皮芯复合离子交换纤维的吸附性能

测定自制皮芯复合离子交换纤维对Zn2+、Cu2+的静态吸附量，研究纤维对Zn2+、Cu2+吸附动力学以及影响吸附性能的主要因素，探讨该纤维材料的化学稳定性和使用再生性能，结果表明：该离子交换纤维对Cu2+、Zn2+吸附的主控步骤为液膜扩散，在实验的浓度范围内(0.005～0.2 mol/L)，纤维对这2种金属离子的吸附均属单分子层吸附，其等温吸附可以用Langmuir和Freundlich方程来描述，该纤维对Cu2+、Zn2+吸附速率快，最大吸附量均超过2mmol/g，最佳pH值为8.0～9.0左右，有良好的吸附性能和使用稳定性。

Absorption properties of sheath-core bicomponent composite ion exchange fibers

The static absorption capacities of the sheath-core bicomponent composite cation exchange fiber for Zn2+、Cu2+ are determined. The absorption kinetics and the main factors affecting absorption capacities of Zn2+、Cu2+ are studied, and its chemical stability and regenerating property are probed. The results indicate that liquid film diffusion is its main controlling step. When the concentration is in the range of 0.005～0.2 mol/L, the adsorption for metal ions belongs to monolayer adsorption. The process of isothermal absorption can be described by Langmuir and Freundlich adsorption isothermal equation. The sheath-core bicomponent composite ion exchange fibers obtained have faster absorption rate for Zn2+、Cu2+. The maximal adsorption capacities for metal ions exceed 2 mmol/g. The best adsorption pH value for Zn2+、Cu2+ is at nearly pH value of 8.0～9.0. This type of ion exchange fiber has good absorption property and working stability to various of metal ions.