Denizli A, Salih B, Kavakli C, Pişkin E
Department of Chemistry and Biochemistry Division, Hacettepe University, Ankara, Turkey.
J Chromatogr B Biomed Sci Appl. 1997 Sep 26;698(1-2):89-96. doi: 10.1016/s0378-4347(97)00306-x.
Aluminum [Al(III)] adsorption onto dye-incorporated poly(ethylene glycol dimethacrylate-hydroxyethyl methacrylate) [poly(EGDMA-HEMA)] microspheres was investigated. Poly(EGDMA-HEMA) microspheres, in the size range of 150-200 microm, were produced by a modified suspension polymerization of EGDMA and HEMA. The reactive dyes (i.e., Congo Red, Cibacron Blue F3GA and Alkali Blue 6B) were covalently incorporated to the microspheres. The maximum dye load was 14.5 micromol Congo Red/g, 16.5 micromol Cibacron Blue F3GA/g and 23.7 micromol Alkali Blue 6B/g polymer. The maximum Al(III) adsorption on the dye microspheres from aqueous solutions containing different amounts of Al(III) ions were 27.9 mg/g, 17.3 mg/g and 12.2 mg/g polymer for the Congo Red, Cibacron Blue F3GA and Alkali Blue 6B, respectively. The maximum Al(III) adsorption was observed at pH 7.0 in all cases. Non-specific Al(III) adsorption was about 0.84 mg/g polymer under the same conditions. High desorption ratios (95%) were achieved in all cases by using 0.1 M HNO3. It was possible to reuse these dye-incorporated poly(EGDMA-HEMA) microspheres without significant losses in the Al(III) adsorption capacities.
研究了铝离子[Al(III)]在负载染料的聚（乙二醇二甲基丙烯酸酯-甲基丙烯酸羟乙酯）[聚（EGDMA-HEMA）]微球上的吸附情况。通过对EGDMA和HEMA进行改进的悬浮聚合制备了尺寸范围为150 - 200微米的聚（EGDMA-HEMA）微球。将活性染料（即刚果红、汽巴克隆蓝F3GA和碱性蓝6B）共价结合到微球上。最大染料负载量分别为14.5微摩尔刚果红/克、16.5微摩尔汽巴克隆蓝F3GA/克和23.7微摩尔碱性蓝6B/克聚合物。对于刚果红、汽巴克隆蓝F3GA和碱性蓝6B，从含有不同量Al(III)离子的水溶液中，染料微球对Al(III)的最大吸附量分别为27.9毫克/克、17.3毫克/克和12.2毫克/克聚合物。在所有情况下，最大Al(III)吸附均在pH 7.0时观察到。在相同条件下，非特异性Al(III)吸附约为0.84毫克/克聚合物。通过使用0.1 M HNO₃，在所有情况下都实现了高解吸率（95%）。可以重复使用这些负载染料的聚（EGDMA-HEMA）微球，而不会在Al(III)吸附能力上有显著损失。
