|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|
|Source Publication||Separation and Purification Technology
|Abstract||In 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.|
Initial pH value
Persistent organic pollutant (POP)
|EI Accession Number||20204809550161
|EI Keywords||Organic pollutants
|EI Classification Number||531 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
|Corresponding Author||Gou, Jianfeng|
|Affiliation||1.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 Affilication||College of Earth Environmental Sciences
|Corresponding Author Affilication||College of Earth Environmental Sciences
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.
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.
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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