Significance and Impact of the Study: This study focused on the effect of rare earth (REs) on the biodegradation of polycyclic aromatic hydrocarbons (PAHs). The RE ions Ce 3+ and Y 3+ inhibited Moraxella osloensis CFP312 from degrading phenanthrene without affecting its glucose utilization. This inhibition effect can be relieved through co-cultivation with Bacillus subtilis MSP117, which has high adsorption capacity for RE ions in liquid and slurry systems. MSP117 adsorbed and fixed RE ions on its cell surfaces, thereby reducing the bioavailability of RE ions. This study provides a feasible way for the bioremediation of the co-pollution of RE and organic pollutants.
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