Characterisation and analysis of persistent organic pollutants and major, minor and trace elements in Calabash chalk

Dean, John, Deary, Michael, Gbefa, B. K. and Scott, Wanda C. (2004) Characterisation and analysis of persistent organic pollutants and major, minor and trace elements in Calabash chalk. Chemosphere, 57 (1). pp. 21-25. ISSN 0045-6535

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Abstract

Analysis of Calabash chalk has been done using energy dispersive X-ray fluorescence spectroscopy (EDXRF), X-ray diffraction (XRD) and pressurised fluid extraction (PFE) followed by gas chromatography (GC) with mass selective detection (MSD). It was found by XRD that the composition of Calabash chalk was an aluminium silicate hydroxide from the kaolin clay group with the possible formula Al2Si2O5(OH)4. Multi-elemental analysis by EDXRF was able to quantify 22 elements in Calabash chalk including lead at a mean concentration of approximately 40 mg/kg. A range of persistent organic pollutants were identified and quantified in Calabash chalk including alpha lindane, endrin, endosulphan II and p,p′-DDD using PFE-GC-MSD.

Item Type:	Article
Uncontrolled Keywords:	Calabash chalk, metals, persistent organic pollutants, Geophagia, energy dispersive X-ray fluorescence spectroscopy (EDXRF), gas chromatography with mass selective detection (GC-MSD)
Subjects:	F100 Chemistry
Department:	Faculties > Health and Life Sciences > Applied Sciences
Depositing User:	Becky Skoyles
Date Deposited:	12 Aug 2014 15:22
Last Modified:	12 Oct 2019 17:30
URI:	http://nrl.northumbria.ac.uk/id/eprint/17395

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