Cation-π induced surface cleavage of organic pollutants with ⋅OH formation from H2O for water treatment

iScience

John C. Crittenden¹  Han-Qing Yu²  Chun Hu³  Fan Li³  Yaowen Gao³  Tong Li³  Yumeng Wang³  Lai Lyu³  Di Wang³  Lili Zhang⁴ 

[1]Brook Byers Institute for Sustainable Systems, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

[2]CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China

[3]Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China

[4]Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

关键词: Chemistry;    Surface chemistry;    Environmental chemistry;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: High energy consumption is impedimental for eliminating refractory organic pollutants in water by applying advanced oxidation processes (AOPs). Herein, we develop a novel process for destructing these organics in chemical conjuncted Fe0-FeyCz/Fex, graphited ZIF-8, and rGO air-saturated aqueous suspension without additional energy. In this process, a strong Fe-π interaction occurs on the composite surface, causing the surface potential energy ∼310.97 to 663.96 kJ/mol. The electrons for the adsorbed group of pollutants are found to delocalize to around the iron species and could be trapped by O2 in aqueous suspension, producing ⋅OH, H, and adsorbed organic cation radicals, which are hydrolyzed or hydrogenated to intermediate. The target pollutants undergo surface cleavage and convert H2O to ⋅OH, consuming chemical adsorption energy (∼2.852–9.793 kJ/mol), much lower than that of AOPs. Our findings provide a novel technology for water purification and bring new insights into pollutant oxidation chemistry.

【 授权许可】

Unknown