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
• 来源期刊: 环境科学学报（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: Regular articles
• 页码范围: 291-306
• 页数: 16页
• 语种: 英文

摘要

Triphenylmethane (tpm) derivatives (e.g.tpmcv) have threatened the safety of the aquatic environment due to the potential toxicity and carcinogenicity.In this study,the novel ul-trasonic/persulfate/chlorite (US/S2O82-/ClO2-) oxidation process was developed for the ef-fective removal of tpmcv in wastewater.The apparent non-integer kinetics (n around 1.20)of tpmcv degradation under different factors (R2Adj ＞ 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 tpmcv removal pro-cess,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 effective-mean temperature at the bubble-water interface was calculated from 721 to 566 K after introducing the ClO2-,however,the adsorption or partitioning capacity of tpmcv in the reac-tive zone was widened from 0.0218 to 0.0982.The proposed co-catalysis of US/S2O82-/ClO2-was based on the determined active species mainly including ClO2,SO4·-,and · OH.Com-pared with other US-based processes,the operating cost (3.97 $/m3) of US/S2 O82-/ClO2-with the EE/O value (16.8 kWh/m3) was relatively reduced.