Lead Solubilization and Accumulation by Two Strains of Pseudomonas Obtained from a Contaminated Alfisol's Effluent in Southwestern Nigeria |
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| Authors: | E O Ekundayo K Killham |
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| Institution: | (1) Department of Soil Science, Factilty of Agriculture, University of Benin, Benin City, Nigeria;(2) Department of Plant and Soil Sciences, University of Aberdeen, Aberdeen, Scotland, United Kingdom |
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| Abstract: | Two strains of Pseudomonas species (B2 and D5)selected from an array of lead solubilizing and accumulatingbacteria obtained from the effluent contaminated soil samples of abattery manufacturing factory were studied. Increase in pH between 4.0 and 6.0 favoured the growth of isolates: Peaklog10 cfu mL–1 values of 7.1, 7.5 and 8.5 wereobtained at pH 4, 5 and 6, respectively.Cell bound lead concentrations for B2 (0.34 mg mL–1)and D5 (0.30 mg mL–1) obtained by direct contact withPbs were greater than lead concentrations of 0.89 and 0.25 mg mL–1 for B2 and D5, respectively,obtained in dialyzed cultures. These cell bound lead concentration in undialyzed cultures were alsogreater than lead concentrations of 0.03 and 0.07 mg mL–1 for B2 and D5 in culture supernatants. Glucose addition did nor improve lead accumulation in the isolates.Exploitation of such isolates for the biotreatment of lead ladeneffluent was conducted. |
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| Keywords: | accumulation alfisol bacteria battery manufacturingfactory effluent lead solubilization Pseudomonas sp |
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