Chemiluminescence-assisted study on a peracetic acid-based advanced oxidation process activated with cobalt phosphide.

Autor: Zhang Y; Analytical & Testing Center, Sichuan University, Chengdu, China., Sun M; Analytical & Testing Center, Sichuan University, Chengdu, China., Yuan X; Analytical & Testing Center, Sichuan University, Chengdu, China., Wei C; Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, China., Su Y; Analytical & Testing Center, Sichuan University, Chengdu, China., Lv Y; Analytical & Testing Center, Sichuan University, Chengdu, China.; Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, China.
Jazyk: angličtina
Zdroj: Luminescence : the journal of biological and chemical luminescence [Luminescence] 2023 Aug; Vol. 38 (8), pp. 1422-1430. Date of Electronic Publication: 2023 May 27.
DOI: 10.1002/bio.4513
Abstrakt: In recent years, the elimination of organic pollutants using advanced oxidation processes (AOPs) based on peracetic acid (PAA) has drawn increasing attention due to the high oxidative potential and low byproducts. However, to explore more efficient and stable PAA-based AOPs, there is still great room for study on the activation of PAA and degradation mechanism in the reaction process. In this study, a new PAA-based AOP activated by metal-organic framework-derived cobalt phosphide (CoP) and accompanied by chemiluminescence (CL) behaviour was explored. The CoP/PAA system could efficiently degrade 99.98% of RhB (20 mg L -1 ) within 5 min at pH 7 compared with the conventional Co 3 O 4 /PAA system (merely 17.29%), and the degradation process was matched well with the pseudo-first-order kinetic, and the kinetic constants was ~23.7 times higher than that of Co 3 O 4 (0.546 min -1 for CoP vs. 0.023 min -1 for Co 3 O 4 ). In the CoP/PAA/RhB process, the CL intensity was related to the concentration of 1 O 2 , O 2 •- and acetyl peroxyl radicals [CH 3 C(O)OO• and CH 3 C(O)O•]. Therefore, CL analysis, combined with quenching tests and electron paramagnetic resonance analysis, was used to study the degradation mechanism in detail, and 1 O 2 was confirmed as the dominant contributor for the dye degradation.
(© 2023 John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz: