Isolation of phosphate solubilizing bacteria and their potential for lead immobilization in soil

Park, Jin Hee, Bolan, Nanthi, Megharaj, Mallavarapu and Naidu, Ravi (2011) Isolation of phosphate solubilizing bacteria and their potential for lead immobilization in soil. Journal of Hazardous Materials, 185 2-3: 829-836. doi:10.1016/j.jhazmat.2010.09.095


Author Park, Jin Hee
Bolan, Nanthi
Megharaj, Mallavarapu
Naidu, Ravi
Title Isolation of phosphate solubilizing bacteria and their potential for lead immobilization in soil
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
1873-3336
Publication date 2011-01-31
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2010.09.095
Volume 185
Issue 2-3
Start page 829
End page 836
Total pages 8
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Collection year 2012
Language eng
Formatted abstract
Lead (Pb), a highly toxic heavy metal forms stable compounds with phosphate (P). The potential of phosphate solubilizing bacteria (PSB) to immobilize Pb by enhancing solubilization of insoluble P compounds was tested in this research. Eighteen different PSB strains isolated from P amended and Pb contaminated soils were screened for their efficiency in P solubilization. The PSB isolated from P amended soils solubilized 217-479. mg/L of P while the PSB from Pb contaminated soil solubilized 31-293. mg/L of P. Stepwise multiple regression analysis and P solubility kinetics indicated that the major mechanism of P solubilization by PSB is the pH reduction through the release of organic acids. From the isolated bacteria, two PSB were chosen for Pb immobilization and these bacteria were identified as Pantoea sp. and Enterobacter sp., respectively. The PSB significantly increased P solubilization by 25.0% and 49.9% in the case of Pantoea sp., and 63.3% and 88.6% in the case of Enterobacter sp. for 200 and 800. mg/kg of rock phosphate (RP) addition, respectively, thereby enhancing the immobilization of Pb by 8.25-13.7% in the case of Pantoea sp. and 14.7-26.4% in the case of Enterobacter sp. The ability of PSB to solubilize P, promote plant growth, and immobilize Pb can be used for phytostabilization of Pb contaminated soils.
Keyword Pb contamination
Pb immobilization
Phosphate solubilizing bacteria (PSB
Rock phosphate
P solubilization
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Mined Land Rehabilitation Publications
 
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Created: Tue, 17 Sep 2013, 12:03:48 EST by Jin Hee Park on behalf of Centre For Mined Land Rehabilitation