乙二胺改性聚合物磁性微球吸附CO2＋

采用微悬浮聚合法制各聚合物磁性微球，并用乙二胺对其进行改性，研究了其对水溶液中的Co^2＋的吸附和脱附行为。结果表明，磁性微球的粒径在1到6um之间，并具有良好的单分散性。微球在pH=36之间对Co^2＋有较好的吸附效果，其最大吸附蒸达到50．0ng·g^-1。在0．1M H2SO4水溶液中、98％以上吸附在微球上的钻离子可以被有效地脱附下来。Langmuir方程很好地拟合了磁性微球吸附钴离子的吸附等温线，磁性微球吸附钴离子时发生较多的是单分子层的化学吸附。

Adsorption of Co2＋ by polymer magnetic beads modified with ethylenediamine

The polymer magnetic beads were synthesized by microsuspension polymerization, and vere sufficiently modified with ethylene diamine. The magnetic beads were characterized by scanning electron microscopy, and the adsorption, desorption and regeneration of Co^2＋ onto these beads were investigated carefully. The results show that diameter of these magnetic beads falls between 1 and 6u m, and have high degree of monodispersity. The adsorption process could be carried out at pH = 3 - 6, the saturation adsorbance reached 50.0 mg g^-1. 98% Co^2＋ on the magnetlc beads could be desorbed in 0. 1MH2SO4 aqueous solution. Langmuir equation well fitted the adsorption data of Co2＋, hence, the adsorption of Co2＋ to magnetic beads is monolayer chemical adsorption.