【摘要】 硅酸盐矿物的结构会影响硅酸盐细菌的生长。选用一株硅酸盐细菌JG-02,观察该细菌分别在含高岭石、石英、铝土矿的培养基中生长规律,监测培养过程中的理化参数以及浸出前、后固体矿样的表面变化,来了解硅酸盐细菌对不同结构的硅酸盐矿物的作用。结果表明:该菌株在不同矿物环境中生长规律基本一致,但细菌数量、产酸、产多糖的能力差别较大,菌株在含高岭石的培养基中生长较好、产酸产多糖较多,浸出液中SiO2含量最多(40.8mg/L),而在含石英的培养基中则较少,但红外结果显示试验菌株与高岭石、石英发生了相似的作用。因此,层状结构硅酸盐矿物比架状结构的更利于JG-02的生长、侵蚀。更多还原

【Abstract】 Silicate mineral structures affect silicate bacterial growth.A study is carried out on the growth of a strain of silicate bacteria named JG-02in the media containing kaolin,quartz,bauxite respectively by monitoring the physical and chemistry parameters,surface changes of silicate minerals during bioleaching.The results show that the strain has the similar growth curves in different media,but the number of bacteria,acid and polysaccharide production capacity vary greatly.The strain produces more acid,polysaccharide and maximum SiO2(40.8mg/L)in kaolin medium.The quartz’s is less.However,similar changes are shown on surfaces of kaolin and quartz by infrared ray.Therefore,the growth of JG-02and mineral erosion will happen more easily on the surfaces of layered silicate minerals than the frameworks.更多还原