Scavenging of Toxic Metal Ions from Aqueous Solution by Using Column of Modified Magnifera Indica Tree Bark Substrate

Abstract

The uncontrol growth of industrialisation in the world is responsible for change in chemical and biological properties of both surface and ground water which constitute a health hazard. The heavy metal render the water unsuitable for drinking and are highly toxic. Removal of these material is therefore essential.Meagre quantity of water which is available for human use is also getting contaminated because of industrialisation, urbanisation, population exodus.The major contaminants responsible for water pollution is as follows- Inorganic pollutants and toxic metals , sediments , oxygen demanding wastage , radioactive substances, thermal pollutants ,pesticides , farm waste and fertilizers, autoexhaust as water pollutants , organics ,synthetic detergents , disease causing agent , plant nutrient , biological pollutants(Nuisance , organism like algae etc and suspended matter ). The salt of various heavy metal and potentially hazardous material are being discharged in increasing amounts into the aquatic environment. Water containing significant concentration of some if the heavy metal ions are toxic to human being , animal as well as aquatic organism. The toxicity of some heavy metal ions even at the trace level has been recognized with respect to public health for many years . Metals such as Hg, Pb,Cd,Cu,and Cr fall under this category . Many metals have been evaluated as toxic to aquatic life above certain threshold toxicity level . Rapid industrialisation and technological development enhance the concentration of heavy metal poisoning posing a significant threat to the environment and public health because of their toxicity , accumulation in the food chain and persistance in nature . Industrial waste constitute the major source of various kind of metal pollution in natural water. The heavy metals are stable and persistant environmental contaminants . Since they can't be degraded and destroyed . The metal ions are harmful to aquatic life and water contaminated by toxic metal ions remains a serious health problems. The present study aimed at effective management and purification of industrial waste water using cheaper and locally available tree bark for removal of heavy metal and a substitute to conventional . The effect of tree bark on Potassium dichromate , Cobalt chloride ,on the metal contents on industrial waste water was investigated in the pH of 4-6 . It is observed that the process of uptake followed first order adsorption, rate , expression and obey langmuir and frendlich model of adsorotion .