosis concentrate by catalytic ozonation[J]. Journal of Chemical Industry and Engineering(China), 2021, 72(10): 5362-5371. DOI: 10.11949/0438-1157.20210400 |
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| Authors: | Zhengyi ZHANG Qian ZHANG Ziyang LOU Wei LIU Yunan ZHU Chunbo YUAN Xiao YU Tiantao ZHAO |
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| Affiliation: | 1.School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China;2.School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3.Shanghai Jiao Tong University Chongqing Research Institute, Chongqing 401147, China |
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| Abstract: | The removal efficiency of humus is the key to catalytic ozone oxidation to degrade the organic matter in the RO concentrate of landfill leachate. Activated carbon-supported metal cerium catalyst (Ce-AC) catalytic ozone oxidation can effectively improve the removal efficiency of humus. In this paper, the Ce-AC catalyst was characterized by XRD, SEM and EDS. The effects of different catalysts on COD removal and biodegradability of RO concentrate were compared. The degradation mechanism of humus was clarified by analyzing the degradation product spectrum. The results show that cerium oxide is loaded on AC in the form of CeO2 fluorite crystal. After loading, the specific surface area and pore volume of AC decrease, and the average pore diameter increases. Ce-AC had the best removal effect on COD and UV254, which were 44.7% and 67.3%, respectively. The effluent biodegradability was significantly improved, and the B/C ratio was increased from 0.06 to 0.47. UV-Vis spectra showed that the degradation efficiency of aromatic compounds representing humus in the system was obvious. Three-dimensional fluorescence spectroscopy showed that the humic substances in the system were degraded to a large extent. The results of fluorescence region integration showed that the removal efficiency of humic substances reached 66.7%. Fourier transform infrared spectroscopy showed that humic substances were oxidized and decomposed into relatively small molecules of carbohydrates and organic amines, sulfur and alcohols. |
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| Keywords: | activated carbon Ce-AC catalyst ozonation leachate reverse osmosis concentrate spectroscopic analyses |
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