Arsenic removal using a polymeric/inorganic hybrid sorbent

DeMarco, Matthew J.; SenGupta, Arup K.; Greenleaf, J. E.

doi:10.1016/s0043-1354(02)00238-5

Cited by 372 publications

(199 citation statements)

References 28 publications

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“…The variety of chemical environments in which O exists in the composite materials makes it difficult to provide an accurate assignment for these envelopes of peaks. Nevertheless, it is possible to mention that these features display binding energies close to those assigned earlier for O 22 in the hydroxyl groups of a-FeOOH (goethite) and c-FeOOH (lepidocrocite) reported at 531.0 eV and 531.1 eV, respectively. 61 The sorption of As(III) leads to the development of an O 1s feature centred at 529.8 eV and a shoulder centred at 533.1 eV (curve b in Fig.…”

supporting

confidence: 84%

Chitosan fiber-supported zero-valent iron nanoparticles as a novel sorbent for sequestration of inorganic arsenic

Horzum¹,

Demir²,

Nairat³

et al. 2013

RSC Adv.

123

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This study proposes a new sorbent for the removal of inorganic arsenic from aqueous solutions.Monodispersed nano zero-valent iron (nZVI) particles were nucleated at the surface of electrospun chitosan fibers (average fiber diameter of 195 ¡ 50 nm) by liquid phase reduction of FeCl 3 using NaBH 4 .The material was characterized using SEM, TGA, XPS, XRD, and FTIR. The diameter of iron nanoparticles was found to vary between 75-100 nm. A set of batch experiments were carried out to elucidate the efficiency of the composite sorbent toward fixation of arsenite and arsenate ions. The ion concentrations in the supernatant solutions were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The results revealed that the chitosan fiber supported nZVI particles is an excellent sorbent material for inorganic arsenic uptake at concentrations ranging from 0.01 to 5.00 mg L 21 over a wide range of pH values. Based on XPS analysis, As(III) was found to undergo oxidation to As(V) upon sorption, while As(V) retained its oxidation state. By virtue of the successful combination of the electrospun fibers' mechanical integrity and the large reactivity of dispersed nZVI particles, the applicability of the resulting sorbent material in arsenic sorption holds broad promise.

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supporting

confidence: 84%

Chitosan fiber-supported zero-valent iron nanoparticles as a novel sorbent for sequestration of inorganic arsenic

Horzum¹,

Demir²,

Nairat³

et al. 2013

RSC Adv.

123

View full text Add to dashboard Cite

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“…The conventional technologies for arsenic removal from waters are based on processes of coagulation, sorption, ion-exchange reactions or methods of reverse osmosis. Materials used in these processes are Fe (0), Fe (III) oxyhydroxides, Mn (II), Al (III), apatite, silicate sands, carbonates, sulphides, ash or various types of coal (Chmielewská et al, 2008;Daus et al, 2004;DeMarco et al, 2003;Hiller et al, 2007;Lin and Wu, 2001;Sato et al, 2002;Song et al, 2006). Nowadays, there is a trend to use the alternative and low-cost materials for arsenic removal from the waters in laboratory or medium-scale experiments.…”

Section: Introductionmentioning

confidence: 99%

Removal of arsenic (V) from aqueous solutions using chemically modified sawdust of spruce (Picea abies): Kinetics and isotherm studies

Urík

Littera

Ševc

et al. 2009

Int. J. Environ. Sci. Technol.

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ABSTRACT:Arsenic is a ubiquitous element in the environment and occurs naturally in both organic and inorganic forms. Under aerobic condition, the dominant form of arsenic in waters is arsenate, which is highly mobile and toxic. Arsenic poisoning from drinking water remains a serious world health issue. There are various standard methods for arsenic removal from drinking waters (coagulation, sorption, ion-exchange reactions or methods of reverse osmosis) and alternative methods, such as biosorption. Biosorption of arsenic from natural and model waters by native or chemically modified (with urea or ferric oxyhydroxides) plant biomass prepared from sawdust of Picea abies was studied. The kinetic of the adsorption process fitted well the pseudo second order adsorption model and equilibrium was achieved after 2 h. The results showed that biosorption was well described by both Langmuir and Freundlich isotherms. The maximum biosorption capacity of the sawdust modified with ferric oxyhydroxides, evaluated by Langmuir adsorption model, was 9.259 mg/g, while the biosorption capacity of unmodified biosorbent or biosorbent modified with urea was negligible. The adsorption capacity is comparable to results published by other authors, suggesting that the prepared chemically modified biosorbent has potential in remediation of contaminated waters.

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“…The most common sorbents employ an iron oxy/hydroxide surface such as Granular Ferric Hydroxide (GFH), Bayoxide E-33, iron-modified AA, iron-impregnated sand (IIS), and iron impregnated ion exchange resins (7)(8)(9)(10). The commercial sorbent GFH chosen for this work is one of the most common, iron-based ABSR.…”

Section: Introductionmentioning

confidence: 99%

Leaching of Arsenic from Granular Ferric Hydroxide Residuals under Mature Landfill Conditions

Ghosh

Mukiibi

Sáez

et al. 2006

Environ. Sci. Technol.

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Most arsenic bearing solid residuals (ABSR) from water treatment will be disposed in non-hazardous landfills. The lack of an appropriate leaching test to predict arsenic mobilization from ABSR creates a need to evaluate the magnitude and mechanisms of arsenic release under landfill conditions. This work studies the leaching of arsenic and iron from a common ABSR, granular ferric hydroxide, in a laboratory-scale column that simulates the biological and physicochemical conditions of a mature, mixed solid waste landfill. The column operated for approximately 900 days and the mode of transport as well as chemical speciation of iron and arsenic changed with column age. Both iron and arsenic were readily mobilized under the anaerobic, reducing conditions. During the early stages of operation, most arsenic and iron leaching (80% and 65%, respectively) was associated with suspended particulate matter and iron was lost proportionately faster than arsenic. In later stages, while the rate of iron leaching declined, the arsenic leaching rate increased greater than 7-fold. The final phase was characterized by dissolved species leaching. Future work on the development of standard batch leaching tests should take into account the dominant mobilization mechanisms identified in this work: solid associated transport, reductive sorbent dissolution, and microbially mediated arsenic reduction.

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Arsenic removal using a polymeric/inorganic hybrid sorbent

Cited by 372 publications

References 28 publications

Chitosan fiber-supported zero-valent iron nanoparticles as a novel sorbent for sequestration of inorganic arsenic

Chitosan fiber-supported zero-valent iron nanoparticles as a novel sorbent for sequestration of inorganic arsenic

Removal of arsenic (V) from aqueous solutions using chemically modified sawdust of spruce (Picea abies): Kinetics and isotherm studies

Leaching of Arsenic from Granular Ferric Hydroxide Residuals under Mature Landfill Conditions

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