Kinetics of the adsorption of scandium and cerium ions in sulfuric acid solutions on a nanomodified activated carbon

被引：55
作者：
Burakova, I. V. [1 ]
Burakov, A. B. [1 ]
Tkachev, A. G. [1 ]
Troshkina, I. D. [2 ]
Veselova, O. A. [2 ]
Babkin, A. V. [1 ]
Aung, Wei Moe [2 ]
Ali, Imran [3 ,4 ]
机构：
[1] Tambov State Tech Univ, 106 Sovetskaya St, Tambov 392000, Russia
[2] Dmitry Mendeleev Univ Chem Technol Russia, Miusskaya Sq 9, Moscow 125047, Russia
[3] Taibah Univ, Coll Sci, Dept Chem, Al Madinah Al Munawarah 41477, Saudi Arabia
[4] Jamia MilliaIslamia Cent Univ, Dept Chem, New Delhi 110025, India
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2018年 / 253卷
关键词：
Rare-earth elements; Adsorption; Hybrid materials; Activated carbon; Carbon nanotubes; GREEN SYNTHESIS; DRUG RESIDUE; REMOVAL; WATER; ADSORBENT; LIQUID; THERMODYNAMICS; BIOSORPTION; POLLUTANT; HERBICIDE;
D O I：
10.1016/j.molliq.2018.01.063
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The adsorption of rare-earth elements (cerium and scandium) on pristine and nanomodified activated carbons in sulfuric acid solutions simulating the composition of multi-metallic ore leaching solutions was studied. New applications of scandium and cerium in industry, which constitute the main segment of wastewater pollution, were described. Various materials used to extract target metals were considered. A hybrid material based on carbon nanotubes-modified coconut shell activated carbon was proposed, and its structural and physico-chemical characteristics were described. The kinetic parameters of the adsorption of the rare earth elements studied, as well as adsorption rate constants, were determined. The optimum adsorption time was found to be 60 min. It was established that the process of adsorbing the cerium and scandium ions is driven by mixed diffusion, and the adsorption kinetics can also be satisfactorily described using the pseudo-first order model for all the ions. Thus, both physical adsorption and chemical interactions among the metal ions and the adsorbent functional groups can be assumed to take place during the extraction of the cesium and scandium ions. (C) 2018 Elsevier B.V. All rights reserved.
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收藏
页码：277 / 283
页数：7
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