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

Azzah Nazihah Che Abdul Rahim; Shotaro Yamada; Haruki Bonkohara; Tsuyoshi Imai; Yung-Tse Hung; Izumi Kumakiri

doi:10.3390/ijerph192315736

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

Azzah Nazihah Che Abdul Rahim
, Shotaro Yamada
, Haruki Bonkohara
, Tsuyoshi Imai
, Yung-Tse Hung
, Izumi Kumakiri

Universiti Teknologi MARA
Yamaguchi University

Research output: Contribution to journal › Article › peer-review

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, 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.

Original language	American English
Journal	International Journal of Environmental Research and Public Health, 2022, 19(23)
Volume	19
DOIs	https://doi.org/10.3390/ijerph192315736
State	Published - Nov 26 2022

Keywords

photocatalysis
Ag/TiO2
inorganic salts
immobilization
isoelectric point

Disciplines

Civil and Environmental Engineering

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10.3390/ijerph192315736License: CC BY

Influence of Salts on the Photocatalytic Degradation of Formic AcFinal published version, 2 MBLicense: CC BY

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title = "Influence of Salts on the Photocatalytic Degradation of Formic Acid in Wastewater",

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, 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.",

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T1 - Influence of Salts on the Photocatalytic Degradation of Formic Acid in Wastewater

AU - Che Abdul Rahim, Azzah Nazihah

AU - Yamada, Shotaro

AU - Bonkohara, Haruki

AU - Imai, Tsuyoshi

AU - Hung, Yung-Tse

AU - Kumakiri, Izumi

N1 - Che Abdul Rahim, A.N.; Yamada, S.; Bonkohara, H.; Mestre, S.; Imai, T.; Hung, Y.-T.; Kumakiri, I. Influence of Salts on the Photocatalytic Degradation of Formic Acid in Wastewater. Int. J. Environ. Res. Public Health 2022, 19, 15736. https://doi.org/10.3390/ijerph192315736

PY - 2022/11/26

Y1 - 2022/11/26

N2 - 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.

AB - 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.

KW - photocatalysis

KW - Ag/TiO2

KW - inorganic salts

KW - immobilization

KW - isoelectric point

UR - https://engagedscholarship.csuohio.edu/encee_facpub/435

U2 - 10.3390/ijerph192315736

DO - 10.3390/ijerph192315736

M3 - Article

VL - 19

JO - International Journal of Environmental Research and Public Health, 2022, 19(23)

JF - International Journal of Environmental Research and Public Health, 2022, 19(23)

ER -

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

Abstract

Keywords

Disciplines

Access to Document

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