Adsorption of antimony(V) onto Mn(II)-enriched surfaces of manganese-oxide and Fe Mn binary oxide

Liu, Ruiping; Xu, Wei; He, Zan; Lan, Huachun; Liu, Huijuan; Qu, Jiuhui; Prasai, Tista

doi:10.1016/j.chemosphere.2015.07.039

Cited by 97 publications

(18 citation statements)

References 37 publications

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“…The observed decrease of the IEP value during adsorption is proposed to be due to an inner-sphere complexation of Sb(OH) 6 À . 26,52,53 Essington and Stewart 54 suggested that Sb(V) adsorption on gibbsite, Al(OH) 3 , would happen through both inner-and outer-sphere complexation reactions (5) and 6, respectively, presented below for zirconia:…”

Section: Structural and Chemical Analysismentioning

confidence: 99%

Submicron fibers as a morphological improvement of amorphous zirconium oxide particles and their utilization in antimonate (Sb(v)) removal

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Section: Structural and Chemical Analysismentioning

confidence: 99%

Submicron fibers as a morphological improvement of amorphous zirconium oxide particles and their utilization in antimonate (Sb(v)) removal

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“…The elemental Mn within FMBO showed the mixed chemical valence of +IV and +III, and the existence of Mn 2 O 3 due to the conproportionation reactions between Mn 2+ and MnO 2 [23]. The adsorption of Sb(V) was achieved by the formation of inner-sphere complexes, and the substitution of O Mn groups on the FMBO surface played an important role [24]. In the presence of divalent cations, they tended to form surface complexes with Mn oxide (Eq.…”

Section: Xps Characterizationmentioning

confidence: 99%

Simultaneous removal of Cd(II) and Sb(V) by Fe–Mn binary oxide: Positive effects of Cd(II) on Sb(V) adsorption

Liu

et al. 2015

Journal of Hazardous Materials

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h i g h l i g h t s• Fe-Mn binary oxide achieves the simultaneous removal of Cd(II) and Sb(V).• Cd(II) at above 0.25 mmol/L improves Sb(V) adsorption onto FMBO.• Cd(II) improves more significant Sb(V) adsorption than Ca 2+ and Mn 2+ .• Sb(V) adsorption decreases whereas Cd(II) adsorption increases with elevated pH.• The increased -potential and The coexistence of cadmium ion (Cd(II)) and antimonate (Sb(V)) creates the need for their simultaneous removal. This study aims to investigate the effects of positively-charged Cd(II) on the removal of negative Sb(V) ions by Fe-Mn binary oxide (FMBO) and associated mechanisms. The maximum Sb(V) adsorption density (Q max,Sb(V) ) increased from 1.02 to 1.32 and 2.01 mmol/g in the presence of Cd(II) at 0.25 and 0.50 mmol/L. Cd 2+ exhibited a more significant positive effect than both calcium ion (Ca 2+ ) and manganese ion (Mn 2+ ). Cd 2+ showed higher affinity towards FMBO and increased its -potential more significantly compared to Ca 2+ and Mn 2+ . The simultaneous adsorption of Sb(V) and Cd(II) onto FMBO can be achieved over a wide initial pH (pH i ) range from 2 to 9, and Q Sb(V) decreases whereas Q Cd(II) increases with elevated pH i . Their combined values, as expressed by Q Sb(V)+Cd(II) , amount to about 2 mmol/g and vary slightly in the pH i range 4-9. FTIR and XPS spectra indicate the significant synergistic effect of Cd(II) on Sb(V) adsorption onto FMBO, and that little chemical valence transformation occurs. These results may be valuable for the treatment of wastewater with coexisting heavy metals such as Cd(II) and Sb(V).

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“…10 However, above the value of the zero charge, the surface of the iron oxides on the corrosion layer could be coated with negative groups, which decreased the adsorption by the repulsive electrostatic forces according to the reaction:^FeOH 4^Fe-O À + H + ; such adsorption behavior was also detected by previous researchers. 10,18 The Sb(III) mainly exists as H 3 SbO 3 and Sb(OH…”

Section: Effect Of Ph On the Adsorption Processmentioning

confidence: 99%

“…Additionally, some magnetic iron oxides and metal-doped ferrites were synthesized to remove the antimony in wastewater. 9,10 Previous researchers synthesized validated iron oxy-hydroxide (FeOOH) and amorphous Fe 3 O 4 /FeOOH nanocomposite for the removal of Sb(III) and Sb(V) from drinking water with an Sb level below the regulation limit of 5 mg L À11 . In recent years, the zero-valent iron (Fe 0 ) has drawn increasing attention as an effective remediation medium for many contaminants and was considered to be promising and costeffective.…”

Section: Introductionmentioning

confidence: 99%

Adsorption performance of antimony by modified iron powder

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Adsorption of antimony(V) onto Mn(II)-enriched surfaces of manganese-oxide and Fe Mn binary oxide

Cited by 97 publications

References 37 publications

Submicron fibers as a morphological improvement of amorphous zirconium oxide particles and their utilization in antimonate (Sb(v)) removal

Submicron fibers as a morphological improvement of amorphous zirconium oxide particles and their utilization in antimonate (Sb(v)) removal

Simultaneous removal of Cd(II) and Sb(V) by Fe–Mn binary oxide: Positive effects of Cd(II) on Sb(V) adsorption

Adsorption performance of antimony by modified iron powder

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