Application of Phosphate-Solubilizing Bacteria Activating Phosphate Materials in Solidification of Soil Heavy Metal
Removal of heavy metals by phosphate-solubilizing bacteria (PSB) activating phosphate materials in simulated heavy metal liquid environment was studied. Calcium phosphate was a kind of functional carrier material under action of PSB, accelerating the reaction to form phosphate precipitation of heavy metal. The results indicated that the removal of heavy metals with activated phosphate materials by PSB occurred within 15 days, and achieved high removal rates of Pb2+, Cu2+, Zn2+ and Cd2+ comparing with the phosphate materials inactivated. Therefore the activated phosphate materials by PSB could be a functional material for efficiently removing heavy metal from contaminated soil.
KeywordsHeavy metals Immobilization Phosphate-solubilizing bacteria Phosphate materials
This work was supported by the National Natural Science Foundation of China under grant numbers U1402234, 41573074, 50904011, and 31300025; the nation high-level youth talents special support plan; the Guangxi scientific research and technology development plan under grants GuikeAB16380287 and Guikegong14124004-3-1; the public welfare fund of the Ministry of Environmental Protection of People’s Republic of China under grant number 201509049; and Program of International S & T Cooperation S2016G2135.
- 1.Ministry of environmental protection, Ministry of land and resources, National survey of soil pollution survey. China Environ. Prot. Ind. 5, 10–11 (2014)Google Scholar
- 2.S. Mignardi, A. Corami, V. Ferrini, Evaluation of the effectiveness of phosphate treatment for the remediation of mine waste soils contaminated with Cd, Cu, Pb, and Zn. Chemosphere 86(4), 354 (2012)Google Scholar
- 3.X. Cao, A. Wahbi, L. Ma et al., Immobilization of Zn, Cu, and Pb in contaminated soils using phosphate rock and phosphoric acid. J. Hazard. Mater. 164(2–3), 555–564 (2009)Google Scholar
- 4.R.X. Cao, L.Q. Ma, M. Chen et al., Phosphate-induced metal immobilization in a contaminated site. Environ. Pollut. 122(1) 19–28 (2003)Google Scholar
- 5.L. Hui, W.U. Xiao-Qin, J.H. Ren et al., Isolation and identification of phosphobacteria in poplar rhizosphere from different regions of China. Pedosphere 21(1), 90–97 (2011)Google Scholar
- 6.H.P. Jin, N. Bolan, M. Megharaj et al., Isolation of phosphate solubilizing bacteria and their potential for lead immobilization in soil. J. Hazard. Mater. 185(2–3), 829–836 (2011)Google Scholar
- 7.J.H. Park, N. Bolan, M. Megharaj et al., Concomitant rock phosphate dissolution and lead immobilization by phosphate solubilizing bacteria (Enterobacter sp.). J. Environ. Manage. 92(4), 1115 (2011)Google Scholar