Adsorption characteristics and mechanism of biosolubilization of rock phosphate by Aspergillus niger
Biosolubilization of rock phosphate ( RP) using Aspergillus niger, a phosphate solubilising fungus isolated from the rhizosphere of wheat, as an inoculant to convert insoluble form of phosphorus (P) to soluble P was investigated. Phosphate solubilizing activity of the strain was associated with the release of organic acids and a drop of the pH in the National Botanical Research Institute s phosphate (NBRIP) growth medium. The mechanism of phosphate solubilization by A. niger included direct and indirect action of the strain on RP. Cells of A. niger attached rapidly to RP surface and then excreted organic acids and followed by a decrease in the pH of the culture medium. A negative correlation between pH and content of soluble P but a positive correlation between concentration of organic acids excreted and content of soluble P was found in this study.
biosolubilization soluble phosphorus (P) rock phosphate (RP) Aspergillus niger mechanism
Chunqiao Xiao Ruan Chi Yujuan Fang
Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology,Wuhan Institute of Technology, 693 Xiongchu Avenue, 430073, Wuhan, China
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
417-422
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）