文献详情
MnCeOx/diatomite catalyst for persulfate activation to degrade organic pollutants
文献类型：期刊
通讯作者：Zhang, GM (reprint author), Renmin Univ China, Sch Environm & Nat Resource, Beijing 100872, Peoples R China.; Zhou, NY (reprint author), Army Lorange Gist Univ PLA, Dept Mil Installat, Chongqing 401311, Peoples R China.
期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCES影响因子和分区
年：2020
卷：89
页码：206-217
ISSN：1001-0742
关键词：MnCeOx/diatomite; Persulfate; Dyes and pharmaceutical pollutants; Hydroxyl functional group
摘要：Persulfate (PS)-based oxidation technologies are attracting increasing attentions in water treatment due to their high efficiency and stability. In this study, a novel diatomite supported MnCeOx composite (MnCeOx/diatomite) was prepared and characterized for activation of PS to degrade organic pollutants. Results indicated that diatomite not only dispersed MnCeOx and increased the specific surface area of catalyst, but also improved the low-valence metal site (Mn2+ and Ce3+) and reactive oxygen ...More
Persulfate (PS)-based oxidation technologies are attracting increasing attentions in water treatment due to their high efficiency and stability. In this study, a novel diatomite supported MnCeOx composite (MnCeOx/diatomite) was prepared and characterized for activation of PS to degrade organic pollutants. Results indicated that diatomite not only dispersed MnCeOx and increased the specific surface area of catalyst, but also improved the low-valence metal site (Mn2+ and Ce3+) and reactive oxygen species site (eOH) of MnCeOx, thus enhancing the activities of MnCeOx. MnCeOx/diatomite/PS showed high efficiency for multiple dyes and pharmaceutical pollutants. Constant rate (k) of MnCeOx/diatomite (kMnCeO(x)/diatomite) was three times higher than the sum of constant rate of MnCeOx (kMnCeO(x)) and constant rate of diatomite (kdiatomite). In addition, MnCeOx/diatomite showed wide pH application (5-9). Cl- and NO32 had no effect while SO42 and humid acid had slightly negative effects on MnCeOx/diatomite/PS system. Moreover, MnCeOx/diatomite showed good reusability and stability. Mechanism analyses indicated that electron transfer of Mn and Ce attributed to the activation of PS and oxygen to produce free radicals. SO4 center dot-, (OH)-O-center dot and O-2(center dot-) on the surface of catalyst were the main active free radicals to attack pollutants. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. ...Hide

DOI：10.1016/j.jes.2019.09.020
百度学术：MnCeOx/diatomite catalyst for persulfate activation to degrade organic pollutants
语言：外文
基金：National Water Pollution Control and Treatment Science and Technology Major Project [2018ZX07110003]
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