Conversion of biochar into sulfonate-bearing solid acids used for the hydrolysis of tylosin:the effect of aromaticity and degree of condensation  

作　　者：Qianqian Xie Xiao Yang Binoy Sarkar Xiaomin Dou Piumi Amasha Withana Yong Sik Ok 

机构地区：[1]College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,People’s Republic of China [2]Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,People’s Republic of China [3]Future Industries Institute,University of South Australia,Mawson Lakes,SA 5095,Australia [4]Korea Biochar Research Center,APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological Engineering,Korea University,Seoul 02841,Republic of Korea [5]International ESG Association(IESGA),Seoul 06621,Republic of Korea

出　　处：《Biochar》2023年第1期1514-1526,共13页生物炭（英文）

基　　金：National Natural Science Foundation of China(51978052);State Key Joint Laboratory of Environmental Simulation and Pollution(19K01ESPCR).

摘　　要：In the last few decades,sulfonated carbon materials have garnered significant attention as Brøsted solid acid catalysts.The sulfonation process and catalytic activity of sulfonated biochar can be influenced by the aromaticity and degree of condensation exhibited by biochar.However,the relationships between the aromaticity,sulfonating ability,and resultant catalytic activity are not fully understood.In this study,biochar samples pyrolyzed at 300-650℃ exhibiting different aromaticity and degrees of condensation were sulfonated and employed as sulfonate-bearing solid catalysts for hydrolytically removing tylosin.They exhibited excellent hydrolytic performance and their kinetic constants were positively correlated with the total acidity and negatively correlated with their aromaticity.This study has uncovered the relationship between the structure,properties,sulfonating ability,and subsequent hydrolytic performance of biochar samples.It was observed that the aromaticity of biochar decreased as the pyrolysis temperature increased.Lower pyrolysis temperatures resulted in a reduced degree of condensation,smaller ring size,and an increased number of ring edge sites available for sulfonation,ultimately leading to enhanced catalytic performance.These findings provide valuable insights into the fundamental chemistry behind sulfonation upgrading of biochar,with the aim of developing functional catalysts for mitigating antibiotics in contaminated water.

关 键 词：Biochar upgrading SULFONATION Hydrolytic mitigation Tylosin removal Biochar-based solid acids 

分 类 号：O62[理学—有机化学] X703[理学—化学]