有效多孔的球形的 polyethyleneimine 纤维素(PEI 房间) 吸收剂被综合并且描绘。为二个典型金属离子, Cr 3 + 和 Fe 3 +, 的主要影响因素和吸附机制被调查。吸附表演首先取决于金属离子, pH 价值和温度的起始的集中,并且在 PEI 房间和金属离子的 N 原子之间的 chelation 行动起一个重要作用。在动态吸附条件下面, polyethyleneimine 纤维素的浸透吸附是 83.98 ;为 Cr (III ) 和 377.19 的 mg·g − 1 ;为 Fe (III ) 的 mg·g − 1 ,比报导数据和未修改的纤维素的高。吸附能很好与运动方程和 Freundlich 吸附建模的秒顺序被描述,并且吸附的 H, G 和 S 都是否定的。与是的 5% HCl, eluent, Cr (III ) 的 elution 比率和 Fe (III ) 在 313 完成了 99.88% 和 97.74% ; K 分别地。在多孔的 PEI 房间被再使用 6 次以后,它仍然介绍了令人满意的吸附性能。上面的结果显示出象容易获得的原料,高效率,稳定的再循环表演和 biodegradability 那样的优点。
An efficient porous spherical polyethyleneimine-cellulose (PEI-cell) absorbent was synthesized and char- acterized. The main influencing factors and adsorption mechanism for two typical metal ions, Cr3+ and Fe3+, were investigated. The adsorption performance primarily depends on the initial concentration of metal ions, pH value and temperature, and the chelation action between N atoms of PEl-cell and metal ions plays an important role. Under dynamic adsorption conditions, the saturation adsorption of polyethyleneimine-cellulose is 83.98 mg.g-1 for Cr(Ⅲ) and 377.19 mg-g-1 for Fe(Ⅲ), higher than report- ed data and that of unmodified cellulose. The adsorption can be well described with second-order kinetic equation and Freundlich adsorption model, and AH, AG and 5 of the adsorption are all negative. With 5% HCI as eluent, the elution ratio of Cr(Ill) and Fe(llI) achieved 99.88% and 97.74% at 313 K, respectively. After the porous PEI-cell was reused 6 times, it still presented satisfactory adsorption performance. Above results show the advantages such as easily-acquired raw material, high efficiency, stable recycling oerformance and biodegradability.