Characterization of arsenic speciation using XANES spectroscopy in Comamonas terrae, an arsenite-oxidizing bacterium isolated from agricultural soil in Thailand

Author:

Kitja Chitpirom 1, Ancharida Akaracharanya 2, Somboon Tanawupawat 3, Natchanun Leeptpatpiboon 4, Kyoung-Woong Kim 5, Josef Hormes 6 and Alexander Prange 6, 7, 8*

Received 9 September  2016, accepted 28 December 2016.

Abstract

Comamonas terrae, a Gram-negative, rod-shaped bacterium isolated from agricultural soil in Thailand, is able to oxidize arsenite to arsenate in soil and water systems. X-ray absorption near-edge structure (XANES) spectroscopy was used to quantify arsenic speciation in culture supernatants from Comamonas terrae grown in arsenite-containing media to demonstrate its arsenite oxidation capability. This strain offers new opportunities in soil bioremediation processes based on its capability to transform As(III) into the less-toxic As(V).

Journal: Food, Agriculture and Environment (JFAE)
Online ISSN: 1459-0263

Year: 2017, Vol. 15, Issue 1, pages 44-47.

Publisher: WFL.


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