Kinetic study of Cr(VI) sorption on MnO2

Bhutani, M. M.; Mitra, A. K.; Kumari, Ramesh

doi:10.1007/bf02039779

Cited by 22 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The negative values of DG8 (À1.402-À3.231 kJ/mol) show that Cr(VI) adsorption to MIO-MWCNTs was spontaneous. Our results are in agreement with the report of Bhutani et al (1992), who examined the adsorption of Cr(VI) to manganese dioxide (MnO 2 ) in the temperature range from 30-50 8C. They reported that the amount of Cr(VI) adsorbed to MnO 2 decreased with increasing temperature, indicating the exothermic nature (DH8 ¼À35.740 kJ/mol) of the adsorption process.…”

Section: Resultssupporting

confidence: 92%

Cr(VI) Adsorption to Magnetic Iron Oxide Nanoparticle‐Multi‐Walled Carbon Nanotube Adsorbents

Lee

Kim

2016

Water Environment Research

View full text Add to dashboard Cite

The aim of this study was to investigate the Cr(VI) adsorption to magnetic iron oxide(MIO) nanoparticle- multi-walled carbon nanotubes (MWCNTs) in aqueous solutions using batch experiments. Results show that the maximum adsorption capacity of Cr(VI) to MIO-MWCNTs was 11.256 mg/g. Kinetic model analysis demonstrates that the pseudo-second-order model and Elovich model are suitable for describing the kinetic data. Thermodynamic analysis indicates that Cr(VI) adsorption to MIO-MWCNTs decreased with increasing temperature from 5-60 °C, indicating the spontaneous and exothermic nature of the sorption process. Equilibrium isotherm analysis demonstrates that the Redlich-Peterson model suitably describes the equilibrium data. In the pH experiments, Cr(VI) adsorption to MIO-MWCNTs decreased gradually from 5.70-2.13 mg/g with increasing pH from 3.0-7.3. Sequential extraction indicates that, among the five binding forms of Cr(VI) associated with MIO-MWCNTs, the predominant contributions are the fraction bound to Fe-Mn oxides (57.82%) and the residual (23.38%).

show abstract

Section: Resultssupporting

confidence: 92%

Cr(VI) Adsorption to Magnetic Iron Oxide Nanoparticle‐Multi‐Walled Carbon Nanotube Adsorbents

Lee

Kim

2016

Water Environment Research

View full text Add to dashboard Cite

show abstract

“…The rapid decomposition of Au(I)-thiosulfate is likely due to the acidic pHs enhanced by Fe 3+ ions (Feng and van Deventer, 2010). Bhutani et al (1992) examined chromate adsorption by Mn-oxides between pH 1 and pH 9. Adsorption of chromium anions was greatest at low pH values and decreased with increasing pH, reflecting the increasingly negative surface charge as pH increased.…”

Section: Synthetic Birnessite Fe(iii) and Phosphatementioning

confidence: 99%

Effect of manganese oxide minerals and complexes on gold mobilization and speciation

Brugger

Pring

et al. 2015

Chemical Geology

View full text Add to dashboard Cite

“…Moreover Cr(VI) is also sorbed on the MnO 2 surface. Bhutani et al [27] reported that the chromate ions have a strong affinity for the surface of manganese dioxide and suggested the sorption process takes place by a mechanism of ligand exchange. Gheju et al reported that the sorption process of Cr(VI) on MnO 2 can occur through two mechanisms: physical (non-specific adsorption, electrostatic interactions) and chemical (specific adsorption, chemical interactions).…”

Section: Introductionmentioning

confidence: 99%

Application of MnO2Resin and Dowex 1X8 manganese dioxide impregnated resin for the separation of chromium from biological samples

Zuba

Polkowska-Motrenko

2019

J Radioanal Nucl Chem

View full text Add to dashboard Cite

MnO2Resin and Dowex 1X8 manganese dioxide impregnated resin was used for chromium separation from biological samples. We examined sorption of chromium from acid solutions: hydrochloric, nitric and sulphuric in concentration range from 0.01 to 2 mol/dm3. The sorption process was evaluated by batch and column experiments. We also examined sorption of other elements in the developed systems, to check the selectivity of the process. Determination of chromium by radiochemical neutron activation analysis after separation with MnO2Resin was described.

show abstract

Kinetic study of Cr(VI) sorption on MnO2

Cited by 22 publications

References 15 publications

Cr(VI) Adsorption to Magnetic Iron Oxide Nanoparticle‐Multi‐Walled Carbon Nanotube Adsorbents

Cr(VI) Adsorption to Magnetic Iron Oxide Nanoparticle‐Multi‐Walled Carbon Nanotube Adsorbents

Effect of manganese oxide minerals and complexes on gold mobilization and speciation

Application of MnO2Resin and Dowex 1X8 manganese dioxide impregnated resin for the separation of chromium from biological samples

Contact Info

Product

Resources

About