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放射光イメージングXAFS法による模擬ガラス試料中のロジウム元素の化学状態分析

Chemical state analysis of rhodium in the simulated waste glass by synchrotron radiation based imaging XAFS technique

岡本 芳浩; 永井 崇之; 猪瀬 毅彦*; 佐藤 誠一*; 塩飽 秀啓

Okamoto, Yoshihiro; Nagai, Takayuki; Inose, Takehiko*; Sato, Seiichi*; Shiwaku, Hideaki

簡素化した模擬廃液成分を添加したホウケイ酸ガラス試料について、RuおよびRh元素のイメージングXAFS測定を行い、両元素の分布、化学形を特定し、さらに両元素間の化学的な相関を解析することを試みた。解析の結果、Rhが凝集している領域の化学形はRh金属で、それ以外の領域ではRhO$$_2$$の化学形をとることが分かった。両元素の空間的な分布の相関を調べた結果、Ruが多く分布する領域で、Rhの化学形がRhO$$_2$$を取ることが分かった。

The imaging XAFS measurements of Ru and Rh elements was performed to investigate distribution, chemical state and correlation between the two elements in the simulated borosilicate glass samples. According to the analysis of Rh elements, it was concluded that the chemical form in the aggregated area was metallic, while that in other area was mainly RhO$$_2$$. In addition, it can be seen that the chemical form of Rh tends to be RhO$$_2$$, in the area where a lot of Ru is distributed.

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