细菌对铜矿生物浸出液粘度的影响研究

Effect of Bacteria on Viscosities of Mineral Bio-leaching Solutions

用Ubbelohde粘度计对紫金山铜矿生物浸出液在25℃时的粘度进行了测定,对有菌和无菌两种浸出液的粘度值进行了比较,发现两者有较大的差别,无菌浸出液的粘度明显高于有菌浸出液的粘度,主要是由于在无菌浸出液中,存在大量的Fe3+离子,而Fe3+离子所带电荷较大,使得溶液的带电密度增大,在离子的第一溶剂化层中有较强的定位效应,这种效应使溶液粘度增加的作用变大。同时将有菌和无菌浸出液的粘度值用线性回归方法进行了分析,发现粘度值随浸出液中离子浓度的增加而增大,且呈较好的线性关系。粘度的测定为生物冶金中减少第三相的生成,溶液纯化和分离研究提供了理论基础。

The viscosities of bioleaching solutions for different ion concentrations in the presence and absence of bacteria were determined by Ubbelohde Viscosimeter at 25 ℃. It was found that the viscosities of bioleaching solutions were different in different bioleaching processes. The reason was that a great dealof Fe^3＋ ions in the absence of bacteria resulted in the charge density increasing, which arose from strong orientation effect. Thus, the viscosity increased. The linearity of viscosities was well. The experiment data provided the foundations to the decreasing third solid phase and separating solutions.