Abstract
Some of the heavy metals are among the list of harmful elemental substances, such as iron, chromium, copper, nickel, lead, and zinc. These elements can be found in the industrial discharge, such as refinery effluent.
Our study mainly concentrates on locating suitable, easily available, and economical precipitating agents and determining their optimal concentration in which they can be used to achieve the maximum efficiency, regarding the reduction of percentage concentration of metallic constituents in the refinery effluents or in other industrial discharges.