Adsorption of monovalent ions on zinc ferrocyanide
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Analysis of thermal decomposition of acidified sediments in gold plants and harmless disposal of it
2022, Journal of Hazardous MaterialsCitation Excerpt :Silver nitrate (AgNO3, ≥ 99.7%), potassium iodide (KI, ≥ 99%) hydrochloric acid (HCl, 36–38%) and nitric acid (HNO3, 65%) as digestion solution were supplied by Tianjin chemical reagent company (Tianjin, China). While Zn2Fe(CN)6 was synthesized according to the literature reported, and its XRD pattern is shown in Fig. 1(b) (Ganzerli Valentini et al., 1972); meanwhile, ultrapure water with electrical resistivity of 18.2 MΩ·cm (Millipore Milli-Q water system) was used throughout the experiments. All chemicals used in this work were of analytical grade except Zn2Fe(CN)6, unless otherwise specified.
Mechanochemical activation of antigorite to provide active magnesium for precipitating cesium from the existences of potassium and sodium
2019, Applied Clay ScienceCitation Excerpt :Compared to other materials, HCFs have such high selectivity and capacity that they have been commonly studied as precipitants for alkali metal cations, especially cesium, from aqueous radioactive wastes (Chen et al., 2013; Lento and Harjula, 1987). Transition metal hexacyanoferrates can be easily prepared by mixing a solution of alkali metal hexacyanoferrate(II) with soluble transition metal salts (Paul, 1993; Valentini et al., 1972). However, these hexacyanoferrates are usually unstable when heated or with acid solution and tend to produce dangerous chemicals besides the radioactive cesium.
Radioactive cesium removal from ash-washing solution with high pH and high K<sup>+</sup>-concentration using potassium zinc hexacyanoferrate
2016, Chemical Engineering Research and DesignCitation Excerpt :Therefore, the particle size should be chosen appropriately as per the purpose. In this paper, we discussed the R-Cs adsorption properties of potassium zinc hexacyanoferrate (KZnHCF) (Vlasselaer et al., 1976; Loos-Neskovic and Fedoroff, 1988; Ganzerli Valentini et al., 1972; Nilchi et al., 2003; Shakir et al., 2007), a type of ZnHCF. Different from other commonly used analogs, CuHCF and PB, the primary particle sizes of which is less than 30 nm (Gotoh et al., 2007; Takahashi et al., 2015), particle size of ZnHCF is more than 200 nm (Lee et al., 2013).
Comparative study of the factors associated with the application of metal hexacyanoferrates for environmental Cs decontamination
2016, Chemical Engineering JournalCitation Excerpt :The major problem with the separation of Cs is the coexistence of abundant alkali metal ions possessing closely resembling aqueous chemistry. For this reason, besides bentonite kind of materials, MHCF analogues are widely studied for the preferential separation of Cs [9–12]. Even though the core property of Cs selectivity is maintained, each PB-analogue offers some distinct feature.
Electrically-driven facilitated transport of Cs<sup>+</sup> across copper ferrocyanide channels in track etched membrane
2013, Journal of Membrane ScienceCitation Excerpt :Most of the transition metal (Fe, Ni, Cu, Zn) ferrocyanides are known for their excellent adsorption properties for heavy alkali metal ions, especially for Cs+ [14–18]. The cesium adsorption property increases with the ferrocyanides series: Fe<Cu<Zn<Ni<Co [19–21]. The metal ferrocyanides can also act as ion-exchangers [22–26], photosensitizer [27] as well as photocatalysts [28].
Removal of cesium from aqueous solutions and radioactive waste simulants by coprecipitate flotation
2007, Separation and Purification Technology