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Bioleaching of chromium, copper, manganese and zinc from coal ash were investigated using isolates from coal ash ponds particularly Psuedomonas spp . Six (6) different coal ash ponds were examined however, after initial screening Psuedomonas spp . were only present in three (3) coal ash ponds. Among the three coal ash ponds, results showed that eight (8) putative Pseudomonas spp . isolates were present that were identified using the Polymerase Chain Reaction (PCR). Using the eight putative Pseudomonas spp . for bioleaching at optimum conditions and 15 days, the pH value ranges from 8.26 to 8.84 which was basic in nature. Moreover, the maximum metal leached were 8.04% Cr, 12.05% Cu, 4.34% Mn and 10.63% Zn.

Bioleaching of trace metals from coal ash using local isolate from coal ash ponds