Adsorption of arsenite on amorphous iron hydroxide from dilute aqueous solution

Pierce, Matthew L.; Moore, C. B.

doi:10.1021/es60162a011

Cited by 236 publications

(115 citation statements)

References 4 publications

Supporting

Mentioning

105

Contrasting

Unclassified

Order By: Relevance

“…Aeration of Fe-rich water will precipitate Fe oxyhydroxide which will, in turn, coprecipitate some of the As from solution (Pierce and Moore, 1980). Water treatment methods based upon this process have been described by Jekel (1994), Joshi and Chaudhuri (1996), Bhattacharaya et al (1997) and Sa®ullah (1998) and show promise for local use.…”

Section: Water Treatmentmentioning

confidence: 99%

Mechanism of arsenic release to groundwater, Bangladesh and West Bengal

Nickson

McArthur

Ravenscroft³

et al. 2000

Applied Geochemistry

1,164

626

View full text Add to dashboard Cite

In some areas of Bangladesh and West Bengal, concentrations of As in groundwater exceed guide concentrations, set internationally and nationally at 10 to 50 mg l À1 and may reach levels in the mg l À1 range. The As derives from reductive dissolution of Fe oxyhydroxide and release of its sorbed As. The Fe oxyhydroxide exists in the aquifer as dispersed phases, such as coatings on sedimentary grains. Recalculated to pure FeOOH, As concentrations in this phase reach 517 ppm. Reduction of the Fe is driven by microbial metabolism of sedimentary organic matter, which is present in concentrations as high as 6% C. Arsenic released by oxidation of pyrite, as water levels are drawn down and air enters the aquifer, contributes negligibly to the problem of As pollution. Identi®cation of the mechanism of As release to groundwater helps to provide a framework to guide the placement of new water wells so that they will have acceptable concentrations of As. #

show abstract

Section: Water Treatmentmentioning

confidence: 99%

Mechanism of arsenic release to groundwater, Bangladesh and West Bengal

Nickson

McArthur

Ravenscroft³

et al. 2000

Applied Geochemistry

1,164

626

View full text Add to dashboard Cite

show abstract

“…Bowell, 1994). These Fe(III)-rich weathering products, which are ecacious scavengers of As oxyanions (Pierce and Moore, 1980;Aggett and O'Brien, 1985;Peterson and Carpenter, 1986), contain up to H2000 ppm As. The present study employs bulk chemical (X-ray¯uorescence; inductively-coupled plasma atomic emission spectroscopy) and mineralogical (electron probe microanalysis; X-ray diraction; transmission electron microscopy) analyses to characterize the distribution of As in rocks, sul®de minerals (arsenian pyrite) and secondary phases produced during weathering (goethite and jarosite).…”

Section: Introductionmentioning

confidence: 99%

Arsenic speciation in pyrite and secondary weathering phases, Mother Lode Gold District, Tuolumne County, California

Savage

Tingle

O’Day

et al. 2000

Applied Geochemistry

377

126

View full text Add to dashboard Cite

Arsenian pyrite, formed during Cretaceous gold mineralization, is the primary source of As along the Melones fault zone in the southern Mother Lode Gold District of California. Mine tailings and associated weathering products from partially submerged inactive gold mines at Don Pedro Reservoir, on the Tuolumne River, contain H20±1300 ppm As. The highest concentrations are in weathering crusts from the Clio mine and nearby outcrops which contain goethite or jarosite. As is concentrated up to 2150 ppm in the ®ne-grained (<63 mm) fraction of these Fe-rich weathering products.Individual pyrite grains in albite-chlorite schists of the Clio mine tailings contain an average of 1.2 wt.% As. Pyrite grains are coarsely zoned, with local As concentrations ranging from H0 to 5 wt.%. Electron microprobe, transmission electron microscope, and extended X-ray absorption ®ne-structure spectroscopy (EXAFS) analyses indicate that As substitutes for S in pyrite and is not present as inclusions of arsenopyrite or other As-bearing phases. Comparison with simulated EXAFS spectra demonstrates that As atoms are locally clustered in the pyrite lattice and that the unit cell of arsenian pyrite is expanded by H2.6% relative to pure pyrite. During weathering, clustered substitution of As into pyrite may be responsible for accelerating oxidation, hydrolysis, and dissolution of arsenian pyrite relative to pure pyrite in weathered tailings. Arsenic K-edge EXAFS analysis of the ®ne-grained Ferich weathering products are consistent with corner-sharing between As(V) tetrahedra and Fe(III)-octahedra. Determinations of nearest-neighbor distances and atomic identities, generated from least-squares ®tting algorithms to spectral data, indicate that arsenate tetrahedra are sorbed on goethite mineral surfaces but substitute for SO 4 in jarosite. Erosional transport of As-bearing goethite and jarosite to Don Pedro Reservoir increases the potential for As mobility and bioavailability by desorption or dissolution. Both the substrate minerals and dissolved As species are expected to respond to seasonal changes in lake chemistry caused by thermal strati®cation and turnover within the monomictic Don Pedro Reservoir. Arsenic is predicted to be most bioavailable and toxic in the reservoir's summer hypolimnion. 7

show abstract

“…Amorphous ferric hydroxide (Fe(OH) 3 ) has been ordinarily used as an adsorbent in contaminated water, in pigments, and in pharmaceutical preparations. 30 Furthermore, ferric hydroxide is just frequently used as a facile precursor to synthesis various iron oxides/oxyhydroxides utilizing in many environmental and biological applications. [31][32][33][34][35][36] In particular, to the best of our knowledge, the spectroscopic properties of amorphous ferric hydroxide at NIR regions have not been reported yet.…”

Section: -29mentioning

confidence: 99%

Novel optical properties of amorphous ferric hydroxide in near infrared region

Kang¹,

Chae²

2015

Rapid Communication in Photoscience

View full text Add to dashboard Cite

New spectroscopic characteristics of amorphous ferric hydroxide (Fe(OH) 3 ), interestingly in the near infrared (NIR) region, are presented in this study. The absorption spectrum of ferric hydroxide covers wide spectral regions from ultraviolet to NIR (200 ~ 900 nm). Unique emission bands were newly observed in the NIR regions (800 ~ 1400 nm). Several bands of this NIR emission are quiet well overlapped with the combinational vibrational absorption bands of water. From photothermal conversion study, very interestingly, temperature of aqueous mixture solution including the amorphous ferric hydroxide was significantly increased from ambient temperature to 38 °C for 30 minutes under irradiation of a standard helium lamp.Thermal therapy is one of the popular therapeutic approaches to treat various medical conditions, such as desensitizing neuralgia, [1][2][3] obstructive tonsillar hypertrophy, 4 and killing malignant tumor.5-9

show abstract

Adsorption of arsenite on amorphous iron hydroxide from dilute aqueous solution

Cited by 236 publications

References 4 publications

Mechanism of arsenic release to groundwater, Bangladesh and West Bengal

Mechanism of arsenic release to groundwater, Bangladesh and West Bengal

Arsenic speciation in pyrite and secondary weathering phases, Mother Lode Gold District, Tuolumne County, California

Novel optical properties of amorphous ferric hydroxide in near infrared region

Contact Info

Product

Resources

About