芳纶纤维/纤维素复合气凝胶的制备及对Pb^(2+)的吸附性能  

Preparation of Aramid Fiber/Cellulose Composite Aerogel and Its Adsorption Performance on Pb^(2+)

作　　者：杨强[1,2] 晏茹[1] 龚伟 樊国栋 崔孝炜[1] YANG Qiang;YAN Ru;GONG Wei;FAN Guodong;CUI Xiaowei(Shaanxi Key Laboratory of Comprehensive Utilization of Tailing Resources,Shangluo University,Shangluo 726000,China;College of Chemistry and Chemical Engineering,Shaanxi University of Science&Technology,Xi an 710021,China)

机构地区：[1]商洛学院,陕西省尾矿资源综合利用重点实验室,陕西商洛726000 [2]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《塑料工业》2023年第12期96-102,共7页China Plastics Industry

基　　金：陕西省自然科学基础研究计划(面上)(2023-JC-YB-108);商洛学院科研启动金(18SKY003);陕西省大学生创新创业训练项目(S202211396037)。

摘　　要：基于质子供体耦合去质子化法对芳纶纤维进行处理,采用溶胶-凝胶法制备了去质子化芳纶纤维改性的纤维素基气凝胶。通过傅里叶红外光谱仪(FTIR)、X射线衍射仪(XRD)、扫描电镜(SEM)对其结构进行了表征,并分析了芳纶纤维质量分数、吸附时间、吸附剂质量、pH值、温度、Pb^(2+)初始浓度对Pb^(2+)吸附性能的影响。结果表明,在芳纶纤维掺杂质量分数50%,吸附时间150 min,吸附剂质量100 mg,pH值=5.0,吸附温度40℃,Pb^(2+)初始浓度0.03 mol/L的条件下,具有最佳的吸附效果,最大吸附量为346.6 mg/g;其次,芳纶纤维/纤维素复合气凝胶的吸附过程符合准二级动力学模型,且经过4次循环使用后,其吸附量仍可达177.7 mg/g,说明复合气凝胶具有良好的循环利用能力。研究结果可为矿区重金属离子废水处理提供理论指导。Aramid fibers was deprotonatied by proton donor coupled deprotonation method.Based on sol-gel method,a deprotonated aramid fiber modified cellulose composite aerogels was prepared,and the chemical structure was characterized by Fourier transformer infrared spectroscopy(FTIR),X-ray diffraction(XRD)and scanning electron microscope(SEM).On this basis,the effects of mass fraction,adsorption time,adsorbent mass,pH,temperature,and initial concentration of aramid fibers/cellulose on the adsorption performance of Pb^(2+) were analyzed.The results show that the optimal adsorption conditions are 50%doping mass fraction,150 min adsorption time,100 mg adsorbent mass,pH=5.0,40 ℃ adsorption temperature,and 0.03 mol/L initial concentration,the maximum adsorption capacity up to 346.6 mg/g.The aramid fiber/cellulose aerogel adsorption process conforms to a quasi-secondary kinetic model.Recyclability experiments show that the adsorption capacity of the composite is 177.7 mg/g when it is used 4 times,which supports that the Aramid fiber/Cellulose aerogel shows good recycle performance.The research results could provide technical support for the treatment of heavy metal ion wastewater in mining areas.

关 键 词：芳纶纤维 纤维素 去质子化 吸附 

分 类 号：TQ235[化学工程—有机化工]