Effects of Perchlorate and Other Groundwater Inorganic Co-Contaminants on Aerobic RDX Degradation.

ABSTRACT: Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) pollution is accompanied by other co-contaminants, such as perchlorate and chlorates, which can retard biodegradation. The effects of perchlorate and chlorate on aerobic RDX degradation remain unclear. We hypothesized that they have a negative or no impact on aerobic RDX-degrading bacteria. We used three aerobic RDX-degrading strains-Rhodococcus strains YH1 and T7 and Gordonia YY1-to examine this hypothesis. The strains were exposed to perchlorate, chlorate, and nitrate as single components or in a mixture. Their growth, degradation activity, and gene expression were monitored. Strain-specific responses to the co-contaminants were observed: enhanced growth of strain YH1 and inhibition of strain T7. Vmax and Km of cytochrome P450 (XplA) in the p

SUBMITTER: Yadav A 

PROVIDER: S-EPMC8949498 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature