Fe3O4/聚(丙烯酸甲酯-二乙烯苯)微球对金属离子的吸附

摘要

通过悬浮聚合制备Fe3O4/聚(丙烯酸甲酯-二乙烯苯)磁性微球,考察了微球对金属离子的吸附性能.结果表明,磁性吸附剂粒径35～55μm,Fe3O4质量分数18%,能有效吸附金属离子.由Langmuir模型得到的饱和吸附容量为别为:Hg2摘要:通过悬浮聚合制备Fe3O4/聚(丙烯酸甲酯-二乙烯苯)磁性微球,考察了微球对金属离子的吸附性能.结果表明,磁性吸附剂粒径35～55μm,Fe3O4质量分数18%,能有效吸附金属离子.由Langmuir模型得到的饱和吸附容量为别为:Hg2+2.3 mmol/g,Cu2+ 2.2 mmol/g,Ni2+ 1.1 mmol/g .由Lagergrent方程计算的吸附速率常数分别为:Hg2+0.023 min-1 , Cu2+ 0.034 min-1 , Ni2+0.036 min-1 .吸附剂可用1mol/L H2SO4再生.+2.3 mmol/g,Cu2+ 2.2 mmol/g,Ni2+ 1.1 mmol/g .由Lagergrent方程计算的吸附速率常数分别为:Hg2+0.023 min-1 , Cu2+ 0.034 min-1 , Ni2+0.036 min-1 .吸附剂可用1mol/L H2SO4再生.%The Fe3O4/(acrylate methyl ester-co-divinylbenzene) magnetic microspheres were prepared by suspension polymerization. The application of these microspheres as an adsorbent for metal ions adsorption was examined. The results showed that the diameter of the magnetic adsorbent was 35～55μm and the amount of Fe3O4 was 18%. The adsorbent showed high efficiency for the removal of metal ions. The maximum adsorption capacity (qm) obtained by the Langmuir isotherm was 2.3 mmol/g for Hg2+ , 2.2 mmol/g for Cu2+ and 1.1 mmol/g for Ni2+ . The adsorption rate constant calculated by Lagergrent equation was 0.023 min-1 for Hg2+ , 0.034 min-1 for Cu2+ and 0.036 min-1 for Ni2+. Regeneration of the adsorbent was achieved using 1mol/L H2SO4.