Dithiooxamide-Immobilized Microalgal Residue for the Selective Recovery of Pd(II) and Pt(IV)

作者：Khunathai Kanjana; Inoue Katsutoshi^*; Ohto Keisuke; Kawakita Hidetaka; Kurata Minoru; Atsumi Kinya; Alam Shafiq

来源：Separation Science and Technology, 2012, 47(8): 1185-1193.

DOI：10.1080/01496395.2011.645384

• adsorption
• functional group immobilization
• oil-rich microalgae
• precious metal recovery

Microalgal residue was chemically modified by immobilizing a functional group of dithiooxamide to prepare a novel type of adsorbent. This adsorbent exhibited high adsorption affinity and selectivity for Pd(II) and Pt(IV) whereas the adsorption of coexisting base metal ions was negligible. From the adsorption isotherms, this adsorbent was found to exhibit remarkably high adsorption capacity. The thermodynamic parameters indicated that the adsorption is governed by an endothermic reaction. The effective separation of Pd(II) and Pt(IV) from Cu(II) was confirmed also by a dynamic adsorption test. The effectiveness of elution of adsorbed Pd(II) and Pt(IV) was 85% and 96%, respectively.

• 出版日期2012