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Abstract

The adsorption and chromatographic properties of microparticulated diamond (1–2 μm and 4–6 μm fractions) from high pressure and high temperature synthesis (HPHT diamond) are investigated, with a focus on their cation-exchange capacity. Several adsorbents were prepared, either by wet oxidation of the surface of HPHT with H2O2/H2SO4or HNO3/H2SO4 mixtures, or by oxidation in air at 700 °C, or following a four-step reduction using LiAlH4 and n-butyllithium. The zeta-potential profiles as a function of pH and ion-exchange capacities were measured for the prepared adsorbents as well as isotherms of adsorption. The ion-exchange selectivity of oxidised HPHT diamond was studied towards alkali, alkaline-earth and transition metal cations.

Item Type:	Article
Authors/Creators:	Peristyy, A and Koreshkova, AN and Paull, B and Nesterenko, PN
Keywords:	synthetic diamond, adsorption, metal cations, ion-exchange, liquid chromatography
Journal or Publication Title:	Diamond and Related Materials
Publisher:	Elsevier Science Sa
ISSN:	0925-9635
DOI / ID Number:	https://doi.org/10.1016/j.diamond.2017.02.022
Copyright Information:	Copyright 2017 Elsevier B.V.
Related URLs:	UTAS Profile: Peristyy, A Google Scholar: Paull, B UTAS Profile: Paull, B Google Scholar: Nesterenko, PN UTAS Profile: Nesterenko, PN
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