Study of thallium(III) adsorption onto multiwall carbon nanotubes

被引：24
|
作者：
Rehman, Saeed Ur [1 ]
Ullah, Najeeb [1 ,2 ]
Kamali, Ali Reza [2 ]
Ali, Khurshid [1 ]
Yerlikaya, Cemile [2 ,3 ]
Rehman, Hanif Ur [1 ]
机构：
[1] Univ Peshawar, Inst Chem Sci, Peshawar, Pakistan
[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
[3] Istanbul Tech Univ, Chem & Met Fac, Dept Chem Engn, TR-34469 Istanbul, Turkey
来源：
NEW CARBON MATERIALS | 2012年 / 27卷 / 06期
关键词：
Thallium; Multiwalled carbon nanotubes; Adsorption; Oxidation; AQUEOUS-SOLUTION; OXIDATION; SORPTION; PB(II); IONS; FUNCTIONALIZATION; EQUILIBRIUM; EXTRACTION; OZONE;
D O I：
10.1016/S1872-5805(12)60024-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Multiwall carbon nanotubes (MWCNTs) oxidized by H2SO4, KMnO4, and HNO3 were used as sorbents and their sorption abilities for Tl(III) were compared with raw MWCNTs. The Langmuir model was used for the calculation of the amount of Tl(III) sorbed on the surface of MWCNTs. The acidic oxidation treatment of MWCNTs yielded a large number of functional groups, leading to a sharp increase in Tl(M) adsorption. Maximum adsorption of Tl( was recorded at a pH value of 7. The maximum amounts of Tl( HE) sorbed on raw MWCNTs, H2SO4-oxidized, KMnO4-oxidized and HNO3-oxidized MWCNTs calculated by the Langmuir model were 3.0, 11.7,, 21.6 and 31.5 mg/g, respectively. The MWCNTs oxidized by HNO3 showed the best sorption performance for Tl (III) ions.
引用
收藏
页码：409 / 415
页数：7
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