Sorption studies of radionuclides on a modified mesoporous cerium(IV) silicate

Sepehrian, Hamid; Ghannadi‐Maragheh, Mohammad; Waqif-Husain, Syed; Yavari, R.; Khanchi, Ali Reza

doi:10.1007/s10967-007-6979-4

Cited by 19 publications

(21 citation statements)

References 39 publications

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“…[14][15][16] To immobilize the metal adsorptive functional group containing silane on the mesopore wall, MCM-41 was silanized with MPTS and APTES using a previously reported grafting method. 17 In the specific synthesis, 1.0 g of MCM-41 was refluxed for 24 h with 100 mL of dry toluene, 2 mL of MPTS and APTES.…”

Section: Preparation Of Modified Mcm-41mentioning

confidence: 99%

Modified Mesoporous Silicate MCM‐41 for Zinc Ion Adsorption: Synthesis, Characterization and Its Adsorption Behavior

Sepehrian¹,

Waqif-Husain

Rakhshanderu

et al. 2009

Chin. J. Chem.

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Modified MCM-41 has been prepared by bi-functionalization of thiol and amino functional groups onto mesoporous silicate MCM-41. Elemental analysis (EA), thermogravimetry analysis (TGA) and FTIR techniques were used to quantify the attachment of the thiol and amino functional groups to the mesoporous silicate pore wall. Powder X-ray diffraction (PXRD) and nitrogen adsorption techniques were used to establish the pore diameter, packing of the pores and specific surface area of the modified mesoporous silicate MCM-41. Adsorption behavior for 18 metal ions on this sorbent has been studied and discussed. This sorbent has high affinity for zinc ions against amino-or thiol-functionalized MCM-41 sorbents.

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Section: Preparation Of Modified Mcm-41mentioning

confidence: 99%

Modified Mesoporous Silicate MCM‐41 for Zinc Ion Adsorption: Synthesis, Characterization and Its Adsorption Behavior

Sepehrian¹,

Waqif-Husain

Rakhshanderu

et al. 2009

Chin. J. Chem.

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“…The TGA curve of the uncalcined MCM-41 shows five steps of weight loss. 12 The thermogram of the amino-functionalized MCM-41 shows a gradual weight loss up to 900 ℃. The TGA curve of the NH 2 -MCM-41 shows three steps of weight loss (35-130, 250-350, and ＞600 ℃).…”

Section: Resultsmentioning

confidence: 99%

“…12 To immobilize the metal adsorptive functional group containing silane on the mesopore wall, MCM-41 was silanized with APTES using a previously reported grafting method. 17 In the specific synthesis, 1.0 g of MCM-41 was refluxed for 24 h with 100 mL of dry toluene and 4 mL of silane containing an amino functional group at 60 ℃.…”

Section: Preparation Of Amino-functionalized Mcm-41mentioning

confidence: 99%

“…11 Mesoporous silica for use in the removal of toxic heavy metals has been the subject of extensive research recently, while our knowledge of the adsorption of noble metal ions using mesoporous silica is, comparatively, incomplete. Following our work on synthesis of new modified mesoporous sorbents [12][13][14] in this paper, we report the synthesis of amino-functionalized mesoporous silica MCM-41, its properties and sorption behavior for 18 metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Amino‐functionalized Meso‐ porous Silicate MCM‐41 for Removal of Toxic Metal Ions

2009

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Amino-functionalized MCM-41 has been prepared by grafting amino containing functional groups onto mesoporous silicate MCM-41 and characterized by powder X-ray diffraction, N 2 adsorption/desorption measurement, SEM, FT-IR, thermogravimetry and elemental analysis to confirm the ordered mesoporous structure and the functionalization of the amino groups. Sorption behavior for 18 metal ions on this sorbent has been studied and discussed.

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“…In our previous work, we incorporated elements such as Zr, Ce and Sn into the framework of mesoporous MCM-41 and their sorption behavior has been studied. [6][7][8][9][10] Amorphous lanthanum silicate as an ion-exchanger has been synthesized and their sorption behavior for radionuclides and inorganic metal ions has been studied. 11,12 Recently mesoporous lanthanum silicate has been employed as catalyst for oxidation of styrene 13 and as adsorbent for sorption of toxic metal ions.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Studies of Radionuclides and Toxic Metal Ions on a Modified Mesoporous Lanthanum(III) Silicate

et al. 2010

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A new adsorbent, modified mesoporous lanthanum(III) silicate, has been prepared with various molar ratios of Si/La (10,20, 40, 80) and cethyltrimethylammonium bromide (CTAB) as structure directing agent. XRD, nitrogen sorption, SEM, IR, thermogravimetry and sorption of radionuclides and toxic metal ions have been studied. The results show that adsorption amount of some element such as Pb(II) and Th(IV) has been increased significantly by incorporation of lanthanum ions in the framework of adsorbent. Separation of Co(II)-Th(IV), Co(II)-U(VI) and Mo(VI)-U(VI) has been developed on columns of this adsorbent.

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Sorption studies of radionuclides on a modified mesoporous cerium(IV) silicate

Cited by 19 publications

References 39 publications

Modified Mesoporous Silicate MCM‐41 for Zinc Ion Adsorption: Synthesis, Characterization and Its Adsorption Behavior

Modified Mesoporous Silicate MCM‐41 for Zinc Ion Adsorption: Synthesis, Characterization and Its Adsorption Behavior

Synthesis and Characterization of Amino‐functionalized Meso‐ porous Silicate MCM‐41 for Removal of Toxic Metal Ions

Adsorption Studies of Radionuclides and Toxic Metal Ions on a Modified Mesoporous Lanthanum(III) Silicate

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