Removal of As (III) from Aqueous Solutions Using Montmorillonite

Anjum, Ansar; Lokeswari, Punnuswamy; Kaur, Manpreet; Datta, Monika

doi:10.4236/jasmi.2011.12004

Cited by 16 publications

(16 citation statements)

References 12 publications

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“…In addition to adsorption onto external surface, intercalation also takes place in phyllosilicates as evident from the XRD analysis. The d (001) spacing of MMT, CTAB-MMT and CPC-MMT was found to be 1.2, 1.76 and 1.95 nm respectively (an increase, with respect to MMT, of 0.56 nm and 0.75 nm for CTAB-MMT and CPC-MMT respectively), as already reported in our previous work [27].…”

Section: X-ray Diffraction Analysissupporting

confidence: 88%

Adsorptive Removal of Antimony (III) Using Modified Montmorillonite: A Study on Sorption Kinetics

Anjum¹,

Datta²

2012

JASMI

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The adsorptive removal of antimony (III) has been successfully obtained on montmorillonite (MMT) and modified MMT from synthetic solution. The adsorption behavior of the modified and unmodified MMT has been investigated as a function of initial concentration of metal ion in the solution, pH of the solution and contact time using a batch extraction process. The optimized process can be applied for the adsorption, detection and estimation of antimony from 0.006 µg/ml (6.0 ppb) to 100.00 µg/ml (100.0 ppm) in aqueous solution. It has been observed that almost 99% of antimony (III) can be successfully extracted from a solution containing 100 µg/ml of the metal ion at pH 6.0 at 25?C ± 2?C. The investigation of the kinetics of sorption of antimony (III) on MMT/modified MMTshows intraparticle diffusion to be the rate limiting step during the initial stages of adsorption followed by chemisorption

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Section: X-ray Diffraction Analysissupporting

confidence: 88%

Adsorptive Removal of Antimony (III) Using Modified Montmorillonite: A Study on Sorption Kinetics

Anjum¹,

Datta²

2012

JASMI

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“…According to the results of XRD (Fig. 1a), all the diffraction peaks are in good agreement with the face-centered-cubic (FCC) structured Fe 4 [Fe(CN) 6 ] 3 (PB) (JCPDS card no. 52-1907).…”

Section: Characterizations Of Feooh Microboxessupporting

confidence: 55%

“…Briefly, 3.8 g PVP was first dissolved into 50 mL 0.1 M HCl solution followed by the addition of 110 mg K 4 Fe(CN) 6 . After vigorous stirring for 40 min at room temperature, the mixture was transferred to an oven at 80 1C for 24 h. The obtained blue precipitate (K 4 [Fe(CN) 6 ] 3 , PB) was centrifuged and washed for several cycles with water and ethanol and finally dispersed into 10 mL absolute ethanol for further use. The FeOOH microboxes were obtained by the reaction between as-prepared PB and 0.1 M NaOH solution at room temperature.…”

Section: Synthesis Of Feooh Microboxesmentioning

confidence: 99%

Fabrication of FeOOH hollow microboxes for purification of heavy metal-contaminated water

Wang

Lan

Liu

et al. 2016

Phys. Chem. Chem. Phys.

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FeOOH, a frequently used adsorbent, has been widely applied in purifying aqueous heavy metals, and its performance can be greatly improved by enlarging the number of surface active sites. To this end, we fabricated FeOOH hollow microboxes constructed from numerous 2D nanosheets via a templateengaged reaction between Prussian blue (PB) and NaOH solution. With combined observations from X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), we confirmed that the hollow microboxes corroded from PB were composed of ample frizzy FeOOH nanosheets, which ensured extensive exposure of the surface active sites. Moreover, the FeOOH microboxes were utilized as an adsorbent in the removal of heavy metals (As(III), As(V) and Se(IV)) from water and the maximum adsorption capacities were reached up to 192.19 mg g À1 , 250.0 mg g À1 and 169.9 mg g À1 at pH = 7.0, 4.0 and 5.0, respectively. The superior adsorptive performance of the FeOOH microboxes was derived from their large content of reactive exposed hydroxyl groups, which was unambiguously confirmed by X-ray adsorption fine structure spectroscopy (XAFS), as well as by surface site density analysis.

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“…After given period of time the sample centrifuged at 3000 rpm for 15 min. Then the solution filtered through 0.45 μm membrane filter and analyzed for arsenic by Silver Diethyl dithiocarbamate method (SDDC) [21]. The effect of various parameters such as contact time (2, 5, 10, 15 and 30 min), pH (2,5,9 and 11) and ZrO 2 nanoparticles mass (0.1, 0.25, 0.5 and 1 g/L) were studied in term of their effect on reaction process.…”

Section: Removal Studiesmentioning

confidence: 99%

Characterization of ZrO2 Nano Particles Prepared by Glycothermal Method and their Efficiency as Adsorbent of As(III) and As(V) from Waste Water

Al–Farhan¹

2017

J Environ Anal Toxicol

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Removal of As (III) from Aqueous Solutions Using Montmorillonite

Abstract: ABSTRACT

Cited by 16 publications

References 12 publications

Adsorptive Removal of Antimony (III) Using Modified Montmorillonite: A Study on Sorption Kinetics

Adsorptive Removal of Antimony (III) Using Modified Montmorillonite: A Study on Sorption Kinetics

Fabrication of FeOOH hollow microboxes for purification of heavy metal-contaminated water

Characterization of ZrO2 Nano Particles Prepared by Glycothermal Method and their Efficiency as Adsorbent of As(III) and As(V) from Waste Water

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