Evaluation of lanthanide sorption and their coordination mechanism by EXAFS measurement using novel hybrid adsorbent

EXAFS法による新規ハイブリット吸着剤のランタノイド吸着特性の評価とその配位メカニズム

Awual, M. R.; 小林 徹 ; 塩飽 秀啓   ; 宮崎 有史; 元川 竜平   ; 鈴木 伸一; 岡本 芳浩  ; 矢板 毅

Awual, M. R.; Kobayashi, Toru; Shiwaku, Hideaki; Miyazaki, Yuji; Motokawa, Ryuhei; Suzuki, Shinichi; Okamoto, Yoshihiro; Yaita, Tsuyoshi

This study was investigated the trace lanthanide (Nd(III), Eu(III) and Yb(III)) sorption and recovery from wastewater streams by novel hybrid adsorbent. The experiments were investigated to determine the effects pH, ions selectivity and lanthanide ions coordination by XAFS spectra. The EXAFS data revealed that O and N donor atoms of the HA were strongly coordinated to lanthanide ions to form stable complexes. However, the bond distance of O donor atoms was shorter than N donor atoms.