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※ 半角英数字
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Development of paper sludge ash-based geopolymer and application to treatment of hazardous water contaminated with radioisotopes

紙スラッジ焼却灰を用いたジオポリマーの開発と放射性核種で汚染した廃液処理への利用

Li, Z.*; 大貫 敏彦; 池田 攻*

Li, Z.*; Onuki, Toshihiko; Ikeda, Ko*

ペーパースラッジを原料としたジオポリマー固化体を室温で調製し、短時間の浸出実験によりSrとCsの閉じ込め性能を評価した。作製したジオポリマー固化体は半結晶性で多孔質であった。浸出実験では、硝酸ストロンチウムまたは硝酸セシウムを固化体重量の1%となるように加えて調製した固化体を4mm以下に粉砕しpH4.01の緩衝液中に6時間入れた。固化体から約0.2%のSr、約1.3%のCsが浸出した。

Geopolymer samples were prepared at room temperature using paper sludge ashes and immobilization of Sr and Cs in these samples were evaluated by short-term leaching test. The prepared geopolymer samples were semi-crystalline and porous. For the leaching test, the geopolymer samples containing 1 weight % of strontium nitrate or cesium nitrate were prepared, crushed to be finer than 4 mm in size, and immersed in a phthalic salt buffer (pH4) for 6 h. About 0.2% of Sr and 1.3% of Cs were leached from the geopolymer samples.

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パーセンタイル:29.21

分野:Materials Science, Multidisciplinary

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