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借助吸附量测定、动电测量、微量浮选试验和絮凝试验考查了方铅矿和闪锌矿与多黏芽胞杆菌代谢物之间的相互作用。在pH 6～ 7范围内 ,代谢物的碳水化合物在闪锌矿上的吸附密度最大 ,而在方铅矿上的吸附密度随 pH升高而一直增大。相反地 ,细菌蛋白质在两种矿物上的吸附密度随 pH升高而连续降低。代谢物的两种组分对方铅矿的吸附亲合力比对闪锌矿要高。矿物经代谢物处理后 ,其电泳迁移率向负值小的方向变化 ,并且 ,其值与作用时间长短有关。有趣的是 ,在用碳水化合物处理后 ,闪锌矿等电点向 pH高的方向偏移 ,但是 ,方铅矿的等电点不变化。方铅矿与闪锌矿人工混合物的生物浮选和生物絮凝试验结果表明 ,在适当的条件下 ,方铅矿选择性地被抑制和絮凝。共沉淀试验证明 ,在水溶液中 ,铅和锌组分被代谢产物所络合。文中讨论了两种硫化矿物与生物药剂作用的机理
The interaction between galena and sphalerite and M. glutamicum metabolites was examined by means of sorption measurements, electrokinetic measurements, trace flotation tests and flocculation tests. In the range of pH 6 ~ 7, the metabolites have the highest adsorption density on sphalerite, while the adsorption density on galena increases with pH. Conversely, the adsorption density of bacterial proteins on both minerals decreases continuously with increasing pH. The two components of metabolites have a higher affinity for galena adsorption than sphalerite. Mineral metabolites after treatment, the electrophoretic mobility to a small negative direction, and its value and duration of action. Interestingly, the sphalerite isoelectric point shifts to higher pH after treatment with carbohydrates, however, the galena does not change the isoelectric point. The biological flotation and bioflocculation test results of artificial mixtures of galena and sphalerite show that galena is selectively inhibited and flocculated under the proper conditions. Coprecipitation experiments demonstrated that lead and zinc components are complexed with metabolites in aqueous solutions. The mechanism of the interaction between two sulphide minerals and biological agents is discussed in this paper