Montmorillonite-supported nanoscale zero-valent iron for removal of arsenic from aqueous solution: Kinetics and mechanism

Bhowmick, Subhamoy; Chakraborty, Sudipta; Mondal, Priyanka; Renterghem, W. Van; Berghe, S. Van den; Román-Ross, Gabriela; Chatterjee, Debashis; Iglesías, Mònica

doi:10.1016/j.cej.2013.12.049

Cited by 324 publications

(123 citation statements)

References 45 publications

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“…The composite materials have successfully eliminated aggregation and nZVI particles are well dispersed within the zeolite matrix (Kim et al, 2013). nZVI particles also showed less aggregation and better dispersion with the enhancement of montmorillonite (Bhowmick et al, 2014;Yuan et al, 2009).…”

Section: Introductionmentioning

confidence: 89%

Synthesis and Characterization of Marine Clay-Supported Nano Zero Valent Iron

How¹,

Yaacob²

2015

American Journal of Environmental Sciences

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This study reports the preparation and characterization of marine clay nano zero valent iron (MC+nZVI) where marine clay acts as the composite material. Marine clay was air dried and pulverized before used. Basically, MC+nZVI was synthesized by chemical reduction method. The materials synthesized were left oven dried overnight at 50°C. The obtained materials were characterized by Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), X-Ray Diffraction (XRD) and Fourier Transform Infrared (FTIR). FESEM images show that the nZVI particles dispersed well on the surface of marine clay thus reducing aggregation of nZVI. TEM images show that the particles have the shell-core structure and the particles sizes were around 29.92-57.11 nm for MC+nZVI. XPS spectrums indicate the existence of Fe 0 on the synthesized MC+nZVI. Other than that, XRD and FTIR results also show that there exists the formation of iron oxides on the surface of MC+nZVI. The adsorption capability of MC+nZVI is increased by 15% compared to marine clay. Therefore, increment of MC+nZVI adsorption capacity might be due to the welldispersed nZVI thus enhancing the performance of MC+nZVI.

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Section: Introductionmentioning

confidence: 89%

Synthesis and Characterization of Marine Clay-Supported Nano Zero Valent Iron

How¹,

Yaacob²

2015

American Journal of Environmental Sciences

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“…2b shows the IBNs synthesized in this work; it can be observed that these nanoparticles are spherical having particle sizes from 50 to 100 nm. Agglomeration of the IBNs occurs due to the magnetic properties mainly [21,23]. This agglomeration decreases considerably Fig.…”

Section: Morphologymentioning

confidence: 99%

Characterization of natural zeolite clinoptilolite for sorption of contaminants

et al. 2015

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The nanoparticles technology has received considerable attention for its potential applications in groundwater treatment for the removal of various pollutants as Cadmium. In this work, iron boride nanoparticles were synthesized in pure form and in presence of homo-ionized zeolite clinoptilolite, as support material. These materials were used for removing Cd (II) from aqueous solutions containing 10, 50, 100, 150, 200, 250, 400 mg/L. The characterization of these materials was made by using X-ray Diffraction, Scanning Electron Microscopy and Mössbauer Spectroscopy. Pure iron boride particles show a broad X-ray diffraction peak centered at 45 • (2θ ), inferring the presence of nanocrystals of Fe 2 B as identified from Mössbauer Spectroscopy. The size of these Fe 2 B particles was within the range of 50 and 120 nm. The maximum sorption capacities for Cd (II) of iron boride particles and supported iron boride particles in homo-ionized zeolitic material were nearly 100 %. For homo-ionized zeolite and homo-ionized zeolite plus sodium borohydride was ≥ 95 %.

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“…Hence, applying natural clay to support metal oxides to enhance the adsorption capacity is needed. Of the metal oxides, iron oxide and elemental iron are well known for high affinity and adsorption capacity to arsenic and widely used to remediate arsenic from water; however, application in powder forms of those metal oxides expresses a difficulty of liquid and solid separation after adsorption process and it is very expensive to synthesize for large scale application (Bhowmick et al, 2014;Dousova et al, 2009;Sigdel et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Clay supported metal oxides has been proved to remove some pollutants through various studies such as Pb(II) and Zn(II) removal by ceramisite produced from bentonite, iron powder, and activated carbon (Yuan and Liu, 2013); As(V) adsorption on adsorbents made from clay, iron oxide, and starch (Chen et al, 2010); Cr(VI) and As(V) removal by zero-valent iron and iron oxide-coated sand adsorbent (Mak et al, 2011); As(III) and As(V) removal by montmorillonite-supported zero valent iron (Bhowmick et al, 2014); and As removal by iron mixed ceramic pellet (Shafiquzzam et al, 2013). However, application of a systematic method to determine optimal proportion of each material for more effective adsorbent to remove both As(III) and As(V) is still limited.…”

Section: Introductionmentioning

confidence: 99%

Development of low-cost iron mixed porous pellet adsorbent by mixture design approach and its application for arsenate and arsenite adsorption from water

Wichitsathian

Yossapol

et al. 2017

Adsorption Science & Technology

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In this study, natural clay, iron oxide, and iron powder were combined to develop low-cost iron mixed porous pellet adsorbent for arsenate and arsenite removal from aqueous solution in batch experiments. The augmented simplex centroid mixture design was applied to obtain the optimum proportion of each constituent. Higher correlation coefficient of the models (R 2 > 0.95), good distribution of residuals, and lower values of p value (<0.05) indicated that the method is suitable for determining the optimum mixture proportion. Extensive decrease of both arsenate and arsenite adsorption occurred in the alkaline condition (pH > 9). Kinetic and isotherm experimental data of both arsenate and arsenite were well described by the pseudo-second order and Sips models, respectively. The maximum adsorption capacity of arsenate and arsenite derived from Sips model were 13.33 and 19.06 mg/g, respectively. The separation and heterogeneity factors showed that both arsenate and arsenite were favorably adsorbed. Among coexisting anions, phosphate significantly showed negative effect on the adsorption of either arsenate or arsenite. The adsorbent could be effectively reused for several times after its regeneration and was considered as non-hazardous material after adsorption.

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Montmorillonite-supported nanoscale zero-valent iron for removal of arsenic from aqueous solution: Kinetics and mechanism

Cited by 324 publications

References 45 publications

Synthesis and Characterization of Marine Clay-Supported Nano Zero Valent Iron

Synthesis and Characterization of Marine Clay-Supported Nano Zero Valent Iron

Characterization of natural zeolite clinoptilolite for sorption of contaminants

Development of low-cost iron mixed porous pellet adsorbent by mixture design approach and its application for arsenate and arsenite adsorption from water

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