生分解性基材を用いた金属除去吸着材の作製

Mercury adsorbent synthesized by graft polymerization onto cellulose nonwoven materials

関根 綾子*; 鈴木 義男*; 瀬古 典明; 玉田 正男

Sekine, Ayako*; Suzuki, Yoshio*; Seko, Noriaki; Tamada, Masao

生分解性基材を母材とする金属除去吸着材は、セルロース不織布にグリシジルメタクリレートを放射線グラフト重合し、その後エチレンジアミン、あるいは、ジエチレントリアミンを導入することにより作製した。作製した吸着材の水銀に対する吸着特性を評価したところ、pH3付近において最も吸着性能が高く、分配係数はEDA型では1.910、DETA型では 2.310 となった。

Glycidyl methacrylate was grafted on cellulose nonwoven materials in its emulsion state. Amine-type adsorbents for mercury removal were synthesized by reacting the obtained GMA-grafted cellulose with ethylenediamine (EDA) and diethylenetriamine (DETA). The amounts of the amine contents were 2.9 mol/kg-adsorbent for EDA type and 2.8 mol/kg-adsorbent for DETA type respectively. The adsorbents were put in the mercury solution of 100 ppb to evaluate the adsorption selectivity. The adsorption performance was highest at pH3 and the distribution coefficient in pH3 became 1.910 for EDA type and 2.310 for DETA type, respectively.