34 , 35 The stronger affinity for Bi 3+ could be assigned to the Bi speciation in which the presence of hydrolyzed species exhibited a stronger affinity for oxygen donors. This phenomenon also aligns with an increasing trend in the log 10 K values for the first hydrolysis step for Bi 3+ (−1.1) and La 3+ (−8.4). 18 Consequently, it was suggested that SCB-400, SCB-450, and OCB-400 could selectively adsorb Bi 3+ in relatively highly acidic solutions (e.g., 0.3–1 mol L –1 ).
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A Preliminary Study of Spherical Surface-Modified Carbon Materials for Potential Application in La<sup>3+</sup> (Ac<sup>3+</sup>) and Bi<sup>3+</sup> Separation.
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