Wetting stability of Si-MCM-41 mesoporous material in neutral, acidic and basic aqueous solutions

Landau, Miron V.; Varkey, Saji P.; Herskowitz, M.; Regev, Oren; Pevzner, Svetlana; Sen, Tapas; Luz, Z.

doi:10.1016/s1387-1811(99)00133-x

Cited by 174 publications

(116 citation statements)

References 14 publications

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“…It must also be noted that the pH of the boiling solution was 11 during N-methylglucamine functionalization. It is well documented that the crystalline structure of MCM-41 collapses during treatment in basic aqueous solutions [44]. Yet, the glucamine functionalized MCM-41 sample possessed organized pore structure, though with the reduced quality.…”

Section: Characterization Of the Synthesized Sorbentmentioning

confidence: 97%

Synthesis, characterization and application of a novel sorbent, glucamine-modified MCM-41, for the removal/preconcentration of boron from waters

Kaftan

Açıkel

Eroğlu

et al. 2005

Analytica Chimica Acta

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A novel sorbent was prepared by the functionalization of an inorganic support material, MCM-41, with N-methylglucamine for the uptake of boron from aqueous solutions prior to its determination by inductively coupled plasma optical emission spectrometry (ICP-OES). Characterization of the newly synthesized material was performed using BET, XRD, TEM, SEM and DRIFTS techniques, in addition to its C and N elemental content. Sorption behavior of the novel sorbent for boron was also investigated and found to obey Freundlich and Dubinin-Radushkevich (D-R) isotherm models. The maximum amount of B (as H 3 BO 3 ) that can be sorbed by the sorbent was calculated from the D-R isotherm and was found to be 0.8 mmol B g −1 of sorbent. The applicability of the new sorbent for the removal/preconcentration of boron from aqueous samples was examined by batch method. It was found that the sorbent can take up 85% of boron in 5 min whereas quantitative sorption is obtained in 30 min. Any pH greater than 6 can be used for sorption. Desorption from the sorbent was carried out using 1.0 M HNO 3 . The sorption efficiency of the new sorbent was also compared to that of Amberlite IRA 743, a commercial resin with N-methylglucamine functional groups. Within the experimental conditions employed, the new sorbent was found to have higher sorption efficiency than the commercial resin. For method validation, spike recovery tests were performed at various concentration levels in different water types and were found to be between 83-95 and 75-92% for ultra pure water and geothermal water, respectively.

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Section: Characterization Of the Synthesized Sorbentmentioning

confidence: 97%

Synthesis, characterization and application of a novel sorbent, glucamine-modified MCM-41, for the removal/preconcentration of boron from waters

Kaftan

Açıkel

Eroğlu

et al. 2005

Analytica Chimica Acta

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“…19 To avoid structural degradation the pH of the exchange solutions should not be higher than 10, and exchange times should be kept on the order of minutes. Fortunately, we found that the maximum loading at a given pH is achieved after just a few minutes, making longer exposure times unnecessary.…”

Section: Xrd Characterization Of Grafted Materialsmentioning

confidence: 99%

Structure of Ni(II) and Ru(III) Ammine Complexes Grafted onto Mesoporous Silicate Sieve

Brühwiler

Frei

2003

J. Phys. Chem. B

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“…As MCM-41 exhibits low hydrothermal stability (4 -16), many workers have studied the improvement of stability by modification of the synthesis conditions. Some examples include choice of siliceous source (6), change of pH (7), reaction time (3), temperature (3), and effect of salt addition (8). Previous studies have examined the use of mesoporous silicates for immobilization of globular enzymes (17) and for the adsorption of proteins and vitamins (18).…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Cadmium(II) and Lead(II) on Mesoporous Silicate MCM‐41

Oshima

Perera

Northcott

et al. 2006

Separation Science and Technology

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This investigation examines metal ion adsorption on mesoporous silicate, MCM-41, synthesized from sodium silicate solution and cethyltrimethylammonium bromide (CTAB). MCM-41 has potential as an adsorbent material, with a regular hexagonal pore structure, large specific surface area, and large pore volume. The MCM-41 synthesized for this investigation is characterized using powder X-ray 1635 diffraction and nitrogen adsorption and desorption isotherms data. The adsorption behavior for cadmium(II) and lead(II) onto MCM-41 was studied by contacting the mesoporous silicate with an aqueous solution of metal salts and acetylacetone. Both Cd 2þ and Pb 2þ were found to quantitatively adsorb onto MCM-41. The results of this study suggest that MCM-41 may have applications in the recovery of toxic metals from waste waters.

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Wetting stability of Si-MCM-41 mesoporous material in neutral, acidic and basic aqueous solutions

Cited by 174 publications

References 14 publications

Synthesis, characterization and application of a novel sorbent, glucamine-modified MCM-41, for the removal/preconcentration of boron from waters

Synthesis, characterization and application of a novel sorbent, glucamine-modified MCM-41, for the removal/preconcentration of boron from waters

Structure of Ni(II) and Ru(III) Ammine Complexes Grafted onto Mesoporous Silicate Sieve

Adsorption Behavior of Cadmium(II) and Lead(II) on Mesoporous Silicate MCM‐41

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