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In situ XRF analysis of Cs adsorption by the precipitation bands of Prussian blue analogues formed in agarose gels

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Abstract

The measurement of Cs adsorption by the precipitation bands of Mn-based Prussian blue analogues (PBAs), Co-based PBAs, and Prussian blue (PB), which were spontaneously formed in agarose gel, was carried out using in situ X-ray fluorescence (XRF) spectroscopy. Three gel samples, namely “Mn-PBA,” “Co-PBA,” and “PB,” were prepared by bringing 0.05 M [Fe(CN)6]3− agarose gel (2.3 mass%) into contact with 0.50 M solutions of MnSO4, CoCl2, and FeCl2, respectively. Mn-PBA formed relatively wide, discrete precipitation bands, whereas Co-PBA and PB each formed a continuous band. The XRF intensity distribution measurements determined using an energy-dispersive XRF setup showed that the PBA/PB concentration fluctuates considerably in Mn-PBA but not in Co-PBA or PB. Time-dependent Cs L-emission distributions for these samples, into which a 0.10 M CsCl solution was introduced, indicated that in agarose gel, the precipitates of Mn-based PBAs can trap Cs+ more effectively than those of PB and Co-based PBAs if the Cs processing time is relatively long (i.e., ≥10 d). These results demonstrate the potential applicability of Mn-based PBA precipitates that are self-organized in agarose gel as pulsatile 137Cs adsorbent delivery materials.

Graphical abstract: In situ XRF analysis of Cs adsorption by the precipitation bands of Prussian blue analogues formed in agarose gels

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Publication details

The article was received on 23 Jan 2019, accepted on 08 Mar 2019 and first published on 08 Mar 2019


Article type: Paper
DOI: 10.1039/C9JA00025A
Citation: J. Anal. At. Spectrom., 2019, Advance Article

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    In situ XRF analysis of Cs adsorption by the precipitation bands of Prussian blue analogues formed in agarose gels

    H. Hayashi, Y. Sato, S. Aoki and M. Takaishi, J. Anal. At. Spectrom., 2019, Advance Article , DOI: 10.1039/C9JA00025A

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