La^(3+)@BC500-S_(2)O_(8)^(2−)system for removal of sulfonamide antibiotics in water  

作　　者：Bing Wang Dongsu Bi Juan Wang Hengbo Qiao Yalei Zhang Zheng Shen 

机构地区：[1]School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China [2]State Key Laboratory of Pollution Control and Resources Reuse,Key Laboratory of Yangtze River Water Environment of MOE,National Engineering Research Center of Protected Agriculture,Shanghai Engineering Research Center of Protected Agriculture,Tongji University,Shanghai 200092,China

出　　处：《Journal of Environmental Sciences》2024年第12期140-148,共9页环境科学学报（英文版）

基　　金：supported by the Key Projects of Intergovern-mental International Scientific and Technological Innovation Cooperation(No.2022YFE0120600);the National Natural Sci-ence Foundation of China(Nos.21978224 and U21A20322);the Science and Technology Commission of Shanghai Munic-ipality(Nos.21dz1202400,22dz1208300,and 22dz1209300).

摘　　要：Sulfonamide antibiotics(SAs)widely used have potentially negative effects on human beings and ecosystems.Adsorption and advanced oxidation methods have been exten-sively applied in SAs wastewater treatment.In this study,compared with Al^(3+)@BC500 and Fe^(3+)@BC500,La^(3+)@BC500 for activating persulfate(S2O82−)had the best effect removal per-formance of sulfadiazine(SDZ)and sulfamethoxazole(SMX).Morphology,acidity,oxygen-containing functional groups,and loading of La^(3+)@BC500 were analyzed by techniques,in-cluding EA,BET,XRD,XPS,FT-IR.XRD results show that with the increase of La^(3+)loading,the surface characteristics of biochar gradually changed from CaCO_(3)to LaCO_(3)OH.Through EPR technology,it is proved that LaCO_(3)OH on the surface of La^(3+)@BC500 can not only acti-vate S2O82−to generate SO_(4)^(−)•,but also to produce•OH.In the optimization experiment,the optimal dosage of La^(3+)is between 0.05 and 0.2(mol/L)/g.SDZ had a good removal effect at pH(5-9),but SMX had a good removal effect only at pH=3.Zeta potential also proves that the material is more stable under acidic conditions.The removal process of SDZ is more in accord with pseudo-first-order kinetics(R^(2)=0.9869),while SMX is more in line with pseudo-second order kinetics(R^(2)=0.9926).

关 键 词：SULFADIAZINE SULFAMETHOXAZOLE La^(3+)@BC500 PERSULFATE 

分 类 号：X703[环境科学与工程—环境工程]