Cu-Mn-MRBC去除水中ENR、STZ及TCH抗生素的性能与机理  

Performance and mechanism of Cu-Mn-MRBC in the removal of ENR,STZ and TCH antibiotics from water

作　　者：董颖虹 李红艳 崔建国 冯坤 李尚明[2] 王芳 DONG Ying-hong;LI Hong-yan;CUI Jian-guo;FENG Kun;LI Shang-ming;WANG Fang(College of Environmental Science and Engineering,Taiyuan University of Technology,Shanxi Municipal Engineering Graduate Education Innovation Center,Jinzhong 030600,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Research Center for Edible Fungi,Biological Institute of Shanxi Province,Taiyuan 030006,China;Shanxi Key Laboratory of Edible Fungi for Loess Plateau,Taigu 030801,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西省市政工程研究生教育创新中心,山西晋中030600 [2]太原理工大学材料科学与工程学院,山西太原030024 [3]山西省生物研究院有限公司食用菌研究中心,山西太原030006 [4]黄土高原食用菌山西省重点实验室,山西太谷030801

出　　处：《中国环境科学》2022年第12期5668-5678,共11页China Environmental Science

基　　金：山西省重点研发计划项目(社会发展领域)(201803D31046);山西省科技成果转化引导专项(201904D131065);吕梁市引进高层次科技人才重点研发项目(2021RC-1-22)。

摘　　要：为研究多种抗生素污染物共存于水体的作用机理,本文以废菌渣(MR)为原料,经炭化制备MR生物炭(MRBC),通过铜锰复合改性合成Cu-Mn-MRBC,对材料进行了SEM、BET、XRD、FTIR、Zeta电位和EA表征分析,研究了其对水中3种抗生素ENR、STZ与TCH分别在单一与混合溶液中的吸附性能.结果表明,相比于单一溶液,混合溶液中竞争吸附的出现增加了对含氧官能团的选择性消耗;对TCH的吸附有促进作用,在混合溶液中去除率为96.50%,对STZ的抑制作用大于ENR,在混合溶液中去除率分别为39.38%和46.13%;吸附过程对pH值的依赖性减小;共存阳离子的存在会影响抗生素的竞争吸附能力.准二级动力学和Freundlich等温模型可更好地描述Cu-Mn-MRBC的吸附过程.吸附主要为静电作用、π-π相互作用、氢键作用和表面络合等共同作用的结果.This study aimed to investigate the mechanism of action of multiple antibiotic pollutants coexisting in water bodies.In this work,MR biochar(MRBC)was obtained through carbonization using waste bacterial residue(MR)as raw material,and Cu-Mn-MRBC was synthesized through the composite modification of both copper and manganese.The materials were characterized and analyzed by SEM,BET,XRD,FTIR,zeta potential,and EA.Furthermore,the adsorption performance of three antibiotics of ENR,STZ and TCH in single and mixed solutions was studied as well.The results show that comparing with single solution,the emergence of competitive adsorption in mixed solutions increases the selective depletion of oxygen-containing functional groups.Moreover,it promotes the adsorption of TCH with the removal rate of 96.50%in the mixed solution,but inhibits STZ more than ENR,with the removal rates in the mixed solution of 39.38%and 46.13%,respectively.Absorption process in the system decreased the pH dependence.The presence of coexisting cations affects the competitive adsorption capacity of antibiotics.Pseudo-second-order kinetic and Freundlich isotherm models can better describe the adsorption process of Cu-Mn-MRBC.The adsorption is mainly the results of electrostatic interaction,π-πinteraction,hydrogen bonding,and surface complexation.

关 键 词：废菌渣生物炭 复合改性 抗生素 竞争吸附 动力学 

分 类 号：X703[环境科学与工程—环境工程]