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 

机构地区：[1]State Key Laboratory of Urban Water Resources and Environment,Harbin Institute of Technology,Harbin 150090,China [2]School of Environment,Harbin Institute of Technology,Harbin 150090,China [3]School of Marine Science and Technology,Harbin Institute of Technology at Weihai,Weihai 264209,China

出　　处：《Journal of Environmental Sciences》2022年第2期291-306,共16页环境科学学报（英文版）

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)。

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.

关 键 词：Ultrasonic/Persulfate/Chlorite Non-integer kinetics Simulation Degradation mechanism CO-CATALYSIS 

分 类 号：X703[环境科学与工程—环境工程]