Reductive removal of Cr(VI) by starch-stabilized Fe0 nanoparticles in aqueous solution

L. Alidokht; A. R. Khataee; A. Reyhanitabar; S. Oustan

doi:10.1016/j.desal.2010.11.028

Reductive removal of Cr(VI) by starch-stabilized Fe0 nanoparticles in aqueous solution

L. Alidokht, A. R. Khataee^*, A. Reyhanitabar, S. Oustan

^*Corresponding author for this work

University of Tabriz

Research output: Contribution to journal › Article › peer-review

186 Citations (Scopus)

Abstract

A comparative study of hexavalent chromium (Cr(VI)) removal from aqueous solution using Fe⁰ and Fe₃O₄ particles in nano and micro-scale was performed. Our results indicated that the Cr(VI) removal efficiency using starch-stabilized Fe⁰ nanoparticles, nonstabilized Fe⁰ nanoparticles, Fe₃O₄ nanoparticles, Fe⁰ and Fe₃O₄ microparticles was 99.25%, 60.4%, 9.13%, 6.92% and 6.17%, respectively. Results revealed that the Cr(VI) removal efficiency using Fe₃O₄ particles was highly dependent on pH with maximum removal efficiency at pH 3. The stabilized Fe⁰ nanoparticles efficiently remove Cr(VI) from aqueous solution in a wide pH range. In the present of Fe⁰ nanoparticles, increasing the initial Cr(VI) concentration from 10 to 50mg/L decreased removal efficiency and observed pseudo-first order rate constant (k_obs) from 100% to 56.4%, and 0.101 to 0.015min^-1, respectively. Increasing Fe⁰ nanoparticles dosage from 0.1 to 2g/L increased k_obs value from 0.028 to 0.110min^-1 and led to a 60% increase in the removal efficiency. The reaction rate constant decreased from 0.075 to 0.043min^-1 with increasing pH from 3 to 9, respectively. Our results suggest that stabilized Fe⁰ nanoparticles may serve as an effective agent for reductive removal of Cr(VI) from contaminated waters.

Original language	English
Pages (from-to)	105-110
Number of pages	6
Journal	Desalination
Volume	270
Issue number	1-3
DOIs	https://doi.org/10.1016/j.desal.2010.11.028
Publication status	Published - 1 Apr 2011
Externally published	Yes

Keywords

Chemical reduction
Chromium removal
Fe3O4 nanoparticles
Wastewater treatment
Zerovalent iron

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.desal.2010.11.028

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title = "Reductive removal of Cr(VI) by starch-stabilized Fe0 nanoparticles in aqueous solution",

abstract = "A comparative study of hexavalent chromium (Cr(VI)) removal from aqueous solution using Fe0 and Fe3O4 particles in nano and micro-scale was performed. Our results indicated that the Cr(VI) removal efficiency using starch-stabilized Fe0 nanoparticles, nonstabilized Fe0 nanoparticles, Fe3O4 nanoparticles, Fe0 and Fe3O4 microparticles was 99.25%, 60.4%, 9.13%, 6.92% and 6.17%, respectively. Results revealed that the Cr(VI) removal efficiency using Fe3O4 particles was highly dependent on pH with maximum removal efficiency at pH 3. The stabilized Fe0 nanoparticles efficiently remove Cr(VI) from aqueous solution in a wide pH range. In the present of Fe0 nanoparticles, increasing the initial Cr(VI) concentration from 10 to 50mg/L decreased removal efficiency and observed pseudo-first order rate constant (kobs) from 100% to 56.4%, and 0.101 to 0.015min-1, respectively. Increasing Fe0 nanoparticles dosage from 0.1 to 2g/L increased kobs value from 0.028 to 0.110min-1 and led to a 60% increase in the removal efficiency. The reaction rate constant decreased from 0.075 to 0.043min-1 with increasing pH from 3 to 9, respectively. Our results suggest that stabilized Fe0 nanoparticles may serve as an effective agent for reductive removal of Cr(VI) from contaminated waters.",

keywords = "Chemical reduction, Chromium removal, Fe3O4 nanoparticles, Wastewater treatment, Zerovalent iron",

author = "L. Alidokht and Khataee, {A. R.} and A. Reyhanitabar and S. Oustan",

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AU - Alidokht, L.

AU - Khataee, A. R.

AU - Reyhanitabar, A.

AU - Oustan, S.

PY - 2011/4/1

Y1 - 2011/4/1

N2 - A comparative study of hexavalent chromium (Cr(VI)) removal from aqueous solution using Fe0 and Fe3O4 particles in nano and micro-scale was performed. Our results indicated that the Cr(VI) removal efficiency using starch-stabilized Fe0 nanoparticles, nonstabilized Fe0 nanoparticles, Fe3O4 nanoparticles, Fe0 and Fe3O4 microparticles was 99.25%, 60.4%, 9.13%, 6.92% and 6.17%, respectively. Results revealed that the Cr(VI) removal efficiency using Fe3O4 particles was highly dependent on pH with maximum removal efficiency at pH 3. The stabilized Fe0 nanoparticles efficiently remove Cr(VI) from aqueous solution in a wide pH range. In the present of Fe0 nanoparticles, increasing the initial Cr(VI) concentration from 10 to 50mg/L decreased removal efficiency and observed pseudo-first order rate constant (kobs) from 100% to 56.4%, and 0.101 to 0.015min-1, respectively. Increasing Fe0 nanoparticles dosage from 0.1 to 2g/L increased kobs value from 0.028 to 0.110min-1 and led to a 60% increase in the removal efficiency. The reaction rate constant decreased from 0.075 to 0.043min-1 with increasing pH from 3 to 9, respectively. Our results suggest that stabilized Fe0 nanoparticles may serve as an effective agent for reductive removal of Cr(VI) from contaminated waters.

AB - A comparative study of hexavalent chromium (Cr(VI)) removal from aqueous solution using Fe0 and Fe3O4 particles in nano and micro-scale was performed. Our results indicated that the Cr(VI) removal efficiency using starch-stabilized Fe0 nanoparticles, nonstabilized Fe0 nanoparticles, Fe3O4 nanoparticles, Fe0 and Fe3O4 microparticles was 99.25%, 60.4%, 9.13%, 6.92% and 6.17%, respectively. Results revealed that the Cr(VI) removal efficiency using Fe3O4 particles was highly dependent on pH with maximum removal efficiency at pH 3. The stabilized Fe0 nanoparticles efficiently remove Cr(VI) from aqueous solution in a wide pH range. In the present of Fe0 nanoparticles, increasing the initial Cr(VI) concentration from 10 to 50mg/L decreased removal efficiency and observed pseudo-first order rate constant (kobs) from 100% to 56.4%, and 0.101 to 0.015min-1, respectively. Increasing Fe0 nanoparticles dosage from 0.1 to 2g/L increased kobs value from 0.028 to 0.110min-1 and led to a 60% increase in the removal efficiency. The reaction rate constant decreased from 0.075 to 0.043min-1 with increasing pH from 3 to 9, respectively. Our results suggest that stabilized Fe0 nanoparticles may serve as an effective agent for reductive removal of Cr(VI) from contaminated waters.

KW - Chemical reduction

KW - Chromium removal

KW - Fe3O4 nanoparticles

KW - Wastewater treatment

KW - Zerovalent iron

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ER -

Reductive removal of Cr(VI) by starch-stabilized Fe0 nanoparticles in aqueous solution

Abstract

Keywords

UN SDGs

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