Effective peroxydisulfate activation by CQDs-MnFe_(2)O_(4)@ZIF-8 catalyst for complementary degradation of bisphenol A by free radicals and non-radical pathways  

作　　者：Shuo Li Xinran Liu Yongjie Zheng Jun Ma Shijie You Heshan Zheng 

机构地区：[1]College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China [2]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China

出　　处：《Chinese Chemical Letters》2024年第5期371-379,共9页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52270074,52170039 and U22A20241);the National Key Research and Development Plan“Intergovernmental International Science and Technology Innovation Cooperation”(No.2022YFE0135700);the Heilongjiang Provincial Natural Science Foundation of China(No.LH2021E117);the financial support by the University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province(No.UNPYSCT-2020068)。

摘　　要：The present study reported fabrication of novel carbon quantum dots-MnFe_(2)O_(4)@ZIF-8(CQDs-MFO@ZIF-8)by using co-precipitation hydrothermal method for activation of peroxydisulfate(PDS)to degrade bisphenol A(BPA),one of important emerging organic pollutants in water environment.CQDs-MFO@ZIF-8 served as a highly efficient thermal activated PDS catalyst with high catalytic degradation efficiency,reusability and stability.The catalyst achieved almost completely removal of 20.0 mg/L BPA within 5.0 min,and the degradation efficiency remained higher than 83%after 5 consecutive cycles.Free radicals(^(·)OH,SO_(4)^(·-)and^(·)O_(2)^(-))and non-free radicals((1)O_(2))were generated in the thermal PDS-activation system,in which singlet oxygen((1)O_(2))played a dominant role in the degradation of BPA.The potential toxicity of BPA degradation intermediates was analyzed upon the culture of E.coli and Chlorella sorokiniana by using Ecological Structure-Activity Relationship Model(ECOSAR)program.The catalytic performances of BPA degradation by CQDs-MFO@ZIF-8 were evaluated for treatment of different practical water samples to further verify the feasibility of practical applications.This study provides proof-in-concept demonstration of new nanomaterials for enhanced catalytic water decontamination.

关 键 词：Bisphenol A DEGRADATION PEROXYDISULFATE ^(1)O_(2) Toxicity analysis 

分 类 号：TQ426[化学工程]