Enhanced removal of sulfonamide antibiotics from water by phosphogypsum modified biochar composite

作     者：Zonghong Jiang Miao Chen Xinqing Lee Qianwei Feng Ning Cheng Xueyang Zhang Shengsen Wang Bing Wang Zonghong Jiang;Miao Chen;Xinqing Lee;Qianwei Feng;Ning Cheng;Xueyang Zhang;Shengsen Wang;Bing Wang

作者机构：College of Resources and Environmental EngineeringGuizhou UniversityGuiyang 50025China Key Laboratory of Karst Georesources and EnvironmentMinistry of EducationGuiyang 550025China State Key Laboratory of Environmental GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550081China School of Environmental EngineeringXuzhou University of TechnologyXuzhou 221018China College of Environmental Science and EngineeringYangzhou UniversityYangzhou 225127China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第130卷第8期

页      面：174-186页

核心收录：

学科分类：0710[理学-生物学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1002[医学-临床医学] 0907[农学-林学] 07[理学] 1001[医学-基础医学(可授医学、理学学位)] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the Key Project of Science and Technology Department of Guizhou Province(No.ZK(2022)016) the Special Research Fund of Natural Science(Special Post)of Guizhou University(No.(2020)01) the Key Cultivation Program of Guizhou University(No.2019(08)). 

主　　题：Modified biochar Solid waste Antibiotics Phosphogypsum Fixed-bed adsorption 

摘      要：Antibiotic pollution has become a global eco-environmental issue.To reduce sulfonamide antibiotics in water and improve resource utilization of solid wastes,phosphogypsummodified biochar composite(PMBC)was prepared via facile one-step from distillers grains,wood chips,and phosphogypsum.The physicochemical properties of PMBCwere characterized by scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR),Zeta potential,X-ray diffraction(XRD),etc.The influencing factors,adsorption behaviors,and mechanisms of sulfadiazine(SD)and sulfamethazine(SMT)onto PMBC were studied by batch and fixed bed column adsorption experiments.The results showed that the removal rates of SD and SMT increased with the increase of phosphogypsum proportion,while decreased with the increase of solution pH.The maximum adsorption capacities of modified distillers grain and wood chips biochars for SD were 2.98 and 4.18 mg/g,and for SMT were 4.40 and 8.91mg/g,respectively,which was 9.0–22.3 times that of pristine biochar.Fixed bed column results demonstrated that PMBC had good adsorption capacities for SD and SMT.When the solution flow rate was 2.0 mL/min and the dosage of PMBC was 5.0 g,the removal rates of SD and SMT by modified wood chips biochar were both higher than 50%in 4 hr.The main mechanisms of SD and SMT removal by PMBC are hydrogen bonding,π-πdonor-acceptor,electrostatic interaction,and hydrophobic interaction.This study provides an effective method for the removal of antibiotics in water and the resource utilization of phosphogypsum.