Removal of antibiotics and antibiotic resistance genes in rural wastewater by an integrated constructed wetland
- 1.4k Downloads
Integrated constructed wetlands (ICWs) are regarded as one of the most important removal technology for pollutants in rural domestic wastewaters. This study investigated the efficiency of an ICW consisting of a regulating pool, four surface and subsurface flow-constructed wetlands, and a stabilization unit for removing antibiotics and antibiotic resistance genes (ARGs) from rural domestic wastewaters. The results showed that antibiotics leucomycin, ofloxacin, lincomycin, and sulfamethazine, and ARGs sul1, sul2, tetM, and tetO were the predominant antibiotics and ARGs in the influent, respectively. The ICW system could significantly reduce most of the detected antibiotics and ARGs with their aqueous removal rates of 78 to 100 % and >99 %, respectively. Based on the measured concentrations, the total pollution loadings of antibiotics were 3,479 μg/day in the influent and 199 μg/day in the final effluent. Therefore, constructed wetlands could be a promising technology for rural wastewater in removing contaminants such as antibiotics and ARGs.
KeywordsAntibiotics Antibiotic resistance genes Integrated constructed wetland Rural domestic wastewater Removal
The authors would like to acknowledge the financial support from the CAS Key Project (KZZD-EW-09), Ministry of Environmental Protection (MEP 201309031), and Natural Science Foundation of China (NSFC U113305 and 41303077).
- APHA (1998) Standard methods for the examination of wastewater, 20th edn. American Public Health Association, Washington DCGoogle Scholar
- Clesceri L, Greenberg A, Eaton A (Eds.) (2001) Standard methods for the examination of water and wastewater (20th ed.), APHA:WashingtonGoogle Scholar
- Coleman BL, Louie M, Salvadori MI, McEwen SA, Neumann N, Sibley K, Irwin RJ, Jamieson FB, Daignault D, Majury A, Braithwaite S, Crago B, McGeer AJ (2013) Contamination of Canadian private drinking water sources with antimicrobial resistant Escherichia coli. Water Res 47:3026–3036CrossRefGoogle Scholar
- Langford K, Lester J (2003) Fate and behavior of endocrine disrupters in wastewater treatment processes. Endocrine disrupters in wastewater and sludge treatment processes:103–143Google Scholar
- Su HC, Ying GG, He LY, Liu YS, Zhang RQ, Tao R (2014) Antibiotic resistance, plasmid-mediated quinolone resistance (PMQR) genes and ampC gene in two typical municipal wastewater treatment plants. Environ Sci Process Impacts [Epub ahead of print]Google Scholar
- Zeng T, Arnold WA (2013) Pesticide photolysis in prairie potholes: probing photosensitized processes. Environ Sci Technol 47:6735–6745Google Scholar
- Zhang HC, Weber EJ (2013) Identifying indicators of reactivity for chemical reductants in sediments. Environ Sci Technol 47:6959–6968Google Scholar
- Zhou LJ, Ying GG, Liu S, Zhao JL, Chen F, Zhang RQ, Peng FQ, Zhang QQ (2012) Simultaneous determination of human and veterinary antibiotics in various environmental matrices by rapid resolution liquid chromatography–electrospray ionization tandem mass spectrometry. J Chromatogr A 1244:123–138CrossRefGoogle Scholar