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Some studies on the adsorption behaviour of an oxidised starch onto haematite

Subramanian, S and Natarajan, KA (1988) Some studies on the adsorption behaviour of an oxidised starch onto haematite. In: Minerals Engineering, 3 (1). pp. 241-254.

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Abstract

The interaction of an oxidised starch with natural haematite has been investigated through adsorption studies, X-ray photoelectron and FTIR spectroscopic techniques. The adsorption density is found to vary with pH, with the maximum adsorption taking place in the pH range 4 to 10. Adsorption isotherms at 30 and 50°C show that the adsorption density varies also with temperature. The infrared and X-ray photoelectron spectra of adsorbed starch on haematite indicate evidence of chemical interaction and hydrogen bonding. Further, the direct interaction of ferric ion with starch has been studied through binding in solution, SEM-EDAX analysis, viscosity and conductivity measurements, and these results suggest chemical interaction between iron and starch. Based on the above findings, probable adsorption mechanisms in this system have been postulated.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to the Elsevier Science.
Keywords: Adsorption studies; oxidised starch; haematite; X-ray photoelectron spectra; FTIR spectra; viscosity; conductivity; chemical interaction; hydrogen bonding.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 19 Feb 2008
Last Modified: 19 Sep 2010 04:42
URI: http://eprints.iisc.ernet.in/id/eprint/13052

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