Adsorption of I- on Calcined Mg-Al Hydrotalcite

被引：0

作者：

Dong Y. ^{[1
]}

Liu J. ^{[1
]}

Li F.-Z. ^{[1
]}

Liu Z.-X. ^{[1
]}

Yang J.-J. ^{[1
]}

Liao J.-L. ^{[1
]}

Yang Y.-Y. ^{[1
]}

Liu N. ^{[1
]}

机构：

[1] Key Laboratory of Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu

来源：

Liao, Jia-Li (liaojiali@scu.edu.cn) | 1942年 / Atomic Energy Press卷 / 51期

关键词：

Adsorption; I[!sup]-[!/sup; Mg-Al hydrotalcite;

D O I：

10.7538/yzk.2017.youxian.0100

中图分类号：

学科分类号：

摘要：

The layered double hydroxides (LDH) containing Mg2+ and Al3+ in the brucite-like layers and interlayer carbonate ions were prepared by co-precipitation method and characterized by XRD, FT-IR and SEM. The adsorption behavior of I- on LDH was investigated as a function of calcination temperature, initial pH, contact time and initial I- concentration. The results show that the calcined LDH under 500℃ (CLDH-500) has the highest adsorption capacity for I-. The maximum adsorption capacity of 217. 22 mg/g is achieved at pH=6 with 8 h contact time when initial I- concentration is 500 mg/L. Pseudo-first-order and pseudo-second-order kinetic models and intraparticle diffusion model were used to describe the adsorption process, and the results indicate that the adsorption data correlate well with pseudo-first-order kinetic model and intraparticle diffusion model (R2>0.96). The fitting results of Langmuir isotherm model (R2>0.99) show that the adsorption of I- on CLDH-500 is monolayer. This method can provide technical and theoretical support for the removal of I- from radioactive waste water. © 2017, Editorial Board of Atomic Energy Science and Technology. All right reserved.

引用

页码：1942 / 1948

页数：6

共 13 条

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