報告書番号

V09020

タイトル（和文）

天然由来成分を用いた海水ウランの捕集技術の検討

タイトル（英文）

Examination of uranium recovery technique from sea water using natural components for adsorbent

概要 （図表や脚注は「報告書全文」に掲載しております）

海水ウランを捕集するため、天然由来成分を吸着材として検討を行った。天然由来成分の吸着材への作成方法として、化学法、電子線グラフト重合法、伝統的染色法を試した結果、伝統的染色法において、現時点で世界最高レベルのウラン吸着能を誇るアミドキシムに匹敵するウラン吸着能があることがわかった。また、伝統的染色法による吸着材の原材料コストは、アミドキシムに比べて1/3程度に下げられると評価された。

概要 （英文）

In this study, we investigated the potency of natural components as adsorbent for uranium recovery from seawater. In addition, cost evaluation of uranium recovery from seawater using natural components for adsorbents was performed. Furthermore, new ideas on reservation system of adsorbents at sea area were proposed. Several poly-phenols were selected as adsorbent reagents, then they were adsorbed on the support such as cotton fiber by several methods as the followings; chemical syntheses, electrical beam irradiation, and traditional dyeing. As a result, the adsorbent made by traditional dyeing method using gallnut tannin as natural component, was showed high performance for uranium recovery from seawater on only the first. It was evaluated that traditional dyeing method had also advantage in the manufacturing cost, comparing with earlier method. Additionally, it was considered that reservation system of adsorbent at sea was able to be simplified compared with earlier system. Consequently, uranium recovery from sea water using natural components as adsorbent proposed in this study had a potency of practical use.

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