Removal of Cd2+ from aqueous solution by adsorption using Fe-montmorillonite

Wu, Pingxiao; Wu, W.; Li, Shuzhen; Xing, Ning; Zhu, Nengwu; Li, Ping; Wu, Jinghua; Yang, Chen; Dang, Zhi

doi:10.1016/j.jhazmat.2009.04.022

Cited by 193 publications

(86 citation statements)

References 42 publications

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“…The increase in basal spacing was not directly related to the increase in surface area. 28,30,40 The surface area results corroborated the XRD, FTIR, and TGA data and attested to clay functionalization. Table 2 also shows the specific surface area measured by the N 2 adsorption and the methylene blue (MB) methods.…”

Section: Thermogravimetric Curvessupporting

confidence: 58%

“…The surface area obtained in this work agrees with surface area values reported in other papers. 28,30,35,39 The surface area of BEN-APTS, BEN-TMPT, and BEN-TMPO decreased as compared with the surface area of BEN. This happened probably because the organic compounds occupied active bentonite sites, which reduced the number of active sites available for gas adsorption.…”

Section: Thermogravimetric Curvesmentioning

confidence: 98%

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Hybrid Materials Based on Bentonite Functionalized with Amine Groups via the Hydrolytic Sol-Gel Method

Gilberto¹,

Marçal²,

Silva³

et al. 2015

Journal of the Brazilian Chemical Society

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Bentonite is a natural clay that presents characteristics such as good capacity to exchange cations, large specific surface area, large porosity, and possibility to undergo intercalation and/or functionalization. This work reports on bentonite functionalization with organomodified alkoxides. Functionalization afforded hybrid materials displaying desirable properties for adsorption of chromium trivalent ions. Infrared absorption spectroscopy, X-ray powder diffraction, thermal analysis, specific surface area analysis, and adsorption experiments with methylene blue helped to characterize the materials and evaluate their cationic exchange capability. These techniques evidenced functionalization of the Brazilian bentonite. Kinetic and equilibrium experiments on the adsorption of chromium trivalent ions aided determination of the equilibrium time of kinetic adsorption isotherms and revealed whether the functionalized matrices adsorbed chromium trivalent ions. Chromium displayed S1 type adsorption isotherms, which confirmed that adsorption capacity originated from cooperative forces between the adsorbate and the hybrid adsorbents.

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Section: Thermogravimetric Curvessupporting

confidence: 58%

Section: Thermogravimetric Curvesmentioning

confidence: 98%

Hybrid Materials Based on Bentonite Functionalized with Amine Groups via the Hydrolytic Sol-Gel Method

Gilberto¹,

Marçal²,

Silva³

et al. 2015

Journal of the Brazilian Chemical Society

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“…Hydroxyl-metal pillared montmorillonites, on the other hand, exhibits a strong affinity for heavy metals and phosphate [11][12][13][14][15][16]. Inorganic-organic montmorillonite (IOMts), intercalated by both surfactant and hydroxyl-metal, have been developed to remove both organic and inorganic contaminants [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, in this study, IOMts were obtained by modifying Al 13 pillared montmorillonite (AlPMt) with a cationic surfactant (C16) and a zwitterionic surfactant (Z16), denoted as C-AlPMts and Z-AlPMts, respectively (Fig. 1) 12 ] 7+ ). The structures and adsorption properties of the resulting IOMts were investigated.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of phenol, phosphate and Cd(II) by inorganic–organic montmorillonites: A comparative study of single and multiple solute

Zhu

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…2,3 Unlike organic toxicants, heavy metals are not appropriate to biological degradation. 4 Cadmium, which is highly toxic to human, plants and animals even at low concentrations, has been classified by US Environmental Protection Agency as a probable human carcinogen. 2 It has an extremely long biological half-life and causes kidney damage, altered renal tubular function, impaired regulation of calcium and phosphorus, bone demineralization, osteomalacia, and pathological fractures.…”

Section: Introductionmentioning

confidence: 99%

Cadmium Removal Performances of Different Dye Ligands Attached Cryogel Disks

Keleş¹,

Inanan²,

Tüzmen³

et al. 2015

Croat. Chem. Acta

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Abstract. Poly(HEMA) cryogel disks were synthesized by free radical polymerization of 2-hydroxyethylmethacrylate (HEMA), and then Cibacron Blue F3GA (CB), Reactive Green 19 (RG) and Congo Red (CR) were immobilized as dye ligands. Disks were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and swelling degree, porosity calculations. Cd 2+ adsorption experiments were performed for 60 min. Maximum adsorption capacities were determined as 25.5 mg/g; 48.0 mg/g and 28.5 mg/g at pH = 7.0 for poly(HEMA)-CB; poly(HEMA)-RG and poly-(HEMA)-CR, respectively. Langmuir isotherm fitted best with the adsorption data and adsorption thermodynamics showed that Cd 2+ adsorption is thermodynamically favorable and a physisorption process. A great majority of adsorbed Cd 2+ desorbed with 1 M NaCl and cryogel disks can be re-used in adsorption experiments. Cd 2+ removal efficiencies of disks from human plasma are approximately 45 %. Dyeattached cryogel disks synthesized in this study have potential in use for environmental and therapeutic applications.

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Removal of Cd2+ from aqueous solution by adsorption using Fe-montmorillonite

Cited by 193 publications

References 42 publications

Hybrid Materials Based on Bentonite Functionalized with Amine Groups via the Hydrolytic Sol-Gel Method

Hybrid Materials Based on Bentonite Functionalized with Amine Groups via the Hydrolytic Sol-Gel Method

Adsorption of phenol, phosphate and Cd(II) by inorganic–organic montmorillonites: A comparative study of single and multiple solute

Cadmium Removal Performances of Different Dye Ligands Attached Cryogel Disks

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