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Activation of persulfate by CuO-sludge-derived carbon dispersed on silicon carbide foams for odorous methyl mercaptan elimination: identification of reactive oxygen species

  • Environmental and Sustainable Chemical Engineering
  • Published:
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Abstract

In this work, sludge-derived carbon (SC) was innovatively integrated with copper oxide (CuO) on macroporous silicon carbide foams to construct a distinctive catalyst (CuO/SC) with strong catalytic activity, which can effectively activate persulfate (PS) for the removal of methyl mercaptan (CH3SH). The structure and morphology of CuO/SC were investigated by means of XRD, SEM, and EDS. The effects of initial pH values, copper contents, PS dosages, and flow rates on CH3SH removal were also investigated. Under optimal condition, more than 90% of CH3SH was removed by CuO/SC-PS combined system within 10-min reaction due to the synergistic function of CuO and SC. More importantly, on the basis of reactive species trapping and ESR spectroscopy, it is revealed that the responsible reactive species for catalytic CH3SH composition were ·SO4−, ·OH, 1O2, and ·O2− in CuO/SC-PS system. Finally, the possible PS activation scheme of CuO/SC samples was proposed.

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Funding

The National Natural Science Foundation of China (No. 51578556, 21673086), Natural Science Foundation of Guangdong Province (No. 2015A030308005), Science and Technology Research Programs of Guangdong Province (No. 2014A020216009) financially supported this work.

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Authors and Affiliations

  1. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China

    Huanjunwa He, Lingling Hu, Jiawei Zeng, Yajing Huang, Chun He, Qing Zhang & Feng Zhang

  2. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510275, China

    Chun He

  3. Key Lab of Technology on Electrochemical Energy Storage and Power Generation in Guangdong Universities, School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China

    Dong Shu

Authors
  1. Huanjunwa He
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  2. Lingling Hu
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  3. Jiawei Zeng
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  4. Yajing Huang
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  5. Chun He
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  6. Qing Zhang
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  7. Feng Zhang
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  8. Dong Shu
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Corresponding authors

Correspondence to Chun He or Dong Shu.

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Responsible editor: Philippe Garrigues

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He, H., Hu, L., Zeng, J. et al. Activation of persulfate by CuO-sludge-derived carbon dispersed on silicon carbide foams for odorous methyl mercaptan elimination: identification of reactive oxygen species. Environ Sci Pollut Res 27, 1224–1233 (2020). https://doi.org/10.1007/s11356-018-3038-3

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  • DOI: https://doi.org/10.1007/s11356-018-3038-3

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