title: Occurrence and ecological hazard assessment of selected veterinary medicines in livestock wastewater treatment plants.
abstract: The occurrence of some veterinary medicines in the livestock wastewater plants (WWTPs) was investigated. This investigation represented the occurrence of veterinary medicines to treat in the livestock WWTPs or be discharged into the water system in Korea since the sampling sites were widely distributed across the nation and samples were collected from the 11 livestock WWTPs. Nine antibiotics, two analgesics, and two disinfectants occurred in the livestock wastewater plants (WWTPs). From 11 livestock WWTP influents, chlortetracycline, oxytetracycline, acetylsalicylic acid, and disinfectants frequently occurred with the high concentrations. Meanwhile, sulfamethoxazole, erythromycin-H₂O, and trimethoprim did not occur during sampling periods. The values for log Kow of each chemical showed a high correlation with the number of hydrogen bonding acceptors and were important parameters to estimate and understand the biodegradability and toxicity of a compound in the environment. The biodegradability of each compound was proportional to the hydrophilicity of each compound and the toxicity was proportional to the number of hydrogen bonding acceptors of each compound. The expected introductory concentration (EIC), predicted exposure concentration (PEC), and hazard quotient showed that the livestock WWTP effluents were hazardous to ecosystems.
authors: Research Division for Industry & Environment, Korea Atomic Energy Research Institute, Jeollabuk-do, Republic of Korea.
authors: Seung J
authors: SJ
authors: Lim
authors: Cheon-Kyu
authors: CK
authors: Seo
authors: Tak-Hyun
authors: TH
authors: Kim
authors: Seung-Woon
authors: SW
authors: Myung
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis / Q000378:metabolism / Q000633:toxicity; D001673:Biodegradation, Environmental; D004784:Environmental Monitoring; D006860:Hydrogen Bonding; D058751:Livestock; D021281:Quantitative Structure-Activity Relationship; D056910:Republic of Korea; D018570:Risk Assessment; D019155:Veterinary Drugs / Q000032:analysis* / Q000737:chemistry* / Q000378:metabolism / Q000633:toxicity*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000633:toxicity
chemical_list: D000900:Anti-Bacterial Agents; D019155:Veterinary Drugs; D014874:Water Pollutants, Chemical