Oxidation characteristics and spectral analysis of leachate reverse osmosis concentrate by catalytic ozonation

被引：0
作者：
Zhang Z. [1 ]
Zhang Q. [1 ]
Lou Z. [2 ,3 ]
Liu W. [3 ]
Zhu Y. [1 ]
Yuan C. [1 ]
Yu X. [1 ]
Zhao T. [1 ]
机构：
[1] School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing
[2] School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai
[3] Shanghai Jiao Tong University Chongqing Research Institute, Chongqing
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 10期
关键词：
Activated carbon; Ce-AC catalyst; Leachate reverse osmosis concentrate; Ozonation; Spectroscopic analyses;
D O I：
10.11949/0438-1157.20210400
中图分类号：
学科分类号：
摘要：
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. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：5362 / 5371
页数：9
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