Preparation of high porous nanocomposite of chitosan, hydroxyapatite and graphene for dye adsorption and bacterial immobilation
Abstract
This paper aims to use the components recovered from seafood by-products to fabricate high porous nanocomposites for dye adsorption and bacterial immobilization. The nanocomposites were prepared by a facile method using starting materials, including chitosan, hydroxyapatite nanoparticles, and graphene. Chitosan and hydroxyapatite were recovered from moulted shrimp shells and catfish bones, respectively. The as-prepared nanocomposites had a high porosity and could separated easily for reuse. The results showed that the highest adsorption capacity of the nanocomposite for methylene orange was 129.98 mg/g and the adsorption efficiency was over 98% after five recycles. Besides, the obtained materials could immobilized over 5.4% bacteria for 108h even under wet-state. These findings suggest seafood by-products as a potential source for preparation of advanced composites for wastewater treatment.
