Journal
CHEMOSPHERE
Volume 113, Issue -, Pages 175-181Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2014.05.039
Keywords
Lysinibacillus sphaericus; Lysinibacillus fusiformis; Biochar; Phosphorus solubilization; Biochemical condition
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Funding
- Key Special Program on the S&T for the Pollution Control and Treatment of Water Bodies [2012ZX07103-001]
- National Key Technology R&D Program of the Ministry of Science and Technology [2012BAJ08B00]
- National 863 Program [2012AA063608-01]
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Biochar, a massive byproduct of biomass pyrolysis during biofuel generation, is a potential P source for the mitigation of P depletion. However, the chemical and biological effect of the release of P from biochar is still unclear. In this study, two types of Lysinibacillus strains (Lysinibacillus sphaericus D-8 and Lysinibacillus fusiformis A-5) were separated from a sediment and their P-solubilizing characteristics to biochar was first reported. Compared with the bacterial mixture W-1 obtained from a bioreactor, the introduction of A-5 and D-8 significantly improved P solubilization. The release of P from biochar by A-5 and D-8 reached 54% and 47%, respectively, which is comparable to that under rigorous chemical conditions. SEM images and XPS spectra demonstrated that the physicochemical properties of the biochar surface have changed in the process which may be caused by the activities of the microbes. (C) 2014 Elsevier Ltd. All rights reserved.
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