Research article

PHYSICO-CHEMICAL CHARACTERISTICS OF LAKE WATER SAMPLES COLLECTED FROM CHENNAI CITY - BIOREMEDIATION EFFICACY OF BACTERIAL CONSORTIA ON DIFFERENT HEAVY METALS SUPPLEMENTED IN NUTRIENT BROTH SOLUTIONS

Parasakthi Jeyakumar1 and Dr. R Vijayaraghavan2

Online First: January 08, 2023


Based on the significance of microbial accumulation of heavy metal process, combination of heavy metal tolerant bacteria as synergistic behavior was studied in the present research. Lake water samples were collected from four different locations in and around Chennai. Different physico-chemical parameters analyzed for the collected lake water samples. Heavy metals (Zinc, Iron and lead) were studied. Metal accumulation studies were carried out for these metals using Dechloromonas aromatic, Pseudomonas aeruginosa and consortia with Dechloromonas aromatica and Pseudomonas aeruginosa. Biodegradation studies and Percentage loss of heavy metals of individual heavy metal contents in the broth solution inoculated with individual bacteria and consortia (D. aromatica + P. aeruginosa) showed promising results in the present research. The results revealed that bacterial consortia (D. aromatica + P. aeruginosa) played a significant role in reducing the metal contents to the maximum of 27%. Bioaccumulation or biodegradation efficiency of the bacterial consortia on the heavy metals from all four lake samples showed percentage loss from 26.4% to 33.3%. Optimizing the bacterial growth conditions in favour of degrading or accumulating the metal contents from any type of water and waste water would be promising in near future.

Keywords

Heavy metals, Biodegradation, Bioaccumulation, Dechloromonas aromatica and Pseudomonas aeruginosa