The effects of K+ growth conditions on the accumulation of cesium by the bacterium Thermus sp. TibetanG6.
The accumulation of cesium by the bacterium Thermus sp. TibetanG6 was examined under different K+ growth conditions. The effects of external pH and Na+ on the accumulation of cesium were also studied, and the mechanism involved was discussed. K+ regimes played an important role in the accumulation of cesium by the strain TibetanG6. The quantity of cesium accumulated (24 h) was much higher in K+-deficient regime than that in K+-sufficient regime. The pH and Na+ had different effects on the accumulation of cesium in the two K+ regimes. IR spectra analyses indicated that the biosorption is a process of homeostasis with cesium initially accumulated on the cell wall.
Wang
Hailei
H
R&D Center for Saline Lake and Epithermal Deposits, Chinese Academy of Geological Sciences, Beijing 100037, China. whailei@sohu.com
Kong
Fanjing
F
Zheng
Mianping
M
D002586:Cesium / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D011188:Potassium / Q000494:pharmacology*; D012964:Sodium / Q000494:pharmacology; D013055:Spectrophotometry, Infrared; D013824:Thermus / Q000187:drug effects* / Q000254:growth & development; D013997:Time Factors
D002586:Cesium; D012964:Sodium; D011188:Potassium