Development of removal method for ferric and manganese ions with fibrous graft-adsorbent

Takahashi, Manabu*; Tanaka, Kazuya*; Tamada, Masao; Aoi, Toru*

Fibrous metal adsorbent having iminodiacetic acid was synthesized by radiation-induced grafting glycidyl methacrylate on nonwoven fabric and subsequent chemical treatment. The degree of grafting calculated by increasing weight after grafting reached 170 % for reaction time of 2h at 40 C. The adsorption characteristics of ferric and manganese ions were evaluated by using the resulting adsorbent with 2.1 mmol/g-adsorbent function group of iminodiacetic acid. Each distribution coefficient of ferric and manganese ion deceased with increase of another coexist ion. Both ferric and manganese ions were completely removed by the adsorbent column at the space velocity of 1000h. Adsorption capacities of both ions were reduced to 80% after 5 times reputation of adsorption and desorption.