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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
no journal, ,
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.