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Evaluation of graft adsorbent with N-methyl-D-glucamine for boron removal from groundwater

グルカミン型グラフト吸着材を用いた地下水中ホウ素除去試験

保科 宏行; 瀬古 典明; 植木 悠二; 玉田 正男; 弥富 洋介

Hoshina, Hiroyuki; Seko, Noriaki; Ueki, Yuji; Tamada, Masao; Iyatomi, Yosuke

The adsorbent was prepared by radiation induced graft polymerization of glycidyl methacrylate onto nonwoven polyethylene fabric in aqueous medium, and following chemical modification with N-methyl-D-glucamine. The adsorbents were packed into the column, 10 cm in internal diameter. The volume of adsorbent in column was 2,000 cm$$^{3}$$. The column was set into the adsorption equipment which consisted of pump, pre-filters and a fraction collector. The groundwater was pumped up from neutralization tank and was 1.2 ppm of boron concentration. After removed of in/organic compound by pre-filters, the groundwater was pumped into the column at various flow rates. As a result, the bed volume (BV) at breakthrough point were 1,400 and 1,250 at space velocity (SV) 50 and 100 h$$^{-1}$$, respectively. These values correspond to 0.7 and 0.5 mmol/g-adsorbent. However, the BV at breakthrough point significant decreased at SV 200 h$$^{-1}$$. In the case of SV 100 h$$^{-1}$$, the adsorption equipment with the graft adsorbent can treat to remove boron from 4,800 liters of groundwater a day.

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