Bayramoğlu Gülay, Arica M Yakup
Biochemical Processing and Biomaterial Research Laboratory, Faculty of Science, Kirikkale University, 71450 Yahşihan, Kirikkale, Turkey.
J Hazard Mater. 2007 Jun 1;144(1-2):449-57. doi: 10.1016/j.jhazmat.2006.10.058. Epub 2006 Oct 26.
Poly(glycidylmethacrylate-methylmethacrylate), p(GMA-MMA-EGDMA), magnetic beads were prepared via suspension polymerization in the presence of ferric ions. The epoxy groups of the beads were converted into amino groups via ring opening reaction of the ammonia and, the aminated magnetic beads were used for the removal of Hg(II) ions from aqueous solution in a batch experiment and in a magnetically stabilized fluidized bed reactor (MFB). The magnetic p(GMA-MMA-EGDMA) beads were characterized with scanning electron microscope (SEM), FT-IR and ESR spectrophotometers. The optimum removal of Hg(II) ions was observed at pH 5.5. The maximum adsorption capacity of Hg(II) ions by using the magnetic beads was 124.8+/-2.1 mgg(-1) beads. In the continuous MFB reactor, Hg(II) ions adsorption capacity of the magnetic beads decreased with an increase in the flow-rate. The maximum adsorption capacity of the magnetic beads in the MFB reactor was 139.4+/-1.4 mgg(-1). The results indicate that the magnetic beads are promising for use in MFB for removal of Hg(II) ions from aqueous solution and/or waste water treatment.
聚（甲基丙烯酸缩水甘油酯-甲基丙烯酸甲酯），即p（GMA-MMA-EGDMA），磁性微珠是在铁离子存在下通过悬浮聚合制备的。微珠的环氧基团通过氨的开环反应转化为氨基，并且将胺化的磁性微珠用于在分批实验和磁稳定流化床反应器（MFB）中从水溶液中去除Hg（II）离子。用扫描电子显微镜（SEM）、傅里叶变换红外光谱仪（FT-IR）和电子自旋共振光谱仪（ESR）对磁性p（GMA-MMA-EGDMA）微珠进行了表征。在pH 5.5时观察到Hg（II）离子的最佳去除效果。使用磁性微珠对Hg（II）离子的最大吸附容量为124.8±2.1 mg g⁻¹微珠。在连续MFB反应器中，磁性微珠对Hg（II）离子的吸附容量随流速增加而降低。MFB反应器中磁性微珠的最大吸附容量为139.4±1.4 mg g⁻¹。结果表明，磁性微珠有望用于MFB中从水溶液和/或废水处理中去除Hg（II）离子。
