Manganese dioxide-loaded mesoporous SBA-15 silica composites for effective removal of strontium from aqueous solution

被引:23
作者
Dan, Hui [1 ]
Ding, Yi [1 ]
Wang, Enchao [1 ]
Yang, Wenping [1 ]
He, Xinmiao [1 ]
Chen, Li [1 ]
Xian, Qiang [1 ]
Yi, Facheng [1 ]
Zhu, Wenkun [1 ]
机构
[1] Southwest Univ Sci & Technol, Key Subject Lab Natl Def Radioact Waste & Environ, Mianyang 621010, Sichuan, Peoples R China
关键词
Strontium; MnO2/SBA-15; Adsorption behavior; Adsorption isotherm; Kinetic and thermodynamic; ENVIRONMENTAL-CONDITIONS; ADSORPTION BEHAVIOR; HEAVY-METALS; SORPTION; CADMIUM; BATCH; IONS; ACID; HYDROXYAPATITE; COPPER(II);
D O I
10.1016/j.envres.2020.110040
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Manganese dioxide-loaded mesoporous SBA-15 silica (MnO2/SBA-15) composites with short pore length were aprepared for the first time by simply immersing SBA-15 into a KMnO4 and MnCl2 mixed solution. Adsorption of Sr2+ from aqueous solution by using the MnO2/SBA-15 was investigated by varying the pH, contact time, initial Sr2+ concentration, MnO2 content and temperature. The adsorption process was rapid during the first 40 min and reached equilibrium in 120 min. The Sr2+ adsorption capacity increased with increasing pH, MnO2 content and temperature, and the adsorption capacity of SBA-15 was significantly improved by the loading of MnO2. Moreover, the experimental adsorption data were analyzed using different equilibrium isotherm, kinetic and thermodynamic models. The results showed that the isotherm data were well-described by the Langmuir model. The maximum Sr2+ adsorption capacity was determined to be 75.1 mg g(-1) at 283 K based on the Langmuir model. The analyzed kinetic data indicated that the Sr2+ adsorption process was well fitted by the pseudo-second order model. Furthermore, the thermodynamic parameters of adsorption were also determined from the equilibrium constant values obtained at different temperatures. The results suggested that the adsorption process was spontaneous and endothermic, and the overall mechanism of Sr2+ adsorption was a combination of physical and chemical processes.
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页数:10
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共 64 条
[1]   The effect of some operating variables on the adsorption of lead and cadmium ions on kaolinite clay [J].
Adebowale, Kayode O. ;
Unuabonah, Iyayi E. ;
Olu-Owolabi, Bamidele I. .
JOURNAL OF HAZARDOUS MATERIALS, 2006, 134 (1-3) :130-139
[2]   Immobilization of Tin (IV) molybdophosphate onto mesoporous silica SBA-15 and its application on strontium removal from aqueous solution [J].
Aghayan, H. ;
Mahjoub, A. R. ;
Khanchi, A. R. .
APPLIED SURFACE SCIENCE, 2012, 261 :14-20
[3]   Aqueous heavy metals removal by adsorption on amine-functionalized mesoporous silica [J].
Aguado, Jose ;
Arsuaga, Jesus M. ;
Arencibia, Amaya ;
Lindo, Montana ;
Gascon, Victoria .
JOURNAL OF HAZARDOUS MATERIALS, 2009, 163 (01) :213-221
[4]   Adsorption of strontium ions from aqueous solution using hydrous, amorphous MnO2-ZrO2 composite: a new inorganic ion exchanger [J].
Ahmadi, S. J. ;
Akbari, N. ;
Shiri-Yekta, Z. ;
Mashhadizadeh, M. H. ;
Pourmatin, A. .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2014, 299 (03) :1701-1707
[5]   Batch adsorption of 4-nitrophenol by acid activated jute stick char: Equilibrium, kinetic and thermodynamic studies [J].
Ahmaruzzaman, M. ;
Gayatri, S. Laxmi .
CHEMICAL ENGINEERING JOURNAL, 2010, 158 (02) :173-180
[6]   Kinetic and thermodynamics of chromium ions adsorption onto low-cost dolomite adsorbent [J].
Albadarin, Ahmad B. ;
Mangwandi, Chirangano ;
Al-Muhtaseb, Ala'a H. ;
Walker, Gavin M. ;
Allen, Stephen J. ;
Ahmad, Mohammad N. M. .
CHEMICAL ENGINEERING JOURNAL, 2012, 179 :193-202
[7]  
[Anonymous], 1989, HANDLINGAR
[8]   Hexavalent chromium removal from aqueous solution by adsorption on treated sawdust [J].
Baral, Saroj S. ;
Das, Surendra N. ;
Rath, Pradip .
BIOCHEMICAL ENGINEERING JOURNAL, 2006, 31 (03) :216-222
[9]   Sorption of trace elements on mineral surfaces: Modern perspectives from spectroscopic studies, and comments on sorption in the marine environment [J].
Brown, GE ;
Parks, GA .
INTERNATIONAL GEOLOGY REVIEW, 2001, 43 (11) :963-1073
[10]   Removal of strontium from aqueous solutions by adsorption onto activated carbon: kinetic and thermodynamic studies [J].
Chegrouche, S. ;
Mellah, A. ;
Barkat, A. .
DESALINATION, 2009, 235 (1-3) :306-318