Adsorbent for arsenic(V) removal synthesized by radiation-induced graft polymerization onto nonwoven cotton fabric

放射線グラフト重合により作製したセルロース製吸着材のヒ素吸着特性評価

保科 宏行; 高橋 牧克*; 笠井 昇; 瀬古 典明

Hoshina, Hiroyuki; Takahashi, Makikatsu*; Kasai, Noboru; Seko, Noriaki

A fibrous adsorbent for arsenic (As) removal was synthesized with nonwoven cotton fabric as a trunk polymer. Phosphoric acid monomer was reacted by radiation-induced graft polymerization onto nonwoven cotton fabric. The degree of grafting of 130% was obtained at irradiation dose of 20 kGy with 5% of monomer solution for 2 hours reaction time at 40C reaction temperature. After the grafted material was contacted with 10 mmol/L of zirconium (Zr) solution at pH1, 0.38 mmol/g of Zr as a functional group was loaded on the grafted phosphoric units for As(V) removal. The resulting adsorbent was evaluated by column mode adsorption with 1 mg/L of As(V) solution at various pH with space velocity 200 h. The maximum capacity of As(V) adsorption was 0.1 mmol/g at pH2.