Adsorption Properties of Pr³⁺ and Nd³⁺ Using Silica Grafted with Larch Tannin

Abstract:

The new adsorption material was prepared by grafting the larch tannin onto aminated silica beads with the glutaraldehyde as the cross-linking agent. The adsorption properties of Pr³⁺ and Nd³⁺ on the new adsorbent material in aqueous solution were investigated. The results showed that the equilibrium adsorption capacities of this adsorbent to Pr³⁺, Nd³⁺ were 402.12mg/g, 305.43mg/g at 303K when the initial concentrations of each ions were 442.7mg/L, 432.6mg/L, respectively and the pH value was 5.5; the maximum adsorption quantities of each ions were 576.34mg/g, 497.02mg/g at 303K when the initial concentrations of each ions were 704.5mg/L, 721.0mg/L, respectively and the pH value was 5.5. The effect of pH value was significant to the equilibrium adsorption capacity, the optimum pH values of this material to Pr³⁺ and Nd³⁺ were both 5.5; while the effect of the temperature was not obvious to the equilibrium adsorption capacity. The adsorption thermodynamics meet Freundlich equation, and the adsorption kinetics data of this adsorbent to Pr³⁺, Nd³⁺ fitted with the pseudo-second-order rate equation dynamics model.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 1561-1565
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.1561
• Online since: July 2012
• Authors: Tian Tian Xu, Chu Rui Huang, Yuan Yuan Luo, Qiang Du, Shi Lin Zhao
• Keywords: Adsorption, Aminated Silica, Larch Tannin, Nd³⁺, Pr³⁺

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