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  • Removal of iodides and bromides at parts per million concentrations using a novel bismuth composite material

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    Embargoed until: 2022-10-21
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    Accepted Manuscript (AM)
    Author(s)
    Nariyan, E
    Aravindakshan, N
    Yu, QJ
    Li, Q
    Griffith University Author(s)
    Li, Qin
    Yu, Jimmy J.
    Nariyan, Elham
    Aravindakshan, Nikhil
    Year published
    2020
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    Abstract
    Iodide and bromide ions in surface and ground waters (typically less than 0.05 mg/L for iodide and 0.5 mg/L for bromide) could react with natural organic matters under oxidative disinfection process and produce toxic disinfectant by-products. Therefore, removal of iodides and bromides in water treatment is desirable for improving drinking water quality. We have synthesized a micro-nano Bi2O3-Bi2S3 composite via a carbogenic sphere-supported synthesis strategy. A hydrothermal processing of sucrose resulted in uniform spherical carbogenic microspheres, which served as an excellent substrate for reaction between Bi(NO3)3 and ...
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    Iodide and bromide ions in surface and ground waters (typically less than 0.05 mg/L for iodide and 0.5 mg/L for bromide) could react with natural organic matters under oxidative disinfection process and produce toxic disinfectant by-products. Therefore, removal of iodides and bromides in water treatment is desirable for improving drinking water quality. We have synthesized a micro-nano Bi2O3-Bi2S3 composite via a carbogenic sphere-supported synthesis strategy. A hydrothermal processing of sucrose resulted in uniform spherical carbogenic microspheres, which served as an excellent substrate for reaction between Bi(NO3)3 and Na2SO4 in emulsion, forming Bi2O3-Bi2(SO4)3 composites, which was then converted into Bi2O3-Bi2S3 after calcination. Using 8 g/L of this material Bi2O3-Bi2S3, 87.69% of iodide at an initial concentration of 0.05 mg/L was removed after 3 h of contact, and 86.38% of bromide at an initial concentration of 0.5 mg/L was removed after 14 h. Such effective removal efficiency was retained when used in artificial groundwater treatment. Overall, this study developed a new method to produce the Bi2O3-Bi2S3 composite in high yield, and the as-synthesized Bi2O3-Bi2S3 composites exhibited high removal efficiencies toward I− and Br− through adsorption mechanism.
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    Journal Title
    Materials Today Sustainability
    Volume
    10
    DOI
    https://doi.org/10.1016/j.mtsust.2020.100054
    Copyright Statement
    © 2020 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Civil Engineering
    Publication URI
    http://hdl.handle.net/10072/400774
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