School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, PO Box 11155/4563, Tehran, Iran.
Department of Integrative Biology, University of South Florida, Tampa, FL 33620, USA.
J Environ Manage. 2015 Apr 15;153:144-51. doi: 10.1016/j.jenvman.2015.02.008. Epub 2015 Feb 16.
Removal of vanadium from Linz-Donawits (LD) converter slag was investigated by means of three different species of microbial systems: Acidithiobacillus thiooxidans (autotrophic bacteria), Pseudomonas putida (heterotrophic bacteria) and Aspergillus niger (fungi). The bioleaching process was carried out in both one-step and two-step process and the leaching efficiencies in both cases were compared. Formation of inorganic and organic acids during the leaching process caused mobilization of vanadium. In order to reduce toxic effects of the metal species on the above mentioned microorganisms, a prolonged adaptation process was performed. Both bacteria, A. thiooxidans and P. putida were able to remove more than 90% of vanadium at slag concentrations of 1-5 g L(-1) after 15 days. Also, the maximum achievable vanadium removal in the fungal system was approximately 92% at a slag concentration of 1 g L(-1) after 22 days.
氧化亚铁硫杆菌（自养细菌）、铜绿假单胞菌（异养细菌）和黑曲霉（真菌），研究了从林茨-多纳维茨（LD）转炉渣中提取钒。生物浸出过程采用一步法和两步法进行，比较了两种情况下的浸出效率。浸出过程中无机酸和有机酸的形成导致钒的迁移。为了降低金属物种对上述微生物的毒性影响，进行了延长的适应过程。细菌 A. thiooxidans 和 P. putida 在 15 天后，在 1-5 g/L 的炉渣浓度下，能够去除超过 90%的钒。此外，真菌体系在 22 天后，在 1 g/L 的炉渣浓度下，钒的最大去除率约为 92%。
