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Influence of Salts on the Photocatalytic Degradation of Formic Acid in Wastewater

Author

Listed:
  • Azzah Nazihah Che Abdul Rahim

    (Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan
    Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia)

  • Shotaro Yamada

    (Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan)

  • Haruki Bonkohara

    (Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan)

  • Sergio Mestre

    (Chemical Engineering Department, University Institute of Ceramic Technology, Universitat Jaume I. Avda, Vicent Sos Baynat, 12071 Castellon, Spain)

  • Tsuyoshi Imai

    (Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan)

  • Yung-Tse Hung

    (Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, OH 44115, USA)

  • Izumi Kumakiri

    (Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan)

Abstract

Conventional wastewater treatment technologies have difficulties in feasibly removing persistent organics. The photocatalytic oxidation of these contaminants offers an economical and environmentally friendly solution. In this study, TiO 2 membranes and Ag/TiO 2 membranes were prepared and used for the decomposition of dissolved formic acid in wastewater. The photochemical deposition of silver on a TiO 2 membrane improved the decomposition rate. The rate doubled by depositing ca. 2.5 mg of Ag per 1 g of TiO 2 . The influence of salinity on formic acid decomposition was studied. The presence of inorganic salts reduced the treatment performance of the TiO 2 membranes to half. Ag/TiO 2 membranes had a larger reduction of ca. 40%. The performance was recovered by washing the membranes with water. The anion adsorption on the membrane surface likely caused the performance reduction.

Suggested Citation

  • Azzah Nazihah Che Abdul Rahim & Shotaro Yamada & Haruki Bonkohara & Sergio Mestre & Tsuyoshi Imai & Yung-Tse Hung & Izumi Kumakiri, 2022. "Influence of Salts on the Photocatalytic Degradation of Formic Acid in Wastewater," IJERPH, MDPI, vol. 19(23), pages 1-9, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:23:p:15736-:d:984870
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