Adsorption of copper on amine-functionalized SBA-15 prepared by co-condensation: Kinetics properties

Da’na, Enshirah; Silva, Nimal De; Sayari, Abdelhamid

doi:10.1016/j.cej.2010.11.017

Cited by 69 publications

(30 citation statements)

References 18 publications

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“…The pseudo-first-order kinetic model (Lagergren equation) assumes that the adsorption rate is proportional to the number of unoccupied sites. 20,21 The pseudo-second-order kinetic model considers that the adsorption rate is related to the square of the number of free sites. 22 According to pseudo-first-order and pseudo-second-order kinetic model, chemical reaction may be considered as the rate-limiting step.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Adsorptive behavior of Ni (II) on phosphoethanolamine functionalized titanium dioxid

Iravan¹

2018

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Titanium dioxide nano powder (21 nm average particle size, 99.5%) and phosphoethanolamine (98%) were purchased from Degussa and Merck (Germany), respectively. Appropriate amounts of nickel nitrate (Ni (NO 3) 2 • 6 H 2 O, 99%) purchased from Merck were used to prepare Ni (II) solutions with needed concentrations in distilled water. The other chemicals such as calcium nitrate (Ca (NO 3) 2 • 4 H 2 O, 99%), magnesium nitrate (Mg (NO 3) 2 • 6 H 2 O, 98.5%), nitric acid (69%), and sodium hydroxide (≥99%) were obtained from Merck. Distilled water was used for the reaction and washing process. Methods The metal ion concentrations were determined by an inductive coupled plasma atomic emission spectrophotometer (ICP-AES, Optima, Model 7300DV American). The pH values of the aqueous solutions were adjusted in the range of 2−6 using appropriate amount

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Section: Adsorption Kineticsmentioning

confidence: 99%

Adsorptive behavior of Ni (II) on phosphoethanolamine functionalized titanium dioxid

Iravan¹

2018

OAJS

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“…In addition to their use in catalytic processes, functionalized SBA-15 materials have been increasingly used as adsorbents [3][4][5][6][7][8], sensors [9][10][11], and carrier materials in drug delivery [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Sulfonic acid-functionalized mesoporous silica (SBA-Pr-SO3H) as solid acid catalyst in organic reactions

Ziarani

Lashgari

Badiei

2015

Journal of Molecular Catalysis A: Chemical

143

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“…The develop of mesoporous silica, which provides uniform mesopores (> 2 nm) and high surface area, has widen the variation of substrates for the adsorbents of toxic substances. [40][41][42][43][44][45][46][47][48][49] For more finely prepared solids, N -(2-aminoethyl)aminopropyltriethoxysilane (AEAPTES) grafted on MCM-41 with Fe 3+ additive adsorbs 117 mg of SeO 2− 4 per g (i.e., 64.6 mg-Se/g). 50 In addition, the adsorbent shows a good selectivity from sulfate solution.…”

Section: Introductionmentioning

confidence: 99%

Selenate Adsorption on Pre-Coordinated Fe3+-Silane Complexes Grafted on Mesoporous Silicas

Otsuka¹,

Yoshitake²

2014

j nanosci nanotechnol

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Fe3+ was coordinated N-[2-(aminoethyl)-3-aminopropyltriethoxysilane], AEAPTES, followed by being grafted on MCM-41, SBA-15 and Cab-O-sil M7D. The mixing ratio, n = [AEAPTES]/[Fe], in the above coordination reaction was varied from 1 to 3. These nine functionalized silicas, denoted as Fe(en)n-silica (n = 1, 2, 3 and silica = MCM-41, SBA-15 and M7D), were used for the adsorption of aqueous selenate. The saturation of adsorption isotherm occurred at Se/Fe = 2 on Fe(en)2- MCM-41 and Fe(en)2-SBA-15, while Fe(en)- and Fe(en)3-MCM-41 and Fe(en)- and Fe(en)3-SBA-15 adsorbed selenate until Se/Fe = 1. The saturation at Se/Fe = 1 was obtained for all absorbents prepared with M7D substrate, suggesting a transformation of the adsorption sites realized on Fe(en)2-MCM-41 and Fe(en)2-SBA-15. The concave curvature of the surface of mesoporous silicas is possibly critical to retain the coordination structure of adsorption sites. The largest capacity obtained among these adsorbents was 1.1 mmol/g, found on Fe(en)2-SBA-15. The structure of adsorption sites was analysed by X-ray absorption spectroscopies in order to obtain the evidences for the distortion of coordination structure induced by grafting and the bond formation between Se and Fe after adsorption.

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Adsorption of copper on amine-functionalized SBA-15 prepared by co-condensation: Kinetics properties

Cited by 69 publications

References 18 publications

Adsorptive behavior of Ni (II) on phosphoethanolamine functionalized titanium dioxid

Adsorptive behavior of Ni (II) on phosphoethanolamine functionalized titanium dioxid

Sulfonic acid-functionalized mesoporous silica (SBA-Pr-SO3H) as solid acid catalyst in organic reactions

Selenate Adsorption on Pre-Coordinated Fe3+-Silane Complexes Grafted on Mesoporous Silicas

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