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本工作评价了在方解石和菱镁矿浮选中,用Rhodococcus opacus菌(不透明红球菌)(缩写为R.opacus菌)作为生物捕收剂的可能性。测定了R.opacus菌与方解石和菱镁矿作用前后的电泳迁移率,试验结果表明,R.opacus菌在两种矿物表面上的附着使得矿物的Zeta电位曲线偏移,细菌附着试验结果证明,细菌对菱镁矿的亲合力比对方解石的亲合力要强。R.opacus菌在这两种矿物表面上的吸附速率试验结果表明,细菌在这两种矿物表面上的吸附速度很快,5min后吸附量就达到最大值。细菌在这两种矿物表面上的吸附等温线具有朗格缪尔L-Ⅱ类型特点。在pH5.0和R.opacus菌浓度为100.106时菱镁矿的浮选回收率为100%,在pH7.0和R.opacus菌浓度为220.106时方解石的浮选回收率为55%。根据所获得的附着试验结果解释了生物浮选结果。本浮选基础研究结果表明,应用R.opacus菌作为生物捕收剂具有很大的潜力,它们可以用于矿物浮选工业中。
This work evaluates the possibility of using Rhodococcus opacus (Rhodococcus opacus) (abbreviated as R. opacus) as a biochar in calcite and magnesite flotation. The electrophoretic mobility of R.opacus bacteria before and after the action of calcite and magnesite was measured. The results showed that the attachment of R.opacus to the two mineral surfaces shifted the Zeta potential curve of the minerals, The affinity of bacteria for magnesite is stronger than for calcite. The rate of adsorption of R.opacus on these two mineral surfaces showed that the bacteria adsorbed very rapidly on both mineral surfaces and reached their maximum after 5 minutes. The bacterial adsorption isotherms on the two mineral surfaces have the Langmuir L-II type profile. The flotation recovery of the magnesite was 100% at pH 5.0 and R. opacus at a concentration of 100.106. The flotation recovery of calcite at pH 7.0 and R. opacus at a concentration of 220.106 was 55%. The biological flotation results are explained based on the results of the attachment test obtained. The basic results of this flotation study show that the use of R.opacus bacteria as biochar has great potential and can be used in the mineral flotation industry.