Development of biological recovery method of vanadium from water environement

2014 Fiscal Year Final Research Report

• Project/Area Number: 24651079
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental technology/Environmental materials
• Research Institution: Osaka University
• Principal Investigator: SATOSHI Soda 大阪大学, 工学(系)研究科(研究院), 准教授 (30322176)
• Co-Investigator(Kenkyū-buntansha): IKE Michihiko 大阪大学, 大学院工学研究科, 教授 (40222856)
• Co-Investigator(Renkei-kenkyūsha): KURODA Masashi 大阪大学, 大学院工学研究科, 助教 (20511786)
• Research Collaborator: TERASAWA Kanako ; NAGAO Tomoaki
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: バナジウム / 微生物反応 / 沈殿 / 資源回収 / レアメタル

Outline of Final Research Achievements

Technologies for vanadium recovery from water environments are needed for sustainable development. Several bacteria capable of reducing vanadium from soluble V(V) to poorly soluble V(IV) have been reported. They have a potential to precipitate vanadium with other chemicals. The objective of this study was to elucidate culturing conditions affecting vanadium recovery by two vanadate-reducing bacteria: strain V4, which was newly isolated from a sediment sample, and an authentic strain Shewanella oneidensis MR-1. Both bacterial strains were able to reduce V(V) especially in nutrient-poor media. TEM-EDS analysis showed that strain V4 and strain MR-1 formed precipitation containing V, P, and Ca. A larger amount of soluble vanadium was removed by bacteria pre-cultured at high phosphate and calcium concentrations, suggesting they formed precipitation in the form of Cax(VO)y(PO4)z.

Free Research Field

環境工学