Removal of Sulfamethazine by Corn Biochars from Aqueous Solution:Sorption Mechanisms and Efficiency  

作　　者：ZHANG Mo ZHAO Yangguo WANG Jinpeng BAI Jie Li Kuiran 

机构地区：[1]College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China [2]Key Laboratory of Marine Environment and Ecology(Ocean University of China),Ministry of Education,Qingdao 266100,China [3]College of Marine Life Sciences,Ocean University of China,Qingdao 266003,China [4]The People’s Government of Laiwu District,Jinan 271100,China

出　　处：《Journal of Ocean University of China》2021年第3期590-598,共9页中国海洋大学学报（英文版）

基　　金：Funds for the Central Universities of China(No.201964004);the National Natural Science Foundation of China(No.41977315).

摘　　要：Sorption mechanisms of sulfamethazine(SMT)in different pH solutions are complicated.It has not been sufficiently investigated to enhance removal of SMT from alkalescent aqueous solution.In this study,sorption isotherms and kinetics of SMT by corn biochars pyrolyzed at 300℃ and 600℃(300C,600C)under diverse pH conditions were compared.In order to improve the sorption efficiency of SMT from alkalescent aqueous solution,the biochar 300C was modified by acid or base.Different mathematic models were used to describe sorption driving force and sorption process.Results showed that the biochar 300C possessed more amorphous organic carbon and polar functional groups,which led to a higher sorption capacity than biochar 600C.The sorption rate of biochar 300C was greater than 600C under diverse pH as the physisorption of 300C outweighed 600C.The SMT presented stronger hydrophobicity at pH 5 and higher electrostatic repulsion at pH 1 or 8,which resulted in a higher combining capacity of SMT with both biochars at pH 5 than other pH values.In addition,the acid modified biochar had better removal effect on SMT than alkali at pH solution around 8.The research provides a theoretical basis for the removal of SMT from alkalescent aqueous solution.

关 键 词：SULFAMETHAZINE SORPTION mechanisms process MODIFICATION 

分 类 号：X703[环境科学与工程—环境工程]