PREPARATION OF ACTIVATED CARBON FROM HAWTHORN SEED VIA TWO-STEP PYROLYSIS-CO<sub>2</sub> ACTIVATION METHOD FOR ADSORPTION OF LOMEFLOXACIN FROM AQUEOUS SOLUTION

MA Yuhui; ZHANG Yizhong; GUO Jian; HUO Hanxin

doi:10.13205/j.hjgc.202403018

Volume 42 Issue 3

Mar. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(3): 147-155

MA Yuhui, ZHANG Yizhong, GUO Jian, HUO Hanxin. PREPARATION OF ACTIVATED CARBON FROM HAWTHORN SEED VIA TWO-STEP PYROLYSIS-CO2 ACTIVATION METHOD FOR ADSORPTION OF LOMEFLOXACIN FROM AQUEOUS SOLUTION[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 147-155. doi: 10.13205/j.hjgc.202403018

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MA Yuhui, ZHANG Yizhong, GUO Jian, HUO Hanxin. PREPARATION OF ACTIVATED CARBON FROM HAWTHORN SEED VIA TWO-STEP PYROLYSIS-CO₂ ACTIVATION METHOD FOR ADSORPTION OF LOMEFLOXACIN FROM AQUEOUS SOLUTION[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 147-155. doi: 10.13205/j.hjgc.202403018

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PREPARATION OF ACTIVATED CARBON FROM HAWTHORN SEED VIA TWO-STEP PYROLYSIS-CO₂ ACTIVATION METHOD FOR ADSORPTION OF LOMEFLOXACIN FROM AQUEOUS SOLUTION

doi: 10.13205/j.hjgc.202403018

1. Research Team for Environmental Functional Materials, The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources of the People's Republic of China, Tianjin 300192, China;
2. Shandong Sihai Water Treatment High-tech Co., Ltd., Weifang 262500, China;
3. Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment of the People's Republic of China, Beijing 100012, China

Received Date: 2023-01-16
Available Online: 2024-05-31

Abstract

Abstract

Activated carbon was prepared from hawthorn seed via a two-step pyrolysis-CO₂ activation method. Pyrolysis of hawthorn seed and CO₂ gasification of hawthorn seed char was investigated by thermogravimetric analysis coupled with Fourier transform infrared spectroscopy. The activated carbon was characterized by scanning electron microscopy, N₂ adsorption-desorption, X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy. The adsorption behavior of the activated carbon for the removal of lomefloxacin from aqueous solution was investigated. Moreover, a novel adsorption bag was designed based on the activated carbon, and the adsorption bag suspended in water was applied for the removal of lomefloxacin. The results showed that pyrolysis of hawthorn seed mainly occurred between 230 and 420 ℃, leading to the release of CO₂, acetic acid, furfural, and levoglucose. The dominant CO₂ gasification process started at above 850 ℃. The surface area and total pore volume of activated carbon achieved 870 m²/g and 0.483 cm³/g, respectively, under the condition of 600 ℃ for carbonization temperature, 120 min for carbonization time, 900 ℃ for activation temperature, 90 min for activation time, 200 mL/min for CO₂ flow rate. The adsorption isotherm of activated carbon for lomefloxacin followed the Langmuir isotherm model with the maximum monolayer adsorption capacity of 137 mg/g. The suspended adsorption bag effectively removed lomefloxacin from still water, and the adsorption kinetics followed pseudo-second kinetics model.
- hawthorn seed,
- activated carbon,
- pyrolysis,
- CO₂ activation,
- lomefloxacin

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References(29)

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