Author/Authors :
Qiu، نويسنده , , Guanzhou and Li، نويسنده , , Qian and Yu، نويسنده , , Runlan and Sun، نويسنده , , Zhanxue and Liu، نويسنده , , Yajie and Chen، نويسنده , , Miao and Yin، نويسنده , , Huaqun and Zhang، نويسنده , , Yage and Liang، نويسنده , , Yili and Xu، نويسنده , , Lingling and Sun، نويسنده , , Limin and Liu، نويسنده , , Xueduan، نويسنده ,
Abstract :
A mesophilic acidophilic consortium was enriched from acid mine drainage samples collected from several uranium mines in China. The performance of the consortium in column bioleaching of low-grade uranium embedded in granite porphyry was investigated. The influences of several chemical parameters on uranium extraction in column reactor were also investigated. A uranium recovery of 96.82% was achieved in 97 days column leaching process including 33 days acid pre-leaching stage and 64 days bioleaching stage. It was reflected that indirect leaching mechanism took precedence over direct. Furthermore, the bacterial community structure was analyzed by using Amplified Ribosomal DNA Restriction Analysis. The results showed that microorganisms on the residual surface were more diverse than that in the solution. Acidithiobacillus ferrooxidans was the dominant species in the solution and Leptospirillum ferriphilum on the residual surface.
Keywords :
column leaching , Bacterial community analysis , Mesophilic acidophiles , uranium
