Preparation and characterization of new foam adsorbents of poly(vinyl alcohol)/chitosan composites and their removal for dye and heavy metal from aqueous solution

By Xiaoli Li, Yan-feng Li, Sidi Zhang, Zhengfang Ye. 2012

151 citations recorded by the source corpus.

Abstract A novel composite foam of poly(vinyl alcohol) (PVA) and chitosan (CS), i.e. PVA/CS composites, was prepared as an adsorbent for the removal of malachite green (MG) and Cu2+ from aqueous solution. The PVA/CS composite foam held the advantages of PVA and CS. The introduction of CS improved significantly the adsorption capacities of Cu2+ and MG. The resulting foam with the interconnected pores exhibited good mass transfer property, processing properties and stability. Meanwhile, PVA/CS foam adsorbents had been proved with the excellent adsorption and fast kinetics for MG and Cu2+. However, MG and Cu2+ in binary system exhibited competitive adsorption. The adsorption isotherms, kinetics and thermodynamics of PVA/CS foams for MG and Cu2+ were studied in detail, moreover, the effects of ionic strength and foreign pollutants were also investigated. Additionally, desorption and reusability of PVA/CS foam was also investigated based on sequential adsorption–desorption cycles. PVA/CS foam adsorbents could simultaneously remove MG and Cu2+ when they existed at low concentrations (

Subfields: Industrial and Manufacturing Engineering, Mechanical Engineering, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/ae3a55acac9b5083646c79d89d7019113bf321f1