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Electrochemical Sulfur Removal at Controlled and Uncontrolled pHs with an Iron Anode

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Abstract

In this study, sulfide removal was carried out in the Electrocoagulation process under controlled and uncontrolled pH conditions. Under optimum conditions, electrocoagulation took place in less than 40 minutes at uncontrolled pH and less than 30 minutes at controlled pH to reduce the sulfite concentration of the effluent below 0.5 mg/L. The reaction rate constant and iron-sulfide molar ratio for sulfide removal were 14.09 × 10–2 min–1 and 0.97 mol/mol, respectively; under uncontrolled pH conditions, they were 22.88 × 10–2 and 0.97 mol/mol at controlled pH. The mg sulfide removed per g Fe was calculated as 654.0 mg S2–/g Fe at uncontrolled pH and 508.46 mg S2–/g Fe at controlled pH. The operating costs for uncontrolled and controlled pH conditions were also calculated as 2.063 $/m3 (0.747 $/kg S) and 0.842 $/m3 (0.628 $/kg S), respectively. Controlled pH conditions were important in sulfide removal by the Electrocoagulation process.

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This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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Authors and Affiliations

  1. Department of Environmental Engineering, Kyrgyz-Turkish Manas University, 720038, Bishkek, Kyrgyzstan

    Nurzat Shaikieva, Mustafa Dolaz, Zarlık Maimekov & Mehmet Kobya

  2. Department of Environmental Engineering, Kahramanmaras Sutcu Imam University, 460100, Kahramanmaras, Turkey

    Mustafa Dolaz

  3. Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey

    Mehmet Kobya

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  1. Nurzat Shaikieva
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Shaikieva, N., Dolaz, M., Maimekov, Z. et al. Electrochemical Sulfur Removal at Controlled and Uncontrolled pHs with an Iron Anode. Theor Found Chem Eng 57, 1444–1454 (2023). https://doi.org/10.1134/S0040579523060180

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