ELECTROSPUN CHITOSAN-POLYETHYLENE OXIDE NANOFIBRES FOR ADSORPTION OF COPPER IONS FROM AQUEOUS SOLUTIONS

摘要

1. Chitosan Electrospun nanofibres characterisation: 1.1 Continuous, uniform, beadless nanofibres with nanometric scale diameter of about 106 nm 2. Adsorption efficiency for copper 2.1 A copper ions removal capacity of 50% was reached after 4h by using only 25mg of chitosan nanofibres 2.2 Results showed that the adsorption capacity of chitosan nanofibres is improved with the increase of adsorbent dose. 3. Kinetic study 3.1 Adsorption of Copper ions onto chitosan nanofibres fits well with the pseudo-second order kinetic model 3.2 Chimisorption by chelation mechanism for Copper ions (Cull) 4. Equilibrium study 4.1 Langmuir model showed a better fit to adsorption data with a high R~2 4.2 Monolayer adsorption 4.3 Equal energies of adsorption 4.4 Adsorption is reversible 4.5 Temperature had no significant effect: Spontaneous reaction.