Behavior of Iminodiacetate Fiber in Column-mode Adsorption of Lead (II)
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Chloromethylstyrene-grafted polyethylene-coated polypropylene fiber (0.9 denier, length 3.7cm) was functionalized by reaction with diethyl iminodiacetate and subsequent hydrolysis of the ester introduced. An acid capacity of the resulting chelating fiber (FIDA-f) was 4.3 meq/g. Although a maximum permissible flow rate of feeds was depressed with an increase in the conditioning pH of the FIDA-f column, breakthrough profiles of Pb (II) were independent of the flow rate of feeds up to 800h<SUP>-1</SUP> in space velocity (<I>SV</I>) . The usefulness of FIDA-f was demonstrated by quantitative removal of Pb (II) from 600 bed volumes of a Pb (II) -spiked river water (5ppm) at a flow rate of <I>SV</I> 400h<SUP>-1</SUP>.
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