Adsorption of La3+, Ce3+ from Aqueous Solutions by Bayberry Tannin Grafted Chitosan

2018 2nd International Workshop on Renewable Energy and Development

能源学;经济学

Jing, Ying^1 ; Chen, Yunzhu^1 ; Wang, Xuemei^1 ; Nengzi, Lichao^1

School of Environment and Resource, Xichang University, Xichang

615000, China^1

关键词: Adsorption capacities;    Adsorption kinetics;    Adsorption performance;    Adsorption quantity;    Fourier transform infrared spectrometer;    Optimal conditions;    Pseudo-second-order kinetic models;    Saturation Adsorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/153/2/022017/pdf
DOI  :  10.1088/1755-1315/153/2/022017

来源: IOP

【 摘 要 】

Bayberry tannin grafted with chitosan (CS-BT) had been successfully prepared and their adsorption performance had been studied La3+, Ce3+ rare earth ions aqueous solutions. The as-prepared absorbents were characterized by Fourier transform infrared spectrometer and scanning electron microscopy. The result showed under optimal conditions [T=40°C; C=2.0 g/L; pH=3.0 (La3+), pH=4.0 (Ce3+);] that the saturation adsorption capacities of CS-BT to La3+, Ce3+ were 58.42 mg/g, 800.08 mg/g, respectively, when [T=30 °C; C=1.0 g/L; pH=4.0 (La3+, Ce3+);] the difference of adsorption quantity between La3+ and Ce3+ reach up to 101.5 mg/g by using the absorbent (CS-BT).The adsorbent exhibited better adsorption capacity to Ce3+ than that of La3+. The CS-BT had high adsorption rate and could achieve basic saturated adsorption in about 5 min. It was found that the adsorption kinetics was well described by the adsorption isotherms followed Freundlich (La3+, Ce3+) adsorption model and the pseudo-second order kinetic model. The research indicated CS-BT could be used as the cheaper and friendly absorbent in enrichment and separation of RE3+ in aqueous solution.