Linear Relationship between Temperature and the Apparent Reaction Rate Constant of Hydroxyl Radical with 4-chlorobenzoic Acid. (4th May 2022)

• Record Type: Journal Article
• Authors: Kawaguchi, Kohei; Hidaka, Taira; Nishimura, Fumitake
• Is Part Of: Ozone: science and engineering. Volume 44:Number 3(2022)
• Page Start: 274
• Page End: 280
• Publication Date: 2022-05-04
• Subjects: Ozone -- advanced oxidation process -- 2-methylpropan-2-ol -- competitive method -- Arrhenius equation -- Rct value; Ozone -- Periodicals; 665.89
• DOI: 10.1080/01919512.2021.2006561
• Languages: English
• ISSNs: 0191-9512

Abstract

ABSTRACT: 4-Chlorobenzoic acid ( p -CBA) is frequently used as a hydroxyl radical (HO·) probe substance in studies of ozonation and advanced oxidation processes. However, the temperature dependence of the reaction between HO· and p -CBA remains unclear. In this context, we identified the relationship between temperature ( T, K) and the apparent second-order reaction rate constant of HO· with p - CBA ( k H O ⋅, p − C B A T, M −1 s −1 ): 10 10 . They were measured by a novel competitive method using 2-methylpropan-2-ol (tert-butyl alcohol) as a reference substance in the range of 1.0–40.0℃. The linear regression equation was more appropriate than the exponential regression equation to express this relationship. More generally, our simulation shows that the linear regression equation can be more accurate than the exponential regression equation to express the relationship between temperature and apparent reaction rate constants of HO.