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

Sepehrian, Hamid; Waqif-Husain, Syed; Rakhshanderu, Farrokh; Kamel, L.

doi:10.1002/cjoc.200990363

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…Its unique pore morphology and large surface area offer great potential for its use in SPE. There have been many reports of employing functionalized silica for the separation and preconcentarion of metal ions from environmental samples . Chouyyok et.…”

Section: Introductionsupporting

confidence: 45%

Highly Selective Solid‐Phase Extraction of Pb(II) by Ion‐Imprinted Superparamagnetic Mesoporous Silica

et al. 2019

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Pb (II)-imprinted superparamagnetic mesoporous silica (SPMS) adsorbent has been synthesized and characterized. The thiol functionalized SPMS offered a fast adsorption kinetics for Pb(II) and equilibrium was achieved in just 20 min at pH 8.0. The adsorption isotherm data fits well with Langmuir model with a maximum adsorption capacity of 377.36 mg g À 1 . The selectivity co-efficients of imprinted adsorbent for Pb(II)/Cu(II) and Pb(II)/ Bi(III) were 3.36 and 3.05 times higher than that of nonimprinted adsorbent. The imprinted adsorbent was employed for the solid phase extraction of Pb(II) and its detection by graphite furnace atomic absorption spectrometry (GFAAS).The parameters affecting the determination of Pb(II) were also well investigated and optimized. A linear relationship between the Pb(II) concentration and the absorbance was found in the range of 0.8-500 ng mL À 1 with a detection limit of 0.25 ng mL À 1 . The imprinted adsorbent was applied to the determination of Pb(II) in two certified sediment samples with satisfactory results, which indicates that Pb(II)-imprinted superparamagnetic mesoporous silica adsorbent possess promising features of a viable adsorbent for the preconcentration of Pb(II) ions in complex matrices.[a] Dr.

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Section: Introductionsupporting

confidence: 45%

Highly Selective Solid‐Phase Extraction of Pb(II) by Ion‐Imprinted Superparamagnetic Mesoporous Silica

et al. 2019

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“…Also, other investigations was performed as, adsorption of Zn 2+ from aqueous solutions (Kwon et al, 2005), separation of Ag + and Cu 2+ from binary solution based on Hard-Soft Acid Base theory (HSAB) (Lam et al, 2005), selective removal of Cd 2+ and Zn 2+ from aqueous solutions by modified clinopetilolite (Hajialigol et al, 2006), removal of heavy metals from aqueous solutions by adsorption on brown alga (Freitas et al, 2008), removal of Zn 2+ by using hybrid precursor of silicon and carbon (Gupta et al, 2010), removal of Zn 2+ by using Moringa Oleifera Lam (Bhatti et al, 2007), adsorption of Zn 2+ by modified mesoporous silicate MCM-41 (Sepehrian et al, 2009), removal of Ni 2+ , Cd 2+ and Pb 2+ from ternary aqueous solution by amino functionalized mesoporous and nano mesoporous silica (Heidari et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of NH2-MCM-41 Nano Porous Adsorbent and Using it for Zn and Ag Metals Removal from Aqueous Solutions by Adsorption Method and Studying Effect of Some Physicochemical Parameters on it

Ghadikolaei¹,

Bahramifar²,

Ashrafi³

2013

RJASET

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In this study we have investigated removal of Zn and Ag Ions from aqueous solutions. Industrial pollutions by heavy metals ions as Ag and Zn is a universal environmental problem, because of their toxicity. Thus, we have studied removal of these ions by NH 2 -MCM-41 nano porous adsorbent at room temperature. This adsorbent has a high surface area, high adsorption ability, high factor of porosity and wide porous. In the batch experiment we have taken 150 cm -3 of considered metallic ion aqueous solution. After pH adjustment, nano porous absorbent was added and it was agitated by a rotary shaker. Then, pH, amount of adsorbent, initial concentration of metallic ion, time of contact and temperature parameters have determined. Thus, recovery of Ag and Zn metallic ions at pH = 7, adsorbent dose of 2 g/dm 3 and room temperature obtained 96.93 and 99.24%, respectively. Thermodynamic results indicate that adsorption process is endothermic and spontaneous. Obtained adsorption isotherm was fitted by Langmuir's adsorption isotherm which is single-layer adsorption. Moreover, this removal process has a second order kinetic. Synthesized adsorbent was characterized by FT-IR, SEM and XRD.

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

Cited by 3 publications

References 25 publications

Highly Selective Solid‐Phase Extraction of Pb(II) by Ion‐Imprinted Superparamagnetic Mesoporous Silica

Highly Selective Solid‐Phase Extraction of Pb(II) by Ion‐Imprinted Superparamagnetic Mesoporous Silica

Synthesis of NH2-MCM-41 Nano Porous Adsorbent and Using it for Zn and Ag Metals Removal from Aqueous Solutions by Adsorption Method and Studying Effect of Some Physicochemical Parameters on it

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

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