Kinetically excellent nitrate selective anion exchange fibers derived from chloromethylstyrene grafted polyolefin fiber

ポリオレフィン繊維にクロロメチルスチレンをグラフト重合したアニオン交換繊維の高速硝酸イオン除去

城 昭典*; 中當 寛*; 藤本 留理子*; 北垣 将泰*; 松浦 博孝*; 玉田 正男; 瀬古 典明; 植木 悠二

Jo, Akinori*; Nakaatari, Hiroshi*; Fujimoto, Ruriko*; Kitagaki, Masahiro*; Matsuura, Hirotaka*; Tamada, Masao; Seko, Noriaki; Ueki, Yuji

High nitrate concentrations in drinking water bring on infantile methemoglobinemia and are responsible for causing cancers. We prepared three anion exchange fibers named from chloromethylstyrene (CMS) grafted polyethylene-coated polypropylene fiber. Column-mode uptake of nitrate by these anion exchange fibers was tested by changing the feed flow rate and the influence of competing anions was also studied. Since grafted-CMS is highly hydrophobic, the resulting anion exchange fiber becomes highly hydrophobic when triamylamine or trihexylamine was reacted with grafted-CMS. Under such conditions, less hydrated nitrate will be more favoured by the anion exchangers, compared with highly hydrated sulphate.