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Surface analysis of marine sulphate-reducing bacteria exopolymers on steel during biocorrosion using x-ray photoelectron spectroscopy

Sahrani, Fathul Karim and Abd. Aziz, Madzlan and Ibrahim, Zaharah and Yahya, Adibah (2008) Surface analysis of marine sulphate-reducing bacteria exopolymers on steel during biocorrosion using x-ray photoelectron spectroscopy. Sains Malaysiana, 37 (2). 131 -135. ISSN 0126-6039

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Abstract

The aim of this study was to determine the surface chemistry during biocorrosion process on growth and on the production of exopolymeric substances (EPS) in batch cultures of mix-strains of marine sulphate-reducing bacteria (SRB) isolated from Malaysian Shipyard and Engineering Harbour, Pasir Gudang. Ae EPS and precipitates were analyzed by X-ray photoelectron spectroscopy (XPS). The XPS results indicate that Fe(2p3/2) spectrum for iron sulphide can be fitted with Fe(II) and Fe(III) components, both corresponding to Fe-S bond types. Ae absence of oxide oxygen in the O(1s) spectrum and Fe(III)-O bond types in the Fe(2p3/2) spectrum supports the conclusion that iron sulphides are composed of both ferric and ferrous iron coordinated with monosulphide and disulphide.

Item Type:Article
Uncontrolled Keywords:biocorrosion, exopolymeric substances, sulphate-reducing bacteria, x-ray photoelectron spectroscopy
Subjects:Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
Divisions:Science
ID Code:12873
Deposited By: Liza Porijo
Deposited On:05 Jul 2011 01:11
Last Modified:05 Jul 2011 01:11

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