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Sökning: WFRF:(Li Cai) > Högskolan i Borås

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  • Ruan, Yunjie, et al. (författare)
  • Simultaneous aerobic denitrification and antibiotics degradation by strain Marinobacter hydrocarbonoclasticus RAD-2
  • 2020
  • Ingår i: Bioresource Technology. - : Elsevier. - 0960-8524 .- 1873-2976. ; 313
  • Tidskriftsartikel (refereegranskat)abstract
    • Simultaneous denitrification and antibiotics (oxytetracycline, OTC and ciprofloxacin, CFX) degradation was evaluated using a typical aerobic denitrifying strain Marinobacter hydrocarbonoclasticus RAD-2. There was no significant influence on the aerobic nitrate removal efficiency of strain RAD-2 in the presence of these two antibiotics. Along with denitrification, the average degradation rate of 2.92 mu g OTC L(-1)h(-1) was achieved, while no degradation was observed for CFX. The growth behavior indicated that an insignificant inhibition effect could have occurred at an antibiotics dosage lower than 300 mu g/L. The transcriptional results revealed that antibiotics exposure caused (< 2h) down-regulation of the denitrifying related genes, but triggered a significant subsequent up-regulation (4 h). Less nitrous oxide productions were observed in both aerobic and anoxic denitrification processes with antibiotics. Overall, the hormesis effect caused by antibiotics exposure indicated a potential approach to enhance the co-metabolism degradation performance for nitrate and antibiotics in aerobic denitrification.
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