Enhanced photocatalytic reduction of trichloroacetic acid using F-TiO2 in the presence of methanol: degradation kinetics and byproducts pathway. Issue 11 (2nd September 2022)

• Record Type: Journal Article
• Authors: Massoudinejad, Mohamadreza; Yazdanbakhsh, Ahmadreza; Amini, Mostafa M.; Nourmoradi, Heshmatollah; Keramati, Hassan
• Is Part Of: International journal of environmental analytical chemistry. Volume 102:Issue 11(2022)
• Page Start: 2461
• Page End: 2482
• Publication Date: 2022-09-02
• Subjects: Photocatalytic degradation -- F doped TiO2 -- haloacetic acids (HAAs) -- mineralisation -- energy consumption; Ecology -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental chemistry -- Periodicals; Pollution -- Periodicals; 577.14
• DOI: 10.1080/03067319.2020.1756279
• Languages: English
• ISSNs: 0306-7319

Abstract

ABSTRACT: Trichloroacetic acid (TCAA) is considered as one of the major of water chlorination by-products. The present work demonstrates decomposition, mineralisation and dechlorination of TCAA by photocatalytic reduction using F doped TiO2 . In this regard, the effects of various operational factors including F-TiO2 dose, the initial concentration of TCAA, photo-reaction time and solution pH were examined on the process efficiency. Based on the results, H C O 3 −, P O 4 − 3, S O 4 − 2, C l − and C O 3 − 2, as the common anions in water, had no considerable impact on the TCAA degradation efficiency. Decomposition and mineralisation rate of TCAA by MeOH/UV/F-TiO2 process under the optimum conditions (catalyst dosage of 0.34 g L −1, the contact time of 76 min, TCAA content of 1 mg L −1 and pH of 7.9) were found to be 97.1% and 68%, respectively. The decomposition intermediates of TCAAdetected by LC/MS and LC-MS/MStechniques were non-chlorinated compounds, mainly formic and acetic acids. It can be concluded thatMeOH/UV/F-TiO2 processcan use as low energy and efficiently treatment method for the degradation of TCAA contaminated water and wastewater.