Application and characterization of grafted polytetrafluoroethylene fiber for enhanced adsorption of Cu(II) in aqueous solutions

作者：Li Jiong-hui; Miao Xi-xi; Chen Xin-yi; Lu Li; Yang Yi; Fu Ya-qin; Xiong Chun-hua^*

来源：Journal of Central South University, 2016, 23(10): 2513-2519.

DOI：10.1007/s11771-016-3311-x

• PTFE
• adsorption
• Cu(II)
• SEM
• EDS

An enhanced adsorption and desorption procedure of Cu(II) onto green synthesized acrylic acid grafted polytetrafluoroethylene fiber (i.e. AA-PTFE) was conducted with various chemical methods. The results show that the optimal adsorption condition is in acetic acid, sodium acetate (HAc-NaAc) buffer solution (pH=6.80) with the initial concentration of 0.2 mg/mL. The process is very fast initially and equilibrium time is 12 h with a high Cu(II) uptake of 112.26 mg/g at 298 K. Various thermodynamic parameters indicate that the adsorption process is spontaneous and endothermic in nature. In the elution test, 2 mol/L HCl solution achieves satisfactory elution rate and shows no significant decrease after 5 adsorption-desorption cycle, which indicates that AA-PTFE can be regenerated and reused, and due to which a reasonable amount of nondegradable polymer material is avoided in industrial use. Finally, PTFE, AA-PTFE fiber, and Cu(II) loaded AA-PTFE fiber were characterized with various techniques, including IR spectroscopic technique, SEM and EDS.

• 出版日期2016-10
• 单位浙江理工大学; 浙江工商大学