Bioremediation of Cadmium by Mixed Indigenous Isolates Serratia liquefaciens BSWC3 and Klebsiella Pneumoniae RpSWC3 Isolated from Industrial and Mining Affected Water Samples

Document Type : Original Research Paper


1 Department of Agricultural Microbiology, College of Agriculture, Indira Gandhi Krishi Viswavidyalaya, Raipur, 492012, CG, India

2 Department of Soil Science and Agril. Chemistry, College of Agriculture,Indira Gandhi Krishi Viswavidyalaya, Raipur,492012, CG, India


A total of 58 Cadmium tolerant bacterial isolates were isolated from 26 samples collected from 20 villages/city of different contaminated water samples from industrial and mining affected areas of Chhattisgarh (India). Out of 58 bacterial isolates, 15 bacterial isolates were able to grow in presence of 40 mM cadmium chloride. These fifteen were further screened by biochemical characterization, antibiotic susceptibility and presence of czcA gene. However, finally five selected isolates (BSWC3, RgCWC2, RgUWC1, RpSWC3, KDWC1) were identified by 16S rRNA gene sequencing belonged to the genus Serratia liquefaciens, Klebsiella quasipneumoniae subsp. similipneumoniae, Klebsiella pneumoniae, Pantoea dispersa and Enterobacter tabaci, respectively. Among these two best culture Serratia liquefaciens BSWC3 and Klebsiella pneumoniae RpSWC3 were testes for their bioremediation efficiency individually as well as in mixed culture. Atomic Absorption spectrophotometer analysis of samples revealed that cadmium (Cd) tolerant bacterial isolates BSWC3, RpSWC3 and Combination of BSWC3 and RpSWC3 were significantly reduce of cadmium concentration i.e. 44.46%, 40% and 50.92%, respectively as compared to control. Therefore, the finding of the present study revealed the use of mixed culture or consortium of indigenous isolates is the better option for bioremediation of heavy metals.


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