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    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, TiO2 membranes and Ag/TiO2 membranes were prepared and used for the decomposition of dissolved formic acid in wastewater. The photochemical deposition of silver on a TiO2 membrane improved the decomposition rate. The rate doubled by depositing ca. 2.5 mg of Ag per 1 g of TiO2. The influence of salinity on formic acid decomposition was studied. The presence of inorganic salts reduced the treatment performance of the TiO2 membranes to half. Ag/TiO2 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.

    Citation

    Azzah Nazihah Che Abdul Rahim, Shotaro Yamada, Haruki Bonkohara, Sergio Mestre, Tsuyoshi Imai, Yung-Tse Hung, Izumi Kumakiri. Influence of Salts on the Photocatalytic Degradation of Formic Acid in Wastewater. International journal of environmental research and public health. 2022 Nov 26;19(23)

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    PMID: 36497814

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