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Adsorption and diffusion of strontium in simulated rock fractures quantified via ion beam analysis

Ohe, T, Zou, B, Morris, PM, Wogelius, RA, Noshita, K, Gomez-Morilla, I and Jeynes, C (2012) Adsorption and diffusion of strontium in simulated rock fractures quantified via ion beam analysis Mineralogical Magazine, 76 (8). pp. 3203-3215.

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Abstract

An experimental technique has been developed and applied to the problem of determining effective diffusion coefficients and partition coefficients of Sr in low permeability geological materials. This technique, the micro-reactor simulated channel method (MRSC), allows rapid determination of contaminant transport parameters with resulting values comparable to those determined by more traditional methods and also creates product surfaces that are amenable for direct chemical analysis. An attempt to further constrain mass flux was completed by detailed ion beam analysis of polished tuff surfaces (tuff is a polycrystalline polyminerallic aggregate dominated by silicate phases) that had been reacted with Sr solutions at concentrations of 10, 10 and 10 mol 1. Ion beam analysis was carried out using beams of both protons (using particle induced X-ray emission and elastic backscattering spectrometry or EBS) and alpha-particles (using Rutherford backscattering spectrometry). The ion beam analyses showed that increased solution concentrations resulted in increased surface concentrations and that in the highest concentration experiment, Sr penetrated to at least 4 mm below the primary interface. The Sr surface concentrations determined by EBS were 0.06 (±0.05), 0.87 (±0.30) and 2.40 (±1.0) atomic weight % in the experiments with starting solution concentrations of 10 , 10, and 10 mol 1, respectively. © 2012 The Mineralogical Society.

Item Type: Article
Authors :
NameEmailORCID
Ohe, TUNSPECIFIEDUNSPECIFIED
Zou, BUNSPECIFIEDUNSPECIFIED
Morris, PMUNSPECIFIEDUNSPECIFIED
Wogelius, RAUNSPECIFIEDUNSPECIFIED
Noshita, KUNSPECIFIEDUNSPECIFIED
Gomez-Morilla, IUNSPECIFIEDUNSPECIFIED
Jeynes, CUNSPECIFIEDUNSPECIFIED
Date : December 2012
Identification Number : 10.1180/minmag.2012.076.8.33
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:14
Last Modified : 31 Oct 2017 17:06
URI: http://epubs.surrey.ac.uk/id/eprint/806486

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