兰州大学机构库 >资源环境学院
Synthesis of CMK/LDH and CMK/CLDH for sulfamethoxazole degradation by PS activation: A comparative study of characterization and operating parameter, mechanism pathway
Wang, Zhongjuan1; Li, Yunhe1; Shen, Guohua2; Li, Yuanqing1; Zhang, Xinyi1; Gou, JF(苟剑锋)1; Cheng, XW(程修文)1
2021-03-01
Source PublicationSeparation and Purification Technology
ISSN13835866
Volume258
AbstractIn recent decades, persulfate activation technology has been used to degrade persistent organic pollutant. Moreover, both transition metal-based catalyst and metal-free catalyst have become more efficient activator. In this study, Cu-Fe LDH was synthesized and calcined at different temperature to form into metal oxides (CLDH). Then, the CMK/LDH and CMK/CLDH composites were fabricated by co-precipitation and sonic treatment, respectively. Furthermore, the prepared samples were used to activate PS for sulfamethoxazole degradation. Based on the several characterizations and degradation experiments, a comparative study of different catalysts was conducted and the results reached the following factors: i CMK/LDH owned the best capacity of PS activation on sulfamethoxazole decomposition, 84.9% SMX of 25 mg/L was degraded with less dosage of persulfate (0.5 g/L) and catalyst (0.15 g/L) being added. ii CMK/CLDH owned the better adaptability of initial pH value compared with CMK/LDH. Meanwhile, based on scavenger quenching experiment and chronoamperometric, it was speculated that non-radical pathway played more role in CMK/LDH composite/PS/SMX system compare with radical pathway. It was interesting to find that SO4•− were mainly generated by LDH while HO• were mainly produced by CMK part. However, the non-radical pathway for SMX decomposition was only ascribed to the electron bridge effect that the CMK owned. This study might provide a theoretical support for further studies on comparison about LDH and the metal oxides originating from calcination of LDH for PS activation. © 2020 Elsevier B.V.
KeywordCalcination Catalysts Chemical activation Copper alloys Iron alloys Transition metals Comparative studies Initial pH value Metal-based catalysts Metal-free catalysts Operating parameters Persistent organic pollutant (POP) Persulfate activations Sulfamethoxazole
PublisherElsevier B.V.
DOI10.1016/j.seppur.2020.118018
Indexed ByEI
Language英语
EI Accession Number20204809550161
EI KeywordsOrganic pollutants
EI Classification Number531 Metallurgy and Metallography - 544.2 Copper Alloys - 545.2 Iron Alloys - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds
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Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/443802
Collection资源环境学院
Corresponding AuthorGou, Jianfeng
Affiliation1.Key Laboratory of Western China's Environmental Systems (Ministry of Education), Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China;
2.Jiangsu Surveying and Design Institute of Water Resources Co., Ltd, Yangzhou; 225127, China
First Author AffilicationCollege of Earth Environmental Sciences
Corresponding Author AffilicationCollege of Earth Environmental Sciences
Recommended Citation
GB/T 7714
Wang, Zhongjuan,Li, Yunhe,Shen, Guohua,et al. Synthesis of CMK/LDH and CMK/CLDH for sulfamethoxazole degradation by PS activation: A comparative study of characterization and operating parameter, mechanism pathway[J]. Separation and Purification Technology,2021,258.
APA Wang, Zhongjuan.,Li, Yunhe.,Shen, Guohua.,Li, Yuanqing.,Zhang, Xinyi.,...&Cheng, Xiuwen.(2021).Synthesis of CMK/LDH and CMK/CLDH for sulfamethoxazole degradation by PS activation: A comparative study of characterization and operating parameter, mechanism pathway.Separation and Purification Technology,258.
MLA Wang, Zhongjuan,et al."Synthesis of CMK/LDH and CMK/CLDH for sulfamethoxazole degradation by PS activation: A comparative study of characterization and operating parameter, mechanism pathway".Separation and Purification Technology 258(2021).
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