Review on Pretreatment of Effluent Released from Steel Industry

There are many reasons for the environmental pollution.One of the main reason is the vast industrialization, which contributes to 78% of the world’s pollution.There are various industries like leather,food,automobile,pharmaceutical,leather,textile,etc,responsible for the destruction of nature. Steel is one of the major metal produced in huge quantities which releases toxic effluents like nickel,copper,cadmium,lead,nitrates,chromium .These elements lead to great destruction in both flora and fauna by variety of diseases and loss of natural habitats.Biological,physical,and chemical techniques help in the treatment.This paper reviews on treating these effluents initially by simple laboratory methods.