Biosorption of copper, cadmium and lead by copper-resistant bacteria isolated from Mogpog River, Marinduque [Philippines]
2007
Parungao, M.M. | Tacata, P.S. | Tanayan, C.R.G. | Trinidad, L.C.
Isolation and selection of copper-resistant bacteria were carried out from a collected water sample of Mogpog River. The sample was analyzed for copper (Cu), Cadmium (Cd) and lead (Pb) content for simulation purposes. The selected most copper-resistant bacteria, Stenotrophomonas maltophilia, was exposed to 50, 10, and 20 ppm of Cu, Cd, and Pb, respectively, in primary (single metal) and ternary (mixed metals) solutions. Bacterial cells were separated from solutions using Atomic Absorption Spectrophotometry. Biosorption profile was determined to be CuPbCd and PbCuCd in primary and ternary solutions, respectively. Biosorption of the three heavy metals was higher in primary solutions than in ternary solutions. Approximately 22% of Cu, 24% of Cd, and 42.75% of Pb were removed from primary solutions; 16% of Cu, 8% of Cd, and 35% of Pb, were removed from ternary solutions by S. maltophilia.
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