Abstract
New adsorbents (AP, AMP, AHMP and MG) were prepared by introducing the aminoalcohol groups such as 3-amino-1, 2-propanediol, 2-amino-2-methyl-1, 3-propanediol, 2-amino-2-hydroxymethyl-1, 3-propandiol and N-methyl-D (-) -glucamine, respectively, to glycidyl methacrylate-divinylbenzene microspheres (GD) in order to investigate the adsorption properties of boron. All experiments were carried out using a batch method. The amount of OH group introduced to microspheres is the following order: MG>AMP>AHMP>AP. The adsorption of boron showed maximums at pH 6-8 for all adsorbents. The adsorption capacity and the adsorption equilibrium constant were determined using the Langmuir equation. Their adsorption capacities for boron are the following order: AHMP>MG>AP>AMP. Although the amount of OH group introduced to AP is less than AMP, the adsorption capacity of AP is higher than AMP. This result suggests that boron prefers the five-membered chelating ring to the six-membered chelating ring. Boron adsorbed on AMP was easily desorbed using 1 mol·dm-3 hydrochloric acid.
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