磁性多孔氧化石墨烯的制备及其对典型磺胺类药物的吸附去除  

Preparation of magnetic porous graphene for the adsorption of typical sulfonamides

作　　者：同凡珂 关通 周双喜 王维 TONG Fanke;GUAN Tong;ZHOU Shuangxi;WANG Wei(State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,China;College of Eco-environmental Engineering,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学省部共建三江源生态与高原农牧业国家重点实验室,青海西宁810016 [2]青海大学生态环境工程学院,青海西宁810016

出　　处：《工业水处理》2024年第12期109-117,共9页Industrial Water Treatment

基　　金：青海省基础研究计划项目(2023-ZJ-988Q)。

摘　　要：以四氟对苯二腈(TF)为刚性分子支柱,通过化学插层法制备了多孔氧化石墨烯(GO-TF),并通过机械球磨法将纳米Fe_(3)O_(4)负载到GO-TF上,制备了新型磁性多孔氧化石墨烯(GO-TF/Fe_(3)O_(4))复合材料。研究了磁性GO-TF/Fe_(3)O_(4)对磺胺嘧啶(SD)的吸附性能,采用吸附动力学模型和等温吸附模型研究了GO-TF/Fe_(3)O_(4)对SD的吸附速率和吸附量。与GO去除SD相比,GO-TF/Fe_(3)O_(4)的吸附去除性能显著提高,饱和吸附量达到106.57 mg/g,表明TF支撑GO纳米片形成了新的吸附孔道,并且球磨后纳米Fe_(3)O_(4)成功嵌入GO-TF上形成了新的吸附位点。研究了溶液pH对材料吸附性能的影响,发现低pH有利于SD的吸附。SD在GO-TF/Fe_(3)O_(4)上的吸附主要涉及π-π作用、氢键作用和静电作用。在5个再生循环内表现出对SD较好的重复吸附性能。Novel magnetic porous graphene oxide(GO-TF/Fe_(3)O_(4))composites were prepared by chemically intercalating porous graphene oxide(GO-TF)with tetrafluoroterephthalonitrile(TF)as a rigid molecular backbone and loading nano-Fe_(3)O_(4) onto GO-TF by mechanical ball milling.The adsorption performance of magnetic GO-TF/Fe_(3)O_(4) for sulfadiazine(SD)was investigated by using adsorption kinetic models and isothermal models to study the adsorption rate and adsorption capacity of sulfadiazine(SD)on GO-TF/Fe_(3)O_(4).Compared to the removal of SD by GO,the adsorption removal performance of GO-TF/Fe_(3)O_(4) was significantly improved,and the saturation adsorption capacity reached 106.57 mg/g,which indicated that new adsorption pores were formed by the TF-supported GO nanosheets and new adsorption sites were formed by the successful embedding of nano Fe_(3)O_(4) onto GO-TF after ball milling.The effect of solution pH on the adsorption properties of GO-TF/Fe_(3)O_(4) was also investigated,and it was found that low pH was favorable for SD adsorption.The adsorption of SD on GO-TF/Fe_(3)O_(4) mainly involved π-πinteractions,hydrogen bonding,and electrostatic interactions.Additionally,GO-TF/Fe_(3)O_(4) showed good reuse performance for SD within 5 cycles.

关 键 词：刚性分子 氧化石墨烯 吸附 磁性 磺胺嘧啶 

分 类 号：X703.1[环境科学与工程—环境工程]