Nanoparticles Impact on Wastewater Treatment Efficiency and Antibiotic Resistance

Strategic Insights -

Research conducted in Qingdao, People's Republic of China, has explored the effects of copper oxide nanoparticles (CuO NPs) and humic acid (HA) on wastewater treatment efficiency and the expression of resistance genes. The study used sequencing batch bioreactors (SBRs) and analyzed the extracellular polymeric substances (EPS) and microbial community structures in the presence of CuO NPs and HA. The findings suggest that the removal of chemical oxygen demands (COD) and NH-N was moderately influenced by CuO NPs, while HA addition affected EPS production and microbial community structures. The expression of antibiotic resistance genes (ARGs), metal-resistance genes (MRGs), and intI1 was related to the primary compositions of polysaccharides and proteins in EPS and different microbial communities at the genus level.

Key Takeaways:

  • The extracellular polymeric substances (EPS) and microbial community structures were affected by the addition of humic acid (HA) in wastewater treatment containing copper oxide nanoparticles (CuO NPs).
  • The expression of antibiotic resistance genes (ARGs), metal-resistance genes (MRGs), and intI1 was related to the primary compositions of polysaccharides and proteins in EPS and different microbial communities at the genus level.
  • The removal of chemical oxygen demands (COD) and NH-N was moderately influenced by CuO NPs (5 mg/L) stress.
  • The addition of HA (10 mg/L) did not reflect a significant impact on the function of the wastewater treatment process.
  • The research concluded that supplying HA was suggested to reduce the expression of resistance genes in wastewater treatment.
  • The study used sequencing batch bioreactors (SBRs) to analyze the effects of CuO NPs and HA on EPS and microbial community structures.

Statistics:

  • The research was conducted using a concentration of CuO NPs (5 mg/L) in the wastewater treatment system.
  • The addition of HA (10 mg/L) was found to affect EPS production and microbial community structures.
  • The expression of ARGs, MRGs, and intI1 was related to the primary compositions of polysaccharides and proteins in EPS and different microbial communities at the genus level.
  • The removal of COD and NH-N was moderately influenced by CuO NPs (5 mg/L) stress.

Sources:

  • Research publication: Response of extracellular polymeric substances and microbial community structures on resistance genes expression in wastewater treatment containing copper oxide nanoparticles and humic acid. Bioresource Technology, 2021;340:125741.
  • Contact information: Jing Wang, Key Laboratory of Marine Environment and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, People's Republic of China.
  • Publisher contact information: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England.