Isolation and Screening of Heavy Metal Resistant Microorganisms From Industrial Soil

Two industrial soils around west Godavari districts were analyzed for the concentration of nine heavy metals such as zinc, nickel, copper, manganese, cadmium, chromium, lead, iron and arsenic using atomic absorption spectrophotometer and simultaneously isolated nine morphologically distinct bacterial cultures from the same soil to check for the metal tolerance against copper, zinc and lead. The analyzed data revealed that iron and manganese metals were found to be the most abundant metals in these industrial soils and also noticed that the industrial soil 2 contained high amount of Cu, Zn and Pd. Control sample contained very low concentrations of the above mentioned heavy metals. That is therefore nine bacterial cultures (DPMC1-5 and TSC1-4) were checked for their metal resistance to Cu, Zn and Pb in nutrient broth at various metal concentrations. In in vitro application there was a drastically metal reduction observed in soils inoculated with nine bacterial strains. It can be concluded that this work will be the reference for the bioremediation of heavy metal polluted soils. As the industrialization in Bhimavaram creating the environmental pollution and hence treatment of industrial waste with metal resistant microorganisms called bioremediation is highly essential to clear the metal pollution instead of releasing industrial effluents into nearby water bodies or fields or choosing a costly chemical treatments.