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    Efficient removal of organic and bacterial pollutants by Ag-La0.8Ca0.2Fe0.94O3-δ perovskite via catalytic peroxymonosulfate activation

    Access Status
    Fulltext not available
    Authors
    Chu, Y.
    Tan, X.
    Shen, Zhangfeng
    Liu, Pengyun
    Han, Ning
    Kang, Jian
    Duan, Xiaoguang
    Wang, Shaobin
    Liu, Lihong
    Liu, Shaomin
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Chu, Y. and Tan, X. and Shen, Z. and Liu, P. and Han, N. and Kang, J. and Duan, X. et al. 2018. Efficient removal of organic and bacterial pollutants by Ag-La0.8Ca0.2Fe0.94O3-δ perovskite via catalytic peroxymonosulfate activation. Journal of Hazardous Materials. 356: pp. 53-60.
    Source Title
    Journal of Hazardous Materials
    DOI
    10.1016/j.jhazmat.2018.05.044
    ISSN
    0304-3894
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP150103026
    URI
    http://hdl.handle.net/20.500.11937/68899
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Elsevier B.V. Removal of toxic organics and bacterial disinfection are important tasks in wastewater treatment. Most heavy metal-based catalysts for degradation of aqueous organic pollutants in heterogeneous Fenton-like processes suffer from the toxicity of leached metals. The present work reports environmentally benign systems for both degradation of organics and bacterial disinfection. Calcium substituted LaFeO 3- d perovskite was demonstrated as an efficient catalyst to activate peroxymonosulfate (PMS) for degradation of phenol, methylene blue and rhodamine 6 G. Compared to LaFeO 3- d and nanocrystal Fe 3 O 4 , the lattice oxygen vacancies in B-site cation-deficient perovskite of La 0.8 Ca 0.2 Fe 0.94 O 3 - d (LaCaFeO 3- d ) particles renders this material a greatly improved catalytic performance. Electron paramagnetic resonance (EPR) suggested that both sulfate (SO 4 [rad]–) and hydroxyl radicals ([rad] OH) played critical roles in the advanced oxidation processes. Moreover, silver doped perovskite (Ag-LaCaFeO 3- d )/PMS successfully inhibited the growth of waterborne pathogen Escherichia coli and Methicillin-resistant Staphylococcus aureus (MRSA) at a lower dose than silver ions, proving a synergetic effect between free radicals and Ag + in killing the bacteria. Therefore, Ag-LaCaFeO 3- d /PMS would be promising for practical wastewater treatment.

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