文献类型：期刊文献

英文题名：Degradation of trichloroacetic acid by Fe/Ni bimetallic reactive PMS with hierarchical layered structure

作者：Mu, Guangda[1];Yang, Yuxiang[1];Chang, Ziling[1];Yuan, Hongming[2];Huang, Yan[1];Batool, Irum[1];Liu, Xiangnong[3];Ni, Chaoying[4]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China;[3]Yangzhou Univ, Anal Test Ctr, Yangzhou 225009, Peoples R China;[4]Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA

年份：2024

卷号：248

外文期刊名：ENVIRONMENTAL RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001181805300001)】；

基金：This work was supported by the National Natural Science Foundation of China (20577010, 20971043) , and the Open Project Program of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University.

语种：英文

外文关键词：Hollow mesoporous silicone nanoparticles; Fe/Ni bimetallic; PMS activation; Trichloroacetic acid; Advanced oxidation process; Mechanism of degradation

摘要：Overuse of chlorinated disinfectants leads to a significant accumulation of disinfection by-products. Trichloroacetic acid (TCA) is a typical carcinogenic disinfection by-product. The efficacy of the conventional degradation process is reduced by the complex nature of its structure, causing a yearly increase in its prevalence within the ecological environment and consequent infliction of significant harm. In this paper, TCA was chosen as the research subject, Fe/Ni bimetallic nanoparticles were employed as the reducing catalyst, ZIF-8@HMON as the catalytic carrier combined with Fe/Ni nanoparticles, and peroxymonosulfate (PMS) was introduced to construct the reducing-advanced oxidation synergistic system and investigated the effect of this system on the degradation performance and degradation pathway of TCA. Various characterization techniques, including TEM, SEM, XRD, FT-IR, XPS, BET, were employed to investigate the morphology, element composition and structure of composite materials analysis. Moreover, the conditions for TCA degradation can be optimized by changing the experimental environment. The results showed that 25 mg of composite catalyst (mole ratio Fe: Ni = 1:1) and 10 mg of PMS effectively degraded TCA within 20-80 mg/L range at pH = 3 and 55 C, achieving maximum degradation within 20 min. Finally, the potential pathways of TCA degradation were analyzed using EPR and LC-MS, and the corresponding reaction mechanisms were proposed.