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放射線グラフト重合による有害金属捕集材の開発

Development of toxic metal adsorbent with radiation-induced graft polymerization

玉田 正男

Tamada, Masao

ポリエチレン製の不織布へ放射線グラフト重合を行い繊維状の金属捕集材を合成した。グラフト重合は基材ポリマーの放射線照射により開始される。照射した基材はモノマーと反応させキレートまたはその前駆体を導入した。前駆体は化学処理により、キレート基へと変換した。得られた繊維状の捕集材は鉛溶液か除去において、空間速度が500h$$^{-1}$$という高い空間速度での使用が可能であった。このキレート捕集材はホタテ加工残渣からのカドミウム除去や焼却炉の洗浄水からの鉛の除去に応用が可能である。

Fibrous chelate adsorbents have been synthesized by radiation-induced graft polymerization onto polyethylene nonwoven fabric. Graft polymerization was induced by electron beam irradiation to the trunk polymer. Then, irradiated trunk polymer was contacted with reactive monomer having function of chelate agent or its precursor. The precursor was chemically converted to chelate agent. The resulting fibrous chelate adsorbent gave the high space velocity more than 500 h$$^{-1}$$ in removal of lead from its solution. Such adsorbent was applied to the removal of cadmium from scallop processing waste and the removal of lead from the contaminated water which was produced by washing the inside of incinerator.

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