首页|螺旋藻粉生物质回收稀土元素Yb(Ⅲ):吸附等温线、动力学和热力学

螺旋藻粉生物质回收稀土元素Yb(Ⅲ):吸附等温线、动力学和热力学

Recovery of rare earth element ytterbium(Ⅲ) by dried powdered biomass of spirulina: Adsorption isotherm, kinetic and thermodynamic study

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研究以螺旋藻粉作为吸附剂从废水溶液中回收Yb(Ⅲ)的吸附特性和机理.利用SEM和XPS对吸附剂的表面结构以及元素价态进行分析,探究螺旋藻粉对Yb(Ⅲ)的吸附机理;通过吸附等温线、动力学和热力学模型分析螺旋藻粉对Yb(Ⅲ)的吸附特性.Langmuir模型表明,当温度为318 K时,螺旋藻粉对Yb(Ⅲ)的最大吸附量为72.46 mg/g.动力学实验结果表明,拟二级动力学模型能较好地模拟螺旋藻粉对Yb(Ⅲ)的吸附过程,化学吸附为螺旋藻粉吸附Yb(Ⅲ)的控速步骤.吸附-脱附循环实验结果表明,螺旋藻粉具有良好的稳定性和重复使用性,是一种高效且经济的Yb(Ⅲ)回收材料.
The adsorption characteristics and mechanisms of spirulina powder were investigated when it was used as adsorbent to recover ytterbium(Ⅲ) from wastewater solution. Surface structure and element valence of the adsorbent were analyzed by SEM and XPS for the exploring of its adsorption mechanism for ytterbium(Ⅲ). The adsorption characteristics of ytterbium(Ⅲ) on spirulina powder was analyzed through assessing adsorption isotherm, kinetics and thermodynamic models. The adsorption isotherm data were best explained by Langmuir model, and the adsorption capacity of spirulina powder for ytterbium(Ⅲ) was 72.46 mg/g when adsorption temperature was 318 K. The kinetic experiment results showed that the pseudo-second order kinetic model can better simulate the adsorption process of spirulina powder to ytterbium(Ⅲ), indicating that the rate-controlling step was chemical adsorption. Spirulina can be an efficient and economical ytterbium(Ⅲ) recycling material, because it showed good adsorption stability and reusability from the adsorption-desorption cycle experiment results.

spirulinaytterbium(Ⅲ)adsorptionthermodynamicskinetics

舒庆、廖春发、邹文强、许宝泉、谭育慧

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江西理工大学 材料冶金化学学部,赣州 341000

螺旋藻粉 Yb(Ⅲ) 吸附 热力学 动力学

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaProgram of Qingjiang Excellent Young Talents for the Jiangxi University of Science and Technology,China

2176600921761013

2021

10.1016/S1003-6326(21)65566-8

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(4)
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