Natural Zeolite's Adsorption of Levofloxacin in Water and the Effects of Environmental Factors

DU Yuejin; ZENG Lixuan; HUANG Jiaquan; LI Meihui

doi:10.6054/j.jscnun.2020092

Journal of South China Normal University (Natural Science Edition) > 2020 > 52(6): 39-44. > DOI: 10.6054/j.jscnun.2020092

DU Yuejin, ZENG Lixuan, HUANG Jiaquan, LI Meihui. Natural Zeolite's Adsorption of Levofloxacin in Water and the Effects of Environmental Factors[J]. Journal of South China Normal University (Natural Science Edition), 2020, 52(6): 39-44. DOI: 10.6054/j.jscnun.2020092

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Natural Zeolite's Adsorption of Levofloxacin in Water and the Effects of Environmental Factors

Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety//MOE Key Laboratory of Theoretical Chemistry of Environment//School of Environment, South China Normal University, Guangzhou 510006, China

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Received Date: January 20, 2020
Available Online: January 04, 2021

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Abstract

Abstract

Natural zeolites (NZ) were used as an adsorbent to remove levofloxacin (LEV) in water. Through static adsorption experiments combined with the XRD, FTIR, and XRF characterization methods, the structure of NZ, the effect of NZ adsorption on LEV and the adsorption mechanism were discussed. The effects of environmental factors, including humic acid and ammonia nitrogen, on the adsorption effect were studied. The XRD analysis showed that the NZ used was clinoptilolite. When the initial concentration of LEV was 20 mg/L, the NZ reached adsorption saturation. The optimal pH was 6.5. The adsorption process was in accordance with the Langmuir isothermal model and the maximum adsorption capacity is 23.65 mg/g. The adsorption mechanisms were ion exchange and hydrogen bonding. The presence of humic acid and ammonia nitrogen significantly reduced the adsorption capacity of LEV. It is speculated that site competition and electrostatic competition inhibited the adsorption of LEV.
- natural zeolites,
- levofloxacin,
- ion exchange,
- hydrogen bonding,
- ammonia nitrogen

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