The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
XAS Speciation of Arsenic in a Hyper-Accumulating Fern
Abstract
The coordination environment and the redox speciation of arsenic in a newly discovered arsenic hyper-accumulating fern (Pteris vittata L) were investigated by X-ray absorption spectroscopy. This method allowed us to probe arsenic directly, i.e., with minimal sample preparation. The results indicate that arsenic is predominantly accumulated as As(III) in the leaves. XANES and EXAFS results show that As(III) in the leaves is primarily present as aqueous arsenite species. The plant actively maintains arsenic in this reduced oxidation state, because after sample collection and subsequent aging and drying of the plant material, As(III) is gradually oxidized to As(V). We think that these arsenite species are sequestered in vacuoles. At extremely high As concentrations (ca. 1% As per dry weight) arsenic in the fern leaves is coordinated to a significant degree by sulfur in addition to oxygen. This spectral signature indicates that thiol-rich compounds are implicated in the biochemical transformations of arsenic within the plant.
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Cites
(1999) · Choice Reviews Online · doi:10.5860/choice.37-0940 · Cited by 14,314
Arsenate and Chromate Retention Mechanisms on Goethite. 1. Surface Structure
Fendorf, S., Eick, M. J., Grossl, P., & Sparks, D. L. (1997) · Environmental Science & Technology · doi:10.1021/es950653t · Cited by 1,017
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Mohan, D., & Pittman, C. U. (2007) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2007.01.006 · Cited by 3,536
Arsenic uptake and metabolism in plants
Zhao, F. J., Ma, J. F., Meharg, A. A., & McGrath, S. P. (2009) · New Phytologist · doi:10.1111/j.1469-8137.2008.02716.x · Cited by 1,185
A review on detection of heavy metal ions in water—An electrochemical approach
Gumpu, M. B., Sethuraman, S., Krishnan, U. M., & Rayappan, J. B. B. (2015) · Sensors and Actuators B: Chemical · doi:10.1016/j.snb.2015.02.122 · Cited by 1,027
Determination of arsenic species: A critical review of methods and applications, 2000–2003
Francesconi, K. A., & Kuehnelt, D. (2004) · The Analyst · doi:10.1039/b401321m · Cited by 469
Rapid reduction of arsenate in the medium mediated by plant roots
Xu, X. Y., McGrath, S. P., & Zhao, F. J. (2007) · New Phytologist · doi:10.1111/j.1469-8137.2007.02195.x · Cited by 355
Metadata
- Authors
- Webb, S. M., Gaillard, J.-F., Ma, L. Q., & Tu, C.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-01-18
- Volume
- 37
- Issue
- 4
- Pages
- 754-760
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W1488670835
- Cited by
- 174
- References
- 2
- FWCI
- 11.00
- Type
- journal article
- Language
- en
- Open access
- closed
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