Constructing Ce-Mn/Al_(2)O_(3)with different active components for low temperature catalytic degradation of chlorobenzene in soil  

作　　者：Tianyu Sun Mutao Xu Xuelu Meng Tiantian Liu Qijie Jin Chengzhang Zhu Haitao Xu 

机构地区：[1]School of Environmental Science and Engineering,Nanjing Tech University,Nanjing,210009,China [2]College of Materials Science and Engineering,Nanjing Tech University,Nanjing,20009,Chin

出　　处：《Journal of Rare Earths》2024年第10期1873-1881,共9页稀土学报（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(2021YFB3500600,2021YFB3500605,2022YFB3504100);Key R&D Program of Jiangsu Province(BE2022142);Natural Science Foundation of Jiangsu Province(BK20220365);Jiangsu International Cooperation Project(BZ2021018);Chunhui Project Foundation of the Education Department of China(202200554)。

摘　　要：Soil remediation containing numerous organic contaminants is of great significance to ecological environment.Herein,the synergetic effects of Ce-Mn/Al_(2)O_(3)with different active components on catalytic thermal desorption of chlorobenzene in soil were investigated.The optimized Ce-Mn/Al_(2)O_(3)drastically enhance the desorption efficiency of chlorobenzene,and the corresponding conversion reaches 100%within 1 h at a low temperature of 120℃.The superior performance is ascribed to the formation of Ce-Mn solid solution during the calcination process,resulting in a certain lattice change to the generation of abundant oxygen vacancies and acidic sites.Combining with the analysis of in-situ diffuse reflectance infrared spectroscopy and gas chromatography-mass spectrometry,the final products of chlorobenzene are decomposed into CO_(2),H_(2)O,Cl_(2)and HCl.This work sheds light on the rational design of highly-active catalysts for practical applications of sustainable soil remediation.

关 键 词：Ce-Mn/Al_(2)O_(3) SOIL Thermal desorption Low temperature Degradation pathway Rare earths 

分 类 号：TQ426[化学工程] X53[环境科学与工程—环境工程]