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

Fathul Karim Sahrani, Madzlan Abd Aziz, Zaharah Ibrahim, Adibah Yahya

Research output: Contribution to journalArticle

4 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)131-135
Number of pages5
JournalSains Malaysiana
Volume37
Issue number2
Publication statusPublished - Jun 2008

Fingerprint

Steel
Surface analysis
Sulfates
Bacteria
Iron
X ray photoelectron spectroscopy
Sulfides
Shipyards
Ports and harbors
Surface chemistry
Disulfides
Oxides
Precipitates
Oxygen

Keywords

  • Biocorrosion
  • Exopolymeric substances
  • Sulphate-reducing bacteria
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • General

Cite this

Surface analysis of marine sulphate-reducing bacteria exopolymers on steel during biocorrosion using X-ray photoelectron spectroscopy. / Sahrani, Fathul Karim; Aziz, Madzlan Abd; Ibrahim, Zaharah; Yahya, Adibah.

In: Sains Malaysiana, Vol. 37, No. 2, 06.2008, p. 131-135.

Research output: Contribution to journalArticle

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AU - Yahya, Adibah

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AB - 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.

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