Catalytic activation of peroxodisulfate using shape-controlled cerium-manganese composite oxide for phenol degradation:Kinetics and degradation pathway investigation  

作　　者：Yanxia Zheng Lixi Yang Chuxin Huang Yuchao Li Cuncun Zuo Tingting Ge Haofei Huang Jiutao An Ming Wang Yansong Zhao 

机构地区：[1]Institute of Clean Chemical Technology,School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo,255000,China [2]Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials,Shandong University of Technology,Zibo,255000 China [3]College of Resources and Environment Engineering,Shandong University of Technology,Zibo,255000,China [4]Department of Safety,Chemistry and Biomedical Laboratory Sciences,Faculty of Engineering and Science,Western Norway University of Applied Sciences(HVL),5063,Bergen,Norway

出　　处：《Journal of Rare Earths》2024年第8期1514-1523,I0004,共11页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (21908132)。

摘　　要：Phenol-containing wastewater is typical organic wastewater,and its treatment is arduous.An advanced method to treat this type of wastewater is persulfate activation.Environmentally friendly ceriummanganese composite oxide materials were synthesized by hydrothermal method and applied to the phenol degradation process.Various ratios of cerium and manganese,as well as the amount of sodium hydroxide,were investigated.The solid solutions of cerium and manganese were formed and confirmed by X-ray diffraction(XRD) and transmission electron microscopy(TEM).H_(2)-temperature programmed reduction(H_(2)-TPR) and X-ray photoelectron spectroscopy(XPS) were utilized to analyze the synergistic effect of cerium and manganese.It is found that there is a transformation between Ce^(4+)/Ce^(3+) and Mn^(2+)/Mn^(3+),which makes the material more trivalent manganese and thereby increases the catalytic activity.The effect of materials in catalyzing phenol degradation by peroxodisulfate(PDS) under various preparation conditions is discussed and high-effciency removal of phenol can be achieved and the removal rate at 180 min is close to 100%.The kinetic of this process was investigated and activation energy of phenol degradation is 62,35 kJ/mol.The degradation pathway of phenol was studied and it is found that PDS can be activated by low metal ions and the OH and SO_(4·)^(-)radicals play crucial roles according to the quenching experiments.

关 键 词：Advanced oxidation process PERSULFATE Mn-Ce solid solution Phenol degradation Rare earths 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学]