摘要
采用湿法纺丝法制得氧化石墨烯/海藻酸钙复合纤维。研究了接触时间、溶液pH值和温度对复合材料吸附亚甲基蓝性能的影响。在室温下,初始质量浓度为80mg/L氧化石墨烯/海藻酸钙复合纤维对亚甲基蓝的吸附量可达114.9mg/g。采用Langmuir和Freun-dlich模型对等温吸附数据进行拟合发现,等温吸附数据更符合Freundlich模型。动力学研究表明吸附过程符合准二级模型。
Graphene oxide/calcium alginate （GO/CA） composite fibers were prepared by wet spinning. Ad- sorption of methylene blue （MB） onto GO/CA composite fibers were studied by investigating the influencing factors such as contact time, pH values, initial concentration of the dye and temperature. The adsorption capacity of MB onto CA/GO fibers could reach 114.90 mg/g at the initial MB concentration of 80 mg/ L and 298 K. Experimental data fit the Freundlich model better than the Langmuir model. Kinetics study showed that adsorption process of MB onto CA/GO fits the pseudo-second-order model. Thermodynamic study revealed that the adsorption reaction was a spontaneous and exothermic process.
出处
《青岛大学学报（自然科学版）》
CAS
2013年第2期51-56,共6页
Journal of Qingdao University(Natural Science Edition)
基金
国家重点基础研究计划"973"项目(批准号:2012CB722705)
青岛市科技发展计划(批准号:12-1-4-2-23-jch)资助
关键词
氧化石墨烯
纤维
亚甲基蓝
吸附
动力学
Graphene oxide
Fibers
Methylene blue
Adsorption
Kinetic
