Synthesis of composite by application of mixed Fe, Mg (hydr)oxides coatings onto bentonite – A use for the removal of Pb(II) from water

Ranđelović, Marjan S.; Purenović, Milovan M.; Zarubica, Aleksandra; Purenović, Jelena; Matović, Branko; Momčilović, Miloš

doi:10.1016/j.jhazmat.2011.11.025

Cited by 57 publications

(33 citation statements)

References 35 publications

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“…The procedure for obtaining a bentonite based composite involves the application of mixed Fe and Mg hydroxides coatings onto bentonite particles (0.375 mmol Fe and 0.125 mmol Mg per gram of bentonite) in aqueous suspension and subsequent thermal treatment of the solid phase at 498 K [53]. Bearing in mind layered structure of montmorillonite, the quite limited extent of isomorphous substitution of Mg for Fe in iron (hidr)oxides and significant differences in acid-base surface properties between these two (hydr)oxides, formation of heterogeneous coatings onto bentonite and specific structure of obtained composite have been achieved [54].…”

Section: Bentonite Modified By Mixed Fe Mg (Hydr)oxides Coatings Formentioning

confidence: 99%

New Composite Materials in the Technology for Drinking Water Purification from Ionic and Colloidal Pollutants

Ranđelović¹,

Zarubica²,

Purenović³

2012

Composites and Their Applications

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Section: Bentonite Modified By Mixed Fe Mg (Hydr)oxides Coatings Formentioning

confidence: 99%

New Composite Materials in the Technology for Drinking Water Purification from Ionic and Colloidal Pollutants

Ranđelović¹,

Zarubica²,

Purenović³

2012

Composites and Their Applications

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“…composite materials, which could be also used for the environmental purposes as adsorbents of the organic and inorganic compounds and metal ions [22][23][24][25]. This paper deals with the structural and surface characterization of composite materials prepared by magnetic modification of the natural clay and their application as potential adsorbents of heavy metal cations.…”

Section: Introductionmentioning

confidence: 99%

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

Danková¹,

Fedorová²,

Bekényiová³

2017

AFST

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The natural clay bentonite (B) as adsorbent of lead cations was studied. To enhance its adsorption capacity, the coating by iron oxide particles, in two selected weight ratios: 2:1 (BM1) and 4:1(BM2), was used. The changes of the textural and surface parameters after the modification were studied by the low temperature nitrogen adsorption, XRD and SEM method, Mössbauer spectroscopy. The Pb(II) adsorption experiments were studied under the different conditions, such as pH of the model solutions, contact time and initial metal ion concentration. Higher adsorption rates of BM1 and BM2 samples were observed for lower initial metal ion concentrations.

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“…Traditional metal-removal techniques from water such as precipitation, oxidation, reduction, electrochemical treatment, reverse osmosis, solvent extraction, ion-exchange and evaporation are mostly expensive and difficult to apply (Ö zcan et al 2009;Kul and Koyuncu 2010;Gupta et al 2012, Gupta andRastogi 2009). Compared with the traditional methods, adsorption has received specific attention because it has significant advantages including high efficiency, easy handling, high selectivity and minimum production of chemical or biological sludge (Randelovic et al 2012;Gupta et al 2007aGupta et al , b, 2009.…”

Section: Introductionmentioning

confidence: 99%

“…Clay minerals, polymers and activated carbon have been used as adsorbents for removing metals from aqueous solutions (Randelovic et al 2012;Duranoglu et al 2012). Activated carbon is the most extensively used adsorbent in water purification processes.…”

Section: Introductionmentioning

confidence: 99%

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

2014

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We synthesized a novel poly acrylic acid-organobentonite (PAA-Bent) nanocomposite by successive intercalation of cetyltrimethylammonium (CTA) surfactant and polyacrylic acid (PAA) into the bentonite (Bent) interlayer spaces. The surfactant-modified clay (CTABent) and PAA-Bent nanocomposite were characterized by XRD and FT-IR techniques and used for removal of Pb(II) from aqueous solution. The XRD results confirmed the intercalation of CTA and PAA into the interlayer spaces of the bentonite increasing the d 001 spacing of the clay from 12.2 up to 38.9 Å . FT-IR analysis of the modified clay samples revealed the functional groups of CTA and PAA constituents alighted on the bentonite surfaces. Maximum Pb sorption capacity of the Bent and PAA-Bent predicted by Langmuir model were 52.3 and 93.0 mg g -1 , respectively, showing that the synthesized nanocomposite superiorly adsorbed Pb from the solution as compared to the Bent. The maximum Pb removal efficiency of 99.6 % was achieved by the nanocomposite at 25°C with \30 min contact time for a 7.5 g L -1 solid-to-liquid ratio and an initial metal concentration of 400 mg L -1 . The results indicated that PAA-Bent nanocomposite can be efficiently used as a superadsorbent for the removal of Pb(II) from aqueous solution.

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Synthesis of composite by application of mixed Fe, Mg (hydr)oxides coatings onto bentonite – A use for the removal of Pb(II) from water

Cited by 57 publications

References 35 publications

New Composite Materials in the Technology for Drinking Water Purification from Ionic and Colloidal Pollutants

New Composite Materials in the Technology for Drinking Water Purification from Ionic and Colloidal Pollutants

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

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