Removal of arsenic ions from aqueous solutions by adsorption onto biopolymeric crosslinked calcium alginate beads

Abstract

The present article discusses the removal of As (V) ions from dilute aqueous solutions by adsorption onto biopolymeric beads of crosslinked calcium alginate. The beads were characterized by FTIR spectroscopy and their water sorption capacity was investigated. The process of adsorption of arsenic ions was monitored and various adsorption parameters were evaluated. The experiments were conducted to optimize the removal capacity and study the influence of various experimental factors such as pH, initial metal ion concentrations, contact time, and solid-to-liquid ratio. The adsorption data were applied to Langmuir and Freundlich isotherm equations, and various static parameters were calculated.