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Oxygen vacancies enhanced natural manganese sand activation by PMS for CBZ degradation: Intermediate toxicity and DFT calculations
Liu, Weibao1; Yang, Ying1; Li, Yunhe1; Zhou, Yuerong1; Wang, Ce1; Zhou, Yingtang3; Shang, Jiangwei1,2; Cheng, Xiuwen1,2
2024-01-15
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY   Impact Factor & Quartile
ISSN1383-5866
EISSN1873-3794
Volume329
page numbers13
Abstract

The preparation of sulfate-based advanced oxidation catalysts is usually both complex and expensive. In this study, natural manganese sand enriched with oxygen vacancies was prepared by NaBH4 reduction of natural manganese sand for activating peroxymonosulfate (PMS) to remove carbamazepine (CBZ). 70% of carbamazepine was degraded at 120 min when natural manganese sand enriched with oxygen vacancies and PMS were dosed at 0.4 g/L and 0.3 g/L respectively, and the reaction rate constant of the natural manganese sand system with rich oxygen vacancies was 7 times that of the common system. The mineralization of total organic carbon (TOC) reached 41.9%. Combined EPR and radical quenching assays revealed that degradation of pollutants relied on the involvement of free radicals and non-free radicals, in which singlet oxygen was dominant. The XPS results showed that the redox cycles of Fe3+/Fe2+ and Mn4+/Mn3+/Mn2+ promoted the generation of free radicals. Density functional theory results also showed that the energy required for PMS to adsorb on natural manganese sand with many oxygen vacancies was decreased, and the O-O bond was elongated, which was beneficial to the catalytic reaction. According to LC-MS and Fukui function, the degradation route of CBZ was predicted, and the toxicity of the breakdown products was calculated. The research provides a reference for introducing oxygen vacancies in natural catalysts to improve degradation performance for green (source) to green (application).

KeywordNatural Manganese Sand Oxygen Vacancy Carbamazepine Peroxymonosulfate Dft
PublisherELSEVIER
DOI10.1016/j.seppur.2023.125015
Indexed BySCIE
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:001089428600001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/569071
Collection兰州大学
Corresponding AuthorShang, Jiangwei; Cheng, Xiuwen
Affiliation
1.Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Environm Pollut Predict & Control, Lanzhou 730000, Gansu, Peoples R China;
2.Yili Normal Univ, Coll Chem & Environm Sci, Key Lab Pollutant Chem & Environm Treatment, Yining 835000, Peoples R China;
3.Zhejiang Ocean Univ, Marine Sci & Technol Coll, Natl Engn Res Ctr Marine Aquaculture, Zhoushan 316004, Zhejiang, Peoples R China
Recommended Citation
GB/T 7714
Liu, Weibao,Yang, Ying,Li, Yunhe,et al. Oxygen vacancies enhanced natural manganese sand activation by PMS for CBZ degradation: Intermediate toxicity and DFT calculations[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2024,329.
APA Liu, Weibao.,Yang, Ying.,Li, Yunhe.,Zhou, Yuerong.,Wang, Ce.,...&Cheng, Xiuwen.(2024).Oxygen vacancies enhanced natural manganese sand activation by PMS for CBZ degradation: Intermediate toxicity and DFT calculations.SEPARATION AND PURIFICATION TECHNOLOGY,329.
MLA Liu, Weibao,et al."Oxygen vacancies enhanced natural manganese sand activation by PMS for CBZ degradation: Intermediate toxicity and DFT calculations".SEPARATION AND PURIFICATION TECHNOLOGY 329(2024).
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