CAJ | 학술논문

为考察红城红球菌(Rhodococcus erythropolis,R. erythropolis)作为赤铁矿捕收剂使用的可能性及效果,对R. erythropolis形貌、细胞壁成分及其吸附前后赤铁矿、石英表面电性、疏水性进行分析,对赤铁矿、石英单矿物以及赤铁矿与石英矿1:1(质量比)混合矿进行浮选实验,对其在赤铁矿表面的吸附状况及吸附机理进行研究.结果表明,杆状R. erythropolis表面既含有非极性基团,又含有极性基团,使得其表面具有较高的负电性和较强的疏水性,因而对赤铁矿的吸附作用明显大于对石英的吸附作用.当以此细菌为捕收剂、在溶液 pH 值为6、R. erythropolis用量为75 mg/L时,赤铁矿的回收率为89.68%,而石英的回收率仅为26.25%.混合矿经过一次浮选,可获得铁品位和回收率分别为50.08%和76.41%的铁精矿.R. erythropolis在赤铁矿表面发生复杂的化学吸附且使赤铁矿颗粒形成疏水絮团,从而证实R. erythropolis可作为赤铁矿的捕收剂使用.
위고찰홍성홍구균(Rhodococcus erythropolis,R. erythropolis)작위적철광포수제사용적가능성급효과,대R. erythropolis형모、세포벽성분급기흡부전후적철광、석영표면전성、소수성진행분석,대적철광、석영단광물이급적철광여석영광1:1(질량비)혼합광진행부선실험,대기재적철광표면적흡부상황급흡부궤리진행연구.결과표명,간상R. erythropolis표면기함유비겁성기단,우함유겁성기단,사득기표면구유교고적부전성화교강적소수성,인이대적철광적흡부작용명현대우대석영적흡부작용.당이차세균위포수제、재용액 pH 치위6、R. erythropolis용량위75 mg/L시,적철광적회수솔위89.68%,이석영적회수솔부위26.25%.혼합광경과일차부선,가획득철품위화회수솔분별위50.08%화76.41%적철정광.R. erythropolis재적철광표면발생복잡적화학흡부차사적철광과립형성소수서단,종이증실R. erythropolis가작위적철광적포수제사용.
@@@@The possibility and effect of Rhodococcus erythropolis (R. erythropolis) as a flotation collector for hematite were investigated. The surface morphology and cell wall constituent of R. erythropolis were analyzed. The surface potentials of the strain, hematite and quartz before and after adsorption with R. erythropolis were measured. Flotation tests for the collection of pure hematite and pure quartz respectively and the separation of hematite-quartz mixture (1:1, mass ratio) were carried out. The adsorption characteristics and mechanisms were also discussed. The results show that the rod-shaped bacterium is detected with hydrophobic and hydrophilic groups on the cell wall, showing highly negative charged and strongly hydrophobic characteristics. The adsorption is significantly more selective onto hematite than onto quartz. The hematite recovery of 89.68%and quartz recovery of only 26.25%are obtained under solution pH value of 6 and cell concentration of 75 mg/L. Iron concentrate with the grade of 50.08%and recovery rate of 76.41%is recovered from the mixture after one-stag flotation. The chemical adsorption of the strain onto hematite makes hematite form hydrobolic agglomerate. It is confirmed that R. erythropolis can be acted as the collector for hematite.