改性钛酸纳米管对锌及共存离子的吸附  

Adsorption of Zinc and Coexisting Ions by Modified Titanate Nanotubes

作　　者：马骏[1] 王雪丽 祁高举 马静慧 周家欢 任宇康 MA Jun;WANG Xue-li;QI Gao-ju;MA Jing-hui;ZHOU Jia-huan;REN Yu-kang(College of Environment and Safety,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学环境与安全学院,太原030024

出　　处：《太原科技大学学报》2020年第5期396-400,共5页Journal of Taiyuan University of Science and Technology

基　　金：山西省回国留学人员科研资助项目(HGKY2019082);山西省自然科学基金(201901D111249);太原科技大学博士科研启动基金(20192012)。

摘　　要：通过一步碱热合成法使用粉末活性炭负载改性钛酸纳米管TNTs@PAC,对锌离子及共存离子的吸附实验,考察材料的吸附性能。结果显示,该材料是由钛酸纳米管附着于活性炭的颗粒表面组成;动力学吸附特征中显示了该材料对锌离子的快速去除并符合准二级动力学模型;在pH=5时,出现最大吸附值,共存离子不影响TNTs@PAC对锌离子的吸附趋势;等温吸附中Langmuir模型更好的描述了等温吸附结果,Zn(Ⅱ)的单层最大饱和吸附量为161.6 mg/g.由此,对单一离子及共存离子高效的吸附性能使TNTs@PAC具备了良好的实际应用价值。In this experiment,TNTs@ PAC was generated by powdered activated carbon loaded on modified titanate nanotubes by one-step alkali-thermal synthesis method,and the adsorption properties of the TNTs@ PAC were investigated by adsorption of zinc ions and coexisting ions. The results show that the TNTs@ PAC is composed of titanate nanotubes attached to the surface of activated carbon particles;the kinetic adsorption characteristics indicate that the material can quickly remove zinc ions,which conforms to the quasi-second-order kinetic model. When pH= 5,the maximum adsorption value appears,but the coexisting ions do not affect the adsorption trend of TNTs@PAC for zinc ions. The Langmuir model can better describe the results of isothermal adsorption,which shows that the maximum adsorption capacity of Zn(Ⅱ) monolayer reaches 161. 6 mg/g. Therefore,TNTs@ PAC has good value in practice due to its highly efficient adsorption for single ions and coexisting ions.

关 键 词：钛酸纳米管 活性炭 Zn(Ⅱ) Pb(Ⅱ) 吸附 

分 类 号：O658.1[理学—分析化学]