A novel co-catalyzed system between persulfate and chlorite by sonolysis for removing triphenylmethane derivative

作     者：Qihui Xu Haoran Leng Hong You Shutao Wang Haoyang Li Yibo Yu Qihui Xu;Haoran Leng;Hong You;Shutao Wang;Haoyang Li;Yibo Yu

作者机构：State Key Laboratory of Urban Water Resources and EnvironmentHarbin Institute of TechnologyHarbin 150090China School of EnvironmentHarbin Institute of TechnologyHarbin 150090China School of Marine Science and TechnologyHarbin Institute of Technology at WeihaiWeihai 264209China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2022年第34卷第2期

页      面：291-306页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (No. 2019DX08) the Natural Science Foundation of Shandong Province of China (No. ZR2019QEE012)。 

主　　题：Ultrasonic/Persulfate/Chlorite Non-integer kinetics Simulation Degradation mechanism Co-catalysis 

摘      要：Triphenylmethane(tpm) derivatives(e.g. tpm CV) have threatened the safety of the aquatic environment due to the potential toxicity and carcinogenicity. In this study, the novel ultrasonic/persulfate/chlorite(US/S_(2)O_(8)^(2-)/ClO_(2)^(-)) oxidation process was developed for the effective removal of tpm CV in wastewater. The apparent non-integer kinetics( n around 1.20) of tpm CV degradation under different factors( R^(2)_(Adj) 0.990) were investigated, respectively. Inhibiting effects of anions were greater than those of cations(except Fe(Ⅱ/Ⅲ)). The adding of micromolecule organic acids could regulate degradation towards positive direction. The double response surface methodology(RSM) was designed to optimize tpm CV removal process, and the acoustic-piezoelectric interaction was simulated to determine the propagation process of acoustic wave in the reactor. The possible degradation pathway was explored to mainly include carbonylation, carboxylation, and demethylation. The estimated effectivemean temperature at the bubble-water interface was calculated from 721 to 566 K after introducing the ClO_(2)^(-), however, the adsorption or partitioning capacity of tpm CV in the reactive zone was widened from 0.0218 to 0.0982. The proposed co-catalysis of US/S_(2)O_(8)^(2-)/ClO_(2)^(-)was based on the determined active species mainly including ClO_(2), SO_(4)·^(-), and ·OH. Compared with other US-based processes, the operating cost(3.97 $/m^(3)) of US/S_(2)O_(8)^(2-)/ClO_(2)^(-)with the EE/O value(16.8 k Wh/m^(3)) was relatively reduced.