A STUDY ON BIOSORPTIVE REMOVAL OF HEAVY METAL CHROMIUM FROM AQUEOUS CHROMIUM SOLUTION USING APONOGETON NATANS ROOT POWDER

Abstract

Pollution is the main problem due to heavy metal discharges from industries. In this study Aponogeton natans roots powder
(Family: Aponogetonaceae), a biosorbent was selected to remove the heavy metal chromium ion from aqueous
chromium solution. Various parameters like pH, biosorbent dose, equilibrium time and metal ion concentration were
investigated using batch studies for optimization. A kinetic model study and isotherm model fitting study were studied
using Langmuir and Freundlich isotherms. The results revealed that it follows pseudo first order kinetic model and also
fit in the Langmuir and Freundlich isotherms. The thermodynamic parameters ΔG, ΔH and ΔS are investigated and
reported. The results are very much encouraging. So, it can be used as low cost biosorbent in controlling the pollution.