论文部分内容阅读
对稀土资源的开采和利用,如稀土微肥的出现,使得稀土与土壤微生物之间产生了相互的影响。为了探明上述两者间的互作机理,对一株能够解磷、解钾的巨大芽孢杆菌对稀土离子的吸附作用进行了考察。结果显示,这株菌对La3+和Ce3+的吸附率分别为29.2%、30.2%,最大吸附量分别为75 mg/L、30 mg/L,而且均能在30 min内进行快速吸附,在60 min内达到吸附平衡。在此菌株最适生长温度范围内的三个温度(25℃、30℃、40℃)下的研究结果表明,吸附温度对吸附过程无明显影响。经载体(海藻酸钠(SA)-硅藻土)固定化后,在160 r/min的转速下该菌株对La3+和Ce3+的吸附率分别提高了20.25%、20.02%。
The exploitation of rare earth resources and utilization, such as the emergence of rare earth micronutrients, making rare earth and soil microorganisms have had mutual influence. In order to find out the mechanism of the interaction between them, the adsorption of rare earth ions on a Bacillus megaterium which can dephosphorize and dissolve potassium was investigated. The results showed that the adsorption rates of La3 + and Ce3 + for this strain were 29.2% and 30.2%, respectively. The maximum adsorption capacity was 75 mg / L and 30 mg / L, respectively. Within reach adsorption equilibrium. The results of the three temperatures (25 ℃, 30 ℃, 40 ℃) within the optimum growth temperature range showed that the adsorption temperature had no significant effect on the adsorption process. After immobilized on the carrier (sodium alginate (SA) -diatomite), the adsorption rates of La3 + and Ce3 + increased by 20.25% and 20.02% at 160 r / min respectively.