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.