Water self-purification via electron donation effect of emerging contaminants arousing oxygen activation over ordered carbonenhanced CoFe quantum dots  

作　　者：Yuhao Shi Dongxuan Yang Chun Hu Lai Lyu 

机构地区：[1]Institute of Environ.Res.at Greater Bay Area,Key Laboratory forWater Quality and Conservation of the Pearl River Delta,Ministry of Education,Guangzhou University,Guangzhou,510006,China

出　　处：《Environmental Science and Ecotechnology》2024年第4期167-176,共10页环境科学与生态技术（英文）

基　　金：financially supported by the National Natural Science Foundation of China(52350005,52122009,52070046,and 51838005);the Introduced Innovative Research and Development Team Project under the“Pearl River Talent Recruitment Program”of Guangdong Province(2019ZT08L387);Basic and Applied Basic Research Project of Guangzhou(202201020163).

摘　　要：The release of emerging contaminants(ECs)into aquatic environments poses a significant risk to global water security.Advanced oxidation processes(AOPs),while effective in removing ECs,are often resource and energy-intensive.Here,we introduce a novel catalyst,CoFe quantum dots embedded in graphene nanowires(CoFeQds@GN-Nws),synthesized through anaerobic polymerization.It uniquely features electron-rich and electron-poor micro-regions on its surface,enabling a self-purification mechanism in wastewater.This is achieved by harnessing the internal energy of wastewater,particularly the bonding energy of pollutants and dissolved oxygen(DO).It demonstrates exceptional efficiency in removing ECs at ambient temperature and pressure without the need for external oxidants,achieving a removal rate of nearly 100.0%.The catalyst's structure-activity relationship reveals that CoFe quantum dots facilitate an unbalanced electron distribution,forming these micro-regions.This leads to a continuous electrondonation effect,where pollutants are effectively cleaved or oxidized.Concurrently,DO is activated into superoxide anions(O_(2)^(·-)),synergistically aiding in pollutant removal.This approach reduces resource and energy demands typically associated with AOPs,marking a sustainable advancement in wastewater treatment technologies.

关 键 词：Quantum dots Emerging contaminants removal Self-purification system Dissolved oxygen 

分 类 号：X703[环境科学与工程—环境工程]