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

Azzah Nazihah Che Abdul Rahim, Shotaro Yamada, Haruki Bonkohara, Sergio Mestre, Tsuyoshi Imai, Yung-Tse Hung and Izumi Kumakiri ()
Additional contact information
Azzah Nazihah Che Abdul Rahim: Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan
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

IJERPH, 2022, vol. 19, issue 23, 1-9

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.

Keywords: photocatalysis; Ag/TiO 2; inorganic salts; immobilization; isoelectric point (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1660-4601/19/23/15736/pdf (application/pdf)
https://www.mdpi.com/1660-4601/19/23/15736/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:19:y:2022:i:23:p:15736-:d:984870

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().