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Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate. / Sarkar, Binoy; Naidu, Ravi; Krishnamurti, Gummuluru S. R. et al.
In: Environmental Science and Technology, Vol. 47, No. 23, 03.12.2013, p. 13629-13636.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Sarkar, B, Naidu, R, Krishnamurti, GSR & Megharaj, M 2013, 'Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate', Environmental Science and Technology, vol. 47, no. 23, pp. 13629-13636. https://doi.org/10.1021/es401568k

APA

Sarkar, B., Naidu, R., Krishnamurti, G. S. R., & Megharaj, M. (2013). Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate. Environmental Science and Technology, 47(23), 13629-13636. https://doi.org/10.1021/es401568k

Vancouver

Sarkar B, Naidu R, Krishnamurti GSR, Megharaj M. Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate. Environmental Science and Technology. 2013 Dec 3;47(23):13629-13636. Epub 2013 Nov 7. doi: 10.1021/es401568k

Author

Sarkar, Binoy ; Naidu, Ravi ; Krishnamurti, Gummuluru S. R. et al. / Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate. In: Environmental Science and Technology. 2013 ; Vol. 47, No. 23. pp. 13629-13636.

Bibtex

@article{454d0157f65446c08d2be47bec6c7962,
title = "Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate",
abstract = "Unlike lower valent iron (Fe), the potential role of lower valent manganese (Mn) in the reduction of hexavalent chromium (Cr(VI)) in soil is poorly documented. In this study, we report that citrate along with Mn(II) and clay minerals (montmorillonite and kaolinite) reduce Cr(VI) both in aqueous phase and in the presence of dissolved organic carbon (SDOC) extracted from a forest soil. The reduction was favorable at acidic pH (up to pH 5) and followed the pseudo-first-order kinetic model. The citrate (10 mM) + Mn(II) (182.02 μM) + clay minerals (3% w/v) system in SDOC accounted for complete reduction of Cr(VI) (192.32 μM) in about 72 h at pH 4.9. In this system, citrate was the reductant, Mn(II) was a catalyst, and the clay minerals acted as an accelerator for both the reductant and catalyst. The clay minerals also serve as a sink for Cr(III). This study reveals the underlying mechanism of the Mn(II)-induced reduction of Cr(VI) by organic ligand in the presence of clay minerals under certain environmental conditions.",
author = "Binoy Sarkar and Ravi Naidu and Krishnamurti, {Gummuluru S. R.} and Mallavarapu Megharaj",
year = "2013",
month = dec,
day = "3",
doi = "10.1021/es401568k",
language = "English",
volume = "47",
pages = "13629--13636",
journal = "Environmental Science and Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "23",

}

RIS

TY - JOUR

T1 - Manganese(II)-Catalyzed and Clay-Minerals-Mediated Reduction of Chromium(VI) by Citrate

AU - Sarkar, Binoy

AU - Naidu, Ravi

AU - Krishnamurti, Gummuluru S. R.

AU - Megharaj, Mallavarapu

PY - 2013/12/3

Y1 - 2013/12/3

N2 - Unlike lower valent iron (Fe), the potential role of lower valent manganese (Mn) in the reduction of hexavalent chromium (Cr(VI)) in soil is poorly documented. In this study, we report that citrate along with Mn(II) and clay minerals (montmorillonite and kaolinite) reduce Cr(VI) both in aqueous phase and in the presence of dissolved organic carbon (SDOC) extracted from a forest soil. The reduction was favorable at acidic pH (up to pH 5) and followed the pseudo-first-order kinetic model. The citrate (10 mM) + Mn(II) (182.02 μM) + clay minerals (3% w/v) system in SDOC accounted for complete reduction of Cr(VI) (192.32 μM) in about 72 h at pH 4.9. In this system, citrate was the reductant, Mn(II) was a catalyst, and the clay minerals acted as an accelerator for both the reductant and catalyst. The clay minerals also serve as a sink for Cr(III). This study reveals the underlying mechanism of the Mn(II)-induced reduction of Cr(VI) by organic ligand in the presence of clay minerals under certain environmental conditions.

AB - Unlike lower valent iron (Fe), the potential role of lower valent manganese (Mn) in the reduction of hexavalent chromium (Cr(VI)) in soil is poorly documented. In this study, we report that citrate along with Mn(II) and clay minerals (montmorillonite and kaolinite) reduce Cr(VI) both in aqueous phase and in the presence of dissolved organic carbon (SDOC) extracted from a forest soil. The reduction was favorable at acidic pH (up to pH 5) and followed the pseudo-first-order kinetic model. The citrate (10 mM) + Mn(II) (182.02 μM) + clay minerals (3% w/v) system in SDOC accounted for complete reduction of Cr(VI) (192.32 μM) in about 72 h at pH 4.9. In this system, citrate was the reductant, Mn(II) was a catalyst, and the clay minerals acted as an accelerator for both the reductant and catalyst. The clay minerals also serve as a sink for Cr(III). This study reveals the underlying mechanism of the Mn(II)-induced reduction of Cr(VI) by organic ligand in the presence of clay minerals under certain environmental conditions.

UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000327999400053&KeyUID=WOS:000327999400053

U2 - 10.1021/es401568k

DO - 10.1021/es401568k

M3 - Journal article

VL - 47

SP - 13629

EP - 13636

JO - Environmental Science and Technology

JF - Environmental Science and Technology

SN - 0013-936X

IS - 23

ER -