Untitled

Walanda, Daud K.; Burns, Robert C.; Lawrance, Geoffrey A.; Nagy‐Felsobuki, Ellak I. von

doi:10.1023/a:1009098627616

Cited by 42 publications

(29 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is apparent that the corrosion of manganese oxide ore in the treated wastewater produces a film covering the surface of ore. These results attempt to state that the reaction between manganese oxide and unmanageable contaminant carry out relying on the formation of MnOÁOH which is a more stronger oxidizing irritant [21]. So, this route could be listed as:…”

Section: Mott-schottky Plot Analysismentioning

confidence: 99%

Electrochemical Behavior of Manganese Oxide Ores Using Coke Wastewater in Sulfuric Acid Solution

Kang

Feng

et al. 2019

Env Prog and Sustain Energy

View full text Add to dashboard Cite

The coke wastewater reductive leaching of pyrolusite ore in sulfuric acid solution was studied. This study was performed in two stages. First, the influence of tractable and refractory pollutants of coke wastewater on manganese leaching was determined. It was shown that the leaching efficiency of manganese is very sensitive to the decomposition of intractable pollutants. With the decrease of 1.85 g/L CODcr value of those contaminants, the extraction ratio of manganese increased more than 16% and exceeded 97.3%. Second, the corrosion behavior of pyrolusite ore in simulative wastewater solution was investigated using cyclic voltammograms, polarization curves, and Mott–Schottky curves. The reduction of manganese oxide ore by recalcitrant organic compounds involves two courses—the inducing conversion of manganese oxide to MnO·OH intermediate with hydrogen and free electron, which is from the oxidation of easily oxidized substances and the oxidation of persistent organic matter by this derivative. As a consequence, the latter process leads to the increment in manganese extraction efficiency. Coke wastewater is a promising reducing agent for MnO2. Likewise, it could be clarified and recycling. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13039, 2019

show abstract

Section: Mott-schottky Plot Analysismentioning

confidence: 99%

Electrochemical Behavior of Manganese Oxide Ores Using Coke Wastewater in Sulfuric Acid Solution

Kang

Feng

et al. 2019

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…The naturally occurring relative abundances of the elements studied are as follows: 92 6,153 Eu/100.0; 169 Tm/100.0. The identities and charges of species were assigned by peak separation and experimental/computed isotopic pattern comparisons.…”

Section: Esi/msmentioning

confidence: 99%

“…10) The appearance of Ln(III)PMo 10 O 35 2− as the dominant ion occurs across the Ln series. While the main features remain invariant, Ln(III)PMo 11 O 382− is most prominent for Ce and clearly decreases in relative abundance across the series; the opposite is true for the smaller Ln-phosphomolybdate species, LnPMo6 …”

mentioning

confidence: 94%

“…The complex behavior of iso-and heteropolyoxometalates during transference from solution to gas has been determined from investigations via electrospray ionization mass spectrometry (ESI/MS) [2][3][4][5][6][7][8][9][10][11]. ESI, while a "soft" process in principle, has the potential to cause structural and chemical transformations of solution species during ion formation and transport.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrospray ionization mass spectrometry of a cerium(III) phosphomolybdate complex: Condensed and gas-phase cluster chemistry

Bray

Copping

Shuh

et al. 2011

International Journal of Mass Spectrometry

View full text Add to dashboard Cite

“…However, given the range of pH values involved in this protonation, together with the observation that α-[H 2 W 12 O 40 ] 6-(p/q 1.5) and [W 10 (2) and involves, after addition of two water molecules, the loss of an [HWO 4 ]ion, the primary source of the aggregation units of the iso-and hetero-polytungstates. 36 The formation of [H 4 W 11 O 38 ] 6-(ψ-metatungstate), which is the solid actually isolated from soluble [H 7 W 11 O 40 ] 7-, is given by equation (3), which is a simple reaction involving the elimination of two water molecules following protonation.…”

Section: Location Of the Hydrogen Atoms In The [H 3 W 12 O 42 ] 9-ionmentioning

confidence: 99%

Crystal Structure of Na9[H3W12O42]·24H2O, a Compound Containing the Protonated Paratungstate B Anion ('Acid Paratungstate'), and Cyclic Voltammetry of Acidified [H2W12O42]10- Solutions

Nolan¹,

Wilkes²,

Hambley³

et al. 1999

Aust. J. Chem.

Self Cite

View full text Add to dashboard Cite

Crystallization of a solid at pH 4.0 from an aqueous acidified Rh3+–[WO4]2− solution resulted in the isolation of Na9[H3W12O42]·24H 2 O, which contains the protonated paratungstate B anion and which is likely the species identified previously as ‘acid paratungstate’. The compound is triclinic, space group P1– , a 10.603(2), b 12.134(3), c 14.042(3) Å, α 114.78(1), β 101.84(1), γ 108.34(1)˚, V 1432.9(5) Å3 , Z 1, and the structure was solved to an R1 value of 0.0404 (wR 2 0.1108) for 5997 independent observed reflections. The anion exhibits essentially the same isopolytungstate framework as paratungstate B, [H2W12O42]10− , consisting of two W3O13 and two W3O14 structural subunits linked by shared vertices. Bond valence arguments place two of the hydrogen atoms unequivocally in the internal cavity of the anion, with the remaining hydrogen atom also likely located in this cavity, but disordered over several internal oxygen atoms. The protonation of [H2W12O42 ]10− is shown to lead to species that are electrochemically reducible. Extended-HÜckel molecular orbital calculations confirm that protonation of paratungstate B within the internal cavity leads to a change in composition of the LUMO, now based mainly on electrochemically reducible W3O13 as opposed to (essentially) non-reducible W3O14 structural subunits. This results in species that are considerably more electrochemically active than the unprotonated anion. The role of [H3W12O42]9− as an intermediate in the polymerization of [WO4]2− to give the solution form of ψ-metatungstate, [H7W11O40]7− , which crystallizes as [H4W11O38]6− , is also discussed.

show abstract

Untitled

Cited by 42 publications

References 12 publications

Electrochemical Behavior of Manganese Oxide Ores Using Coke Wastewater in Sulfuric Acid Solution

Electrochemical Behavior of Manganese Oxide Ores Using Coke Wastewater in Sulfuric Acid Solution

Electrospray ionization mass spectrometry of a cerium(III) phosphomolybdate complex: Condensed and gas-phase cluster chemistry

Crystal Structure of Na9[H3W12O42]·24H2O, a Compound Containing the Protonated Paratungstate B Anion ('Acid Paratungstate'), and Cyclic Voltammetry of Acidified [H2W12O42]10- Solutions

Contact Info

Product

Resources

About

Untitled

Cited by 42 publications

References 12 publications

Electrochemical Behavior of Manganese Oxide Ores Using Coke Wastewater in Sulfuric Acid Solution

Electrochemical Behavior of Manganese Oxide Ores Using Coke Wastewater in Sulfuric Acid Solution

Electrospray ionization mass spectrometry of a cerium(III) phosphomolybdate complex: Condensed and gas-phase cluster chemistry

Crystal Structure of Na9[H3W12O42]&middot;24H2O, a Compound Containing the Protonated Paratungstate B Anion ('Acid Paratungstate'), and Cyclic Voltammetry of Acidified [H2W12O42]10- Solutions

Contact Info

Product

Resources

About

Crystal Structure of Na9[H3W12O42]·24H2O, a Compound Containing the Protonated Paratungstate B Anion ('Acid Paratungstate'), and Cyclic Voltammetry of Acidified [H2W12O42]10- Solutions