Application of novel Polypyrrole/thiol-functionalized zeolite Beta/MCM-41 type mesoporous silica nanocomposite for adsorption of Hg2+ from aqueous solution and industrial wastewater: Kinetic, isotherm and thermodynamic studies

2014 ◽  
Vol 289 ◽  
pp. 487-494 ◽  
Author(s):  
Hamedreza Javadian ◽  
Mehdi Taghavi
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
Industrial Wastewater ◽  
Zeolite Beta ◽  
Thermodynamic Studies ◽  
Silica Nanocomposite ◽  
Mcm 41

Removal of Pb(ii) from aqueous solution by mesoporous silica MCM-41 modified by ZnCl2: kinetics, thermodynamics, and isotherms

RSC Advances ◽  
2015 ◽  
Vol 5 (46) ◽  
pp. 37066-37077 ◽  
Author(s):  
Foad Raji ◽  
Alireza Saraeian ◽  
Majid Pakizeh ◽  
Faridreza Attarzadeh
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
High Performance ◽  
Mcm 41

ZnCl2-MCM-41 introduced itself as a high performance sorbent for Pb(ii) removal.

scholarly journals Preparation of spherical aminopropyl-functionalized MCM-41 and its application in removal of Pb(II) ion from aqueous solution

2019 ◽  
Vol 8 (1) ◽  
pp. 275-284 ◽  
Author(s):  
Yi Lin ◽  
Jinjia Xu ◽  
Bhosale Sanjana Sudhakar ◽  
Junjie Gu ◽  
Ruoyu Hong
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Synthesis Methods ◽  
Silica Microspheres ◽  
Mesoporous Silica Microspheres ◽  
Mcm 41

Abstract Mesoporous silica microspheres were prepared by the polymerization-induced colloid aggregation (PICA) and pseudomorphic synthesis methods. The prepared microspheres have high specific surface area and MCM-41 type structure. In the PICA process, acidic silica sol was utilized as silica source and the effect of molar ration (formaldehyde/urea) was investigated. Moreover, the influences of reaction time and temperature were also studied. The specific surface area of porous and mesoporous silica microspheres were 186.4 m2/g and 900.4 m2/g, respectively. The materials were characterized by SAXS, FTIR, SEM, TEM and nitrogen sorption measurements. The prepared silica microspheres were functionalized by (3-Aminopropyl)triethoxysilane and then used to remove the lead from aqueous solution. The result indicates that the grafted silica microspheres have rapid adsorption capacity and good reproducibility. The adsorption data was fitted well with the Langmuir isotherm model, and the maximum adsorption capacities for MCM-41 silica microspheres were 102.7 mg/g.

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