CHARACTERIZATION OF ZINC TOLERANT BACTERIAL STRAINS FROM THE ELECTROPLATING EFFLUENT CONTAMINATED SOIL

Abstract

Toxic heavy metal pollution is expanding throughout the world as a result of industrial progress. This work focuses on the characterization of zinc tolerant bacterial strains from an electroplating effluent polluted soil sample in order to minimize/control metal pollution. pH, Temperature, Electrical Conductivity, Total Solids, Total Dissolved Solids, Total Suspended Solids, Chloride, Sodium, Calcium, Potassium, Biological Oxygen Demand, and Chemical Oxygen Demand were all measured and evaluated in the zinc-containing electroplating effluent sample. The sixteen bacterial strains were isolated from a polluted soil sample with electroplating effluent and identified using morphological and biochemical features. Using nutritional agar medium enriched with zinc metal, all of the chosen strains were evaluated for metal tolerance. Only six bacterial strains were chosen as potential metal tolerant strains based on the screening study, and these strains were characterized under various environmental conditions such as different pH (pH 5, pH 7, and pH 9), different temperatures (5°C, 28°C, 37°C, and 45°C), and different metal concentrations (100ppm, 200ppm, 300ppm and 400ppm). Pseudomonas sp strain 1 was shown to be a better zinc resistant organism, according to the findings