首页|Micro-nano bubbles enhanced immobilized Chlorella vulgaris to remove ofloxacin from groundwater

Micro-nano bubbles enhanced immobilized Chlorella vulgaris to remove ofloxacin from groundwater

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  • NETL
  • NSTL
  • Elsevier
© 2024 Elsevier B。V。The phenomenon of antibiotic pollution has emerged as a significant global environmental concern。 However， there is a lack of technical research on the effective removal of antibiotics based on the characteristics of the groundwater environment。 This paper used micro-nano bubbles (MNBs) enhanced immobilized Chlorella technology to remove ofloxacin (OFLX) from groundwater。 The study discussed the impact of initial antibiotic concentration (5–30 mg/mL)， algae concentration (0。25–4 bead/mL)， aeration time (5–30 min)， and coexisting ions on the antibiotic removal rate and analyzed the removal mechanism by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR)。 The results showed that MNBs increased Chlorella vulgaris biomass by 2。48 times and significantly improved OFLX removal efficiency。 The removal rate of OFLX exhibited a significant positive correlation with the algal concentration and coexisting ions and a significant negative correlation with the aeration time and the initial concentration of antibiotics。 Enhanced immobilization of Chlorella vulgaris by MNBs for OFLX removal may involve -NH， -OH， -C=O， -CH2， and -C-O-C groups。 Degradation (including biodegradation and non-biodegradation) is the primary mechanism of antibiotic removal。 Overall， intensive immobilization of Chlorella by MNBs promises to be a technically feasible method for removing antibiotics from groundwater。

AntibioticsGroundwaterMicro-nano-bubblesMicroalgaeOfloxacinRemoval mechanisms

Jing M.、Zhang J.、Li G.、Zhang D.、Liu F.、Yang S.

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School of Water and Environment Chang’ an University||Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang’ an University||Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources Chang’ an University

School of Water and Environment Chang’ an UniversitySchool of Water and Environment Chang’ an UniversitySchool of Water and Environment Chang’ an University||Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang’ an University||||Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources Chang’ an University||

2025

10.1016/j.jconhyd.2024.104458

Journal of contaminant hydrology

Journal of contaminant hydrology

SCI
ISSN：0169-7722
年,卷(期)：2025.268(Jan.)
  • 66