Adsorption of heavy metals on amine-functionalized SBA-15 prepared by co-condensation: Applications to real water samples

Da’na, Enshirah; Sayari, Abdelhamid

doi:10.1016/j.desal.2011.09.034

Cited by 134 publications

(53 citation statements)

References 18 publications

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“…The material was collected by filtration, dried in air, and extracted with ethanol. Excessive Pluronic was washed with ethanol to remove template, filtered, and dried under vacuum at 100˚C for 3 h [50].…”

Section: Synthesis Of Functionalized Silica Hybridsmentioning

confidence: 99%

Functionalized mesoporous silica: absorbents for water purification

Nasreen

Urooj

Rafique

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThe release of heavy metals into the environment is a potential threat to water and soil quality as well as to plants, animals, and human health. In the current research work, organically functionalized mesoporous silicates (MSU-H) were prepared by the cocondensation between sodium silicate and organoalkoxysilanes in the presence of the nonionic surfactant triblock copolymer P104. The surfactant was used as a template for improving the porosity of hybrid gels. Synthesized materials were characterized. The surface morphology and textural properties of such materials varied with various kinds of groups in the channels. In this study, removal of some heavy metal ions from aqueous solution by adsorption process was investigated. Batch adsorption studies show that the adsorption capacity of metal ions on the functionalized silicates is more than that on pure MSU-H. Data show adsorption on synthesized materials is a time-efficient process, suggesting adsorption on external surface as well as the mesoporous process. Adsorption models of Langmuir, Freundlich, and Temkin depicted equal goodness for all adsorbents, whereas pseudo-second-order kinetics is in best agreement with experimental data.

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Section: Synthesis Of Functionalized Silica Hybridsmentioning

confidence: 99%

Functionalized mesoporous silica: absorbents for water purification

Nasreen

Urooj

Rafique

et al. 2016

Desalination and Water Treatment

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“…The maximum adsorption capacity had an order of Cu(II) > Zn(II) > Ni (II) on mass basis. Dana et al studied SBA-15 functionalized with 3-aminopropyltrimethoxy-silane as potential adsorbent for Cd(II), Co(II), Cu(II), Zn(II), Pb(II), Ni(II), Al(III) and Cr(III) ions and adsorption capacity and selectivity were analyzed in single and multi-metal solutions (12). The results showed an affinity on molar basis for metal ions in single metal solutions following the order of; Cd(II) > Co(II) > Cu(II) > Cr(II) > Pb(II) > Ni(II) > Al (III) > Zn(II) and for mixed metals, the order was Al(III) > Ni(II) > Cr(II) > Pb(II) >Zn(II) > Cd(II) > Co(II) > Cu(II).…”

Section: Introductionmentioning

confidence: 99%

Poly-L-Histidine Attached Poly(glycidyl methacrylate) Cryogels for Heavy Metal Removal

Çimen

Türkmen

Deni̇zli̇

2015

Journal of Macromolecular Science, Part A

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Poly-L-histidine immobilized poly(glycidyl methacrylate) (PGMA) cryogel discs were used for the removal of heavy metal ions [Pb (II), Cd(II), Zn(II) and Cu(II)] from aqueous solutions. In the first step, PGMA cryogel discs were synthesized using glycidyl methacrylate (GMA) as a basic monomer and methylene bisacrylamide (MBAAm) as a cross linker in order to introduce active epoxy groups through the polymeric backbone. Then, the metal chelating groups are incorporated to cryogel discs by immobilizing poly-L-histidine (mol wt 5000) having poly-imidazole ring. The swelling test, fourier transform infrared spectroscopy and scanning electron microscopy were performed to characterize both the PGMA and poly-L-histidine immobilized PGMA [PHis@PGMA] cryogel discs. The effects of the metal ion concentration and pH on the adsorption capacity were studied. These parameters were varied between 3.0-6.0 and 10-800 mg/L for pH and metal ion concentration, respectively. The maximum adsorption capacity of heavy metal ions of P-His@PGMA cryogel discs were 6.9 mg/g for Pb(II), 6.4 mg/g for Cd(II), 5.6 mg/g for Cu(II) and 4.3 mg/g for > Zn(II). Desorption of heavy metal ions was studied with 0.1 M HNO 3 solution. It was observed that cryogel discs could be recurrently used without important loss in the adsorption amount after five repetitive adsorption/desorption processes. Adsorption isotherms were fitted to Langmuir model and adsorption kinetics were suited to pseudo-second order model. Thermodynamic parameters (i.e. DH DS , DG ) were also calculated at different temperatures.

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“…[19][20][21] The typical synthesis methods for imprinting mesoporous silica are post-grafting [16,20,22] and co-condensation. [19,23,24] Post-synthesis grafting has some major drawbacks which include poor control over the final location and geometry of the metal complex and partial blocking of the porosity. [11] However, for the co-condensation method, the organic functionality can be introduced into the silica framework in a single step and make it better to control the loading and spatial distribution of the organic groups by choosing a desired silica/organosilane ratio.…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of Ion Imprinted Mesoporous Silica Adsorbents by a Co-Condensation Pathway and Application in a Fixed-Bed Column Study for Lead Removal

Gao

Liu

et al. 2015

Aust. J. Chem.

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Highly selective lead ion imprinted mesoporous silica adsorbents (Pb II -IMS) were prepared through a co-condensation pathway with 3-(g-aminoethylamino)propyltrimethoxysilane (AAPTS) (Pb II -IMS-NN) and 3-aminepropyltriethoxysilyl (APTES) (Pb II -IMS-N) as monomers. The prepared adsorbents were characterised by FT-IR spectroscopy, X-ray photoelectron spectroscopy, power X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, and nitrogen adsorption-desorption techniques. The results showed that the synthesised adsorbents presented a highly ordered mesoporous structure. In comparison with Pb II -IMS-N, Pb II -IMS-NN demonstrated a higher adsorption capacity in a series of static and dynamic adsorption experiments, and was further applied to a continuous fixed-bed column study under different conditions. It was found that the breakthrough time of the fixed-bed increased with an increase in bed depth, but decreased with increased flow rate and initial Pb II concentration, and the dynamic adsorption data was more consistent with the Thomas model than the Adams-Bohart model. Furthermore, the Pb II -IMS-NN showed a greater recognition and binding affinity towards the target lead ions than Pb II -IMS-N.

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Adsorption of heavy metals on amine-functionalized SBA-15 prepared by co-condensation: Applications to real water samples

Cited by 134 publications

References 18 publications

Functionalized mesoporous silica: absorbents for water purification

Functionalized mesoporous silica: absorbents for water purification

Poly-L-Histidine Attached Poly(glycidyl methacrylate) Cryogels for Heavy Metal Removal

A Facile Synthesis of Ion Imprinted Mesoporous Silica Adsorbents by a Co-Condensation Pathway and Application in a Fixed-Bed Column Study for Lead Removal

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