XPS studies on the electronic structure of bonding between solid and solutes: adsorption of arsenate, chromate, phosphate, Pb2+, and Zn2+ ions on amorphous black ferric oxyhydroxide

Ding, Mei; Jong, B.H.W.S. de; Roosendaal, S. J.; Vredenberg, A. M.

doi:10.1016/s0016-7037(99)00386-5

Cited by 171 publications

(97 citation statements)

References 23 publications

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“…[44,45]. They can be shifted up to 44.6 ± 0.13 eV for As(III) and 46.0 ± 0.17 eV for As(V) when the arsenic anions or molecules are adsorbed onto iron oxide [46]. It can therefore be concluded that the arsenic species adsorbed onto the surface of the Fe-Zr oxide after the binding of As(V) and As(III) still remain as As(V) and As(III), respectively.…”

Section: Analysis Of Xps and Ftir Spectramentioning

confidence: 99%

Adsorptive removal of arsenic from water by an iron–zirconium binary oxide adsorbent

Ren

Zhang

Chen

2011

Journal of Colloid and Interface Science

251

100

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a b s t r a c tArsenate and arsenite may exist simultaneously in groundwater and have led to a greater risk to human health. In this study, an iron-zirconium (Fe-Zr) binary oxide adsorbent for both arsenate and arsenite removal was prepared by a coprecipitation method. The adsorbent was amorphous with a specific surface area of 339 m 2 /g. It was effective for both As(V) and As(III) removal; the maximum adsorption capacities were 46.1 and 120.0 mg/g at pH 7.0, respectively, much higher than for many reported adsorbents. Both As(V) and As(III) adsorption occurred rapidly and achieved equilibrium within 25 h, which were well fitted by the pseudo-second-order equation. Competitive anions hindered the sorption according to the sequence PO 4 . The ionic strength effect experiment, measurement of zeta potential, and FTIR study indicate that As(V) forms inner-sphere surface complexes, while As(III) forms both inner-and outer-sphere surface complexes at the water/Fe-Zr binary oxide interface. The high uptake capability and good stability of the Fe-Zr binary oxide make it a potentially attractive adsorbent for the removal of both As(V) and As(III) from water.

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Section: Analysis Of Xps and Ftir Spectramentioning

confidence: 99%

Adsorptive removal of arsenic from water by an iron–zirconium binary oxide adsorbent

Ren

Zhang

Chen

2011

Journal of Colloid and Interface Science

251

100

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“…The binding energy of Mn2p 3/2 of original Zr-Mn binary hydrous oxide is 642.03 eV. It was reported that the Mn2p 3/2 binding energy of birnessite was 642.0 ± 0.1 eV [39], which suggested that the Mn oxide in the Zr-Mn binary oxide was mainly MnO 2 . After reaction with As(V), the binding energy is 642.01 eV and had almost no change, whereas an obvious shift in the binding energy (from 642.03 to 641.66 eV) is observed after reaction with As(III).…”

mentioning

confidence: 97%

“…This might be ascribed to an increase in the reduced Mn species at the surfaces of the Zr-Mn binary hydrous oxide. Nesbitt and Banerjee analyzed thoroughly the Mn2p spectra of Mn oxyhydroxides and found that binding energies of Mn(IV), Mn(III), and Mn(II) species were very close to each other and the binding energy of Mn with low oxidization state located on the low energy levels [39,40].…”

mentioning

confidence: 99%

Simultaneous removal of arsenate and arsenite by a nanostructured zirconium–manganese binary hydrous oxide: Behavior and mechanism

Zhang

Khorshed

Chen

2013

Journal of Colloid and Interface Science

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“…Among these technologies, phosphorus adsorption to solid substrates has been widely used and is considered as an effective process. Iron oxyhydroxide adsorbents can achieve high P-removal efficiency because of the strong affinity of the phosphate anions with ferric metal centers [8][9][10][11]. However, the conventional micron-sized coagulants suffer from several drawbacks, such as limited P-removal efficiency and difficulties of sludge handling and disposal because of their massive volumes.…”

Section: Introductionmentioning

confidence: 99%

Production of High-purity Magnetite Nanoparticles from a Low-grade Iron Ore via Solvent Extraction

Suh¹,

May²,

Kil³

et al. 2015

Korean Chemical Engineering Research

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− We produced magnetite nanoparticles (MNPs) and a Mg-rich solution as a nano-adsorbent and a coagulant for water treatment, respectively, using a low-grade iron ore. The ore was leached with aqueous hydrochloric acid and its impurities were removed by solvent extraction of the leachate using tri-n-butyl phosphate as an extractant. The content of Si and Mg, which inhibit the formation of MNPs, was reduced from 10.3 wt% and 15.5 wt% to 28.1 mg/L and < 1.4 mg/L, respectively. Consequently, the Fe content increased from 68.6 wt% to 99.8 wt%. The high-purity Fe 3+ solution recovered was used to prepare 5-15-nm MNPs by coprecipitation. The wastewater produced contained a large amount of Mg 2+ and can be used to precipitate struvite in sewage treatment. This process helps reduce the cost of both sewage and iron-orewastewater treatments, as well as in the economic production of the nano-adsorbent.

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XPS studies on the electronic structure of bonding between solid and solutes: adsorption of arsenate, chromate, phosphate, Pb2+, and Zn2+ ions on amorphous black ferric oxyhydroxide

Cited by 171 publications

References 23 publications

Adsorptive removal of arsenic from water by an iron–zirconium binary oxide adsorbent

Adsorptive removal of arsenic from water by an iron–zirconium binary oxide adsorbent

Simultaneous removal of arsenate and arsenite by a nanostructured zirconium–manganese binary hydrous oxide: Behavior and mechanism

Production of High-purity Magnetite Nanoparticles from a Low-grade Iron Ore via Solvent Extraction

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