摘要
以废弃茶叶中的螺旋导管为原料,成功制备出一种多孔螺旋碳纤维气凝胶(PSCFAs)吸附剂,考察了KOH浓度、活化温度和活化时间等对PSCFAs孔结构和吸附亚甲基蓝(MB)性能的影响,并探究了PSCFAs对水中污染物MB的吸附动力学、等温吸附模型、最佳吸附浓度和循环稳定性。研究表明,活化剂的浓度为1 M、温度为700℃、活化时间为1 h时获得的PSCFAs样品比表面积最大(约为1469.03 m^(2)/g),孔隙总体积最大(0.594 cm^(3)/g),对水中MB的最大吸附浓度高达476 mg/g。PSCFAs对MB的吸附行为符合Langmuir方程(R^(2)=0.99956-0.99972)和二阶动力学模型(R^(2)=0.9987)。
A kind of porous spiral carbon fiber aerogel(PSCFAs)adsorbent was successfully prepared by using spiral tubes from waste tea leaves.The effects of KOH concentration,activation temperature and activation time on the pore structure and methylene blue adsorption performance of PSCFAs were researched.The adsorption kinetics,isothermal adsorption model,optimal adsorption concentration and cyclic stability of methylene blue(MB)on PSCFAs were researched.The results showed that when the activator concentration was 1 M,the temperature was 700℃and the activation time was 1h,the specific surface area of PSCFAs sample was the largest(about 1469.03 m^(2)/g),the total pore volume was the largest(0.594 cm^(3)/g),and the maximum adsorption concentration of methylene blue in water was up to 476 mg/g.The adsorption behavior of PSCFAs to methylene blue was consistent with Langmuir equation(R^(2)=0.99956-0.99972)and second-order kinetic model(R^(2)=0.9987).
作者
吴智清
文亚东
曹若昭
刘兴龙
刘浩
陶锋
王志俊
WU Zhiqing;WEN Yadong;CAO Ruozhao;LIU Xinglong;LIU Hao;TAO Feng;WANG Zhijun(School of Materials Science and Engineering,Anhui Polytechnic University,Wuhu 241000,China;Anhui Provincial Laborateory of High Performance Nonferrous Metals Material,Anhui Polytechnic University,Wuhu 241000,China;Vacuum Foundry Division,Hefei Casting&Forging Plant.Anhui Heli Co.,Ltd,Hefei 230601,China)
出处
《安徽工程大学学报》
CAS
2023年第5期1-8,共8页
Journal of Anhui Polytechnic University
基金
安徽高校自然科学研究重大项目(KZ2020ZD37)
安徽省自然科学基金面上项目(2008085ME131)
安徽工程大学校级科研项目(Xjky019201909)。
关键词
亚甲基蓝
多孔螺旋碳纤维气凝胶
吸附容量
生物质碳
methylene blue
porous spiral fiber carbon aerogel
adsorption capacity
biomass carbon
