オキシン処理活性炭による金属イオンの吸着挙動

概要

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Adsorption behavior of some metal ions by an activated carbon treated with 8-hydroxyquinoline (HO_x-AC) was studied for the preconcentration of trace metals. The HO_x-AC was prepared as follows : 20g of predried activated carbon was added into a conical flask containing 500ml of 8-hydroxyquinoline solution (20g/l ethanol solution) and the mixture was stirred for 24h at 20℃. The activated carbon was separated by suction filtration and air-dried. It was washed two times with 500ml portions of 0.2M acetate buffer solution (pH:4), and then washed four times with 500ml portions of distilled water and air-dried again. Finally it was dried at 40℃ for 60 min. The adsorbed amount of 8-hydroxyquinoline was 154mg on 1g of activated carbon. The HO_x-AC can be used in the pH range from 5 to 10 for the adsorber. The adsorption capacity of Cu(II), Zn(II), Gd(II), Ni(II), Mn(II), Ga(II) and Mg(II) was determined. Effect of pH on the recovery of metal ions was also studied. The recovery of 25μg each of Cu(II), Zn(II), Gd(II) and Mn(II) in 500ml of 0.5M sodium chloride solution was more than 95%. The adsorption rate was rapid. The HO_x-AC proved to be useful for the enrichment of trace metals.
社団法人日本分析化学会の論文
1978-05-05