Single- and multi-stage Cs⁺, Sr²⁺, Co²⁺ ions adsorption by Zr–Ca–Mg phosphate sorbent from single- and multi-component aqueous solutions

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2025年11月24日

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Natalja Kitikova,
Irina Shashkova,
Andrei Ivanets,
Anastasiya Dzikaya

摘要

The single- and multi-stage Cs⁺, Sr²⁺and Co²⁺ ions adsorption by a sorbent based on Zr–Ca–Mg phosphates from single-component and multi-component solutions depends on background electrolytes and the V/m ratios were studied. The maximum removal efficiency of 69–95% with a single-stage solution purification was achieved at V/m 125–250 ml/g. Multi-stage purification of solutions in 4 stages reached to increase the removal efficiency up to 100% and significantly reduced adsorbent consumption. The residual metal concentrations after 4 cycles multi-component solution purification were 0.004–0.166 versus 0.71–1.18 mg l⁻¹ after a single purification with twice sorbent dosage. There was a predominant Co²⁺ ions removal during a multi-component solution purification, in the first cycle and Cs⁺ at further stages. Co²⁺ and Sr²⁺ ions adsorption remained at a high level in the presence of H₃BO₃ and Na⁺ ions, while the Cs⁺ ions removal was least affected in presence of H₃BO₃ and Ca²⁺ ions.

Single- and multi-stage Cs+, Sr2+, Co2+ ions adsorption by Zr–Ca–Mg phosphate sorbent from single- and multi-component aqueous solutions

摘要

Single- and multi-stage Cs⁺, Sr²⁺, Co²⁺ ions adsorption by Zr–Ca–Mg phosphate sorbent from single- and multi-component aqueous solutions