Catalytic wet air oxidation(CWAO)coupled desalination technology provides a possibility for the effective and economic degradation of high salinity and high organic wastewater.Chloride widely occurs in natural and wastewaters,and its high content jeopardizes the ef-ficacy of Advanced oxidation process(AOPs).Thus,a novel chlorine ion resistant catalyst B-site Ru doped LaFe1-xRuxO3-δin CWAO treatment of chlorine ion wastewater was examined.Especially,LaFe0.85Ru0.15O3-δ was 45.5％better than that of the 6％RuO2@TiO2(commercial carrier)on total organic carbon(TOC)removal.Also,doped catalysts LaFe1-xRuxO3-δ showed better activity than supported catalysts RuO2@LaFeO3 and RuO2@TiO2 with the same Ru content.Moreover,LaFe0.85Ru0.15O3-δ has novel chlorine ion resistance no matter the con-centration of Cl-and no Ru dissolves after the reaction.X-ray diffraction(XRD)refinement,X-ray photoelectron spectroscopy(XPS),transmission electron microscope(TEM),and X-ray absorption fine structure(XAFS)measurements verified the structure of LaFe0.85Ru0.15O3-δ.Kinetic data and density functional theory(DFT)proved that Fe is the site of acetic acid oxidation and adsorption of chloride ions.The existence of Fe in LaFe0.85Ru0.15O3-δ could adsorb chlorine ion(catalytic activity inhibitor),which can protect the Ru site and other ac-tive oxygen species to exert catalytic activity.This work is essential for the development of chloride-resistant catalyst in CWAO.

Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology,College of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;University of Chinese Academy of Sciences,Beijing 100049,China

[1]Wenjing Sun;Hongxia Lu;Lei Ma;Xiangdong Tan;Chengyu Jin;Huiling Wu;Lili Chen;Mengyang Liu;Huangzhao Wei;Chenglin Sun-.Use of catalytic wet air oxidation(CWAO)for pretreatment of high-salinity high-organic wastewater)[J].环境科学学报（英文版）,2022(10):105-114

LaFe1,xRuxO3,85Ru0,15O3

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