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Vibrational spectroscopy of the multi anion mineral zykaite Fe4(AsO4)(SO4)(OH)•15H2O – implications for arsenate removal

Frost, Ray L., Palmer, Sara J., & Xi, Yunfei (2011) Vibrational spectroscopy of the multi anion mineral zykaite Fe4(AsO4)(SO4)(OH)•15H2O – implications for arsenate removal. Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 83(1), pp. 444-448.

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Abstract

Some minerals are colloidal and are poorly diffracting . Vibrational spectroscopy offers one of the few methods for the assessment of the structure of these types of minerals. Among this group of minerals is zykaite with formula Fe4(AsO4)(SO4)(OH)•15H2O. The objective of this research is to determine the molecular structure of the mineral zykaite using vibrational spectroscopy. Raman and infrared bands are attributed to the AsO43-, SO42- and water stretching vibrations. The sharp band at 3515 cm-1 is assigned to the stretching vibration of the OH units. This mineral offers a mechanism for the formation of more crystalline minerals such as scorodite and bukovskyite. Arsenate ions can be removed from aqueous systems through the addition of ferric compounds such as ferric chloride. This results in the formation of minerals such as zykaite and pitticite (Fe3+,AsO4,SO4,H2O).

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4 citations in Scopus
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3 citations in Web of Science®

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ID Code: 46409
Item Type: Journal Article
Keywords: Raman spectroscopy, zykaite, kankite, pitticite, arsenate, sulphate, arsenopyrite
DOI: 10.1016/j.saa.2011.08.062
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2011 Elsevier
Copyright Statement: this is the author’s version of a work that was accepted for publication in Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, [VOL 83, ISSue 1,(2011)] DOI: 10.1016/j.saa.2011.08.062
Deposited On: 13 Oct 2011 11:00
Last Modified: 10 May 2014 16:56

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