Comparative study on interactions between Myxococcus xanthus/Pseudomonas aeruginosa and ionic rare earth minerals
In this paper,Myxococcus xanthus and Pseudomonas aeruginosa,which are common in the rare earth mining environment,were prepared,and the solution behaviors of the two bacteria and their fermentation broth during the interaction with ion-type rare earth ore were comparatively studied.The morphology,structure,distribution of rare earth elements and functional groups of the cells and mineral phases were analyzed by means of scanning electron microscopy,transmission electron microscopy,X-ray diffraction and Fou-rier infrared spectroscopy.The results showed that there were some differences in the interaction processes of the M.xanthus and P.aeruginosa on rare earth minerals.In the leaching process of rare earth minerals,the direct-action system of P.aeruginosa was better than that of the indirect-action system of the fermentation broth,while the direct-action system of the M.xanthus was weaker than that of the indirect action system of the fermentation liquid.In addition,the presence of rare earth minerals can promote the secretion of lip-id and protein components of M.xanthus and inhibit the secretion of polysaccharide components,while for P.aeruginosa,the presence of rare earth minerals has little effect on the secretion of lipid and protein components but promotes the secretion of polysaccharide components.
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