title: Biological degradation and microbial function effect of norfloxacin in a soil under different conditions.
abstract: This paper investigated the degradation kinetics of norfloxacin in a soil, and its effects on soil respiration and nitrogen transformation under different conditions. Compared to the sterile control, the degradation rates of norfloxacin in the non-sterile soil were greatly enhanced, suggesting that microorganisms played a major role in the degradation. Accelerated degradation for norfloxacin in the soil was observed with decreasing concentrations (30 mg/kg to 5 mg/kg) with its half-life decreasing from 62 days to 31 days. Amending swine manure into the soil and increasing the soil moisture level enhanced the biological degradation of norfloxacin. No obvious inhibition of norfloxacin on soil respiration was observed in the soil, while only slight effect on nitrogen transformation was found. The results suggested that norfloxacin at the reported environmental concentrations (<100 mg/kg) would have little effect on microbial activity and functions in the soils.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.
authors.forename: Ji-Feng
authors.initials: JF
authors.lastname: Yang
authors.forename: Guang-Guo
authors.initials: GG
authors.lastname: Ying
authors.forename: Shan
authors.initials: S
authors.lastname: Liu
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Zhou
authors.forename: Jian-Liang
authors.initials: JL
authors.lastname: Zhao
authors.forename: Ran
authors.initials: R
authors.lastname: Tao
authors.forename: Ping-An
authors.initials: PA
authors.lastname: Peng
mesh_terms: D001419:Bacteria / Q000737:chemistry / Q000378:metabolism*; D001673:Biodegradation, Environmental; D007700:Kinetics; D009643:Norfloxacin / Q000737:chemistry / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D013696:Temperature
chemical_list: D012987:Soil; D009643:Norfloxacin