Properties of the AOPAN Nanofibers for the Metal Ions Chelation and Kinetics Analysis

Amidoxime polyacryonitrile(AOPAN)nanofibers were generated by the functional reaction between electrospinning polyacryonitrile(PAN) nanofibrous membrane and hydroxylamine hydrochloride.AOPAN nanofibers were used as the support for Cu2+,Cd2+and Fe3+ions chelation to compare the chelated capacities,and the Freundlich isothermal adsorption model was used to analyze the experimental results.Results indicated that the chelated adsorption processes of AOPAN nanofibers to metal ions were in conformity with Freundlich adsorption model.After five times consecutive adsorption and desorption tests,the desorption rate of the Cd2+,Cu2+and Fe3+metal ions maintained more than 80% of their first desorption rate,metal chelated AOPAN nanofibers reflected excellent reusability.