Absorption of heavy metal ions Cu2+, Cd2+ và Pb2+ onto nano-chitosan particles prepared from radiation degraded chitosan

Abstract

Preparation of low molecular weight chitosan by irradiation technique was carried out. Nano-chitosan particles (N-CTS) were synthesised by ionic cross linking of chitosan with sodium tripolyphosphate (TPP). The effects of concentration and molecular weight of chitosan, concentration of TPP on the particle size of the resulting N-CTS were studied. Results showed that a lower molecular weight chitosan corresponded to a smaller N-CTS size. Characteristics of the resulting product were determined by Fourier transform infrared (FT-IR) spectrometer, differential scanning calorimeter (DSC), dynamic light scattering (DLS) and scanning electron microscope (SEM). The ability to absorb metal ions of N-CTS was investigated.