山楂核的热解气化特性及其活性炭的制备与吸附性能研究

马宇辉; 张艺钟; 郭健; 霍汉鑫

doi:10.13205/j.hjgc.202403018

山楂核的热解气化特性及其活性炭的制备与吸附性能研究

doi: 10.13205/j.hjgc.202403018

1. 自然资源部天津海水淡化与综合利用研究所环境功能材料创新团队, 天津 300192;
2. 山东四海水处理科技股份有限公司, 山东潍坊 262500;
3. 生态环境部土壤与农业农村生态环境监管技术中心, 北京 100012

基金项目:

中央级公益性科研院所基本科研业务费专项(R-JBYWF-2021-D04,K-JBYWF-2021-ZT04)

国家自然科学基金项目 (51909292)

详细信息

作者简介:
马宇辉(1987-),男,工学博士,高级工程师,主要研究方向为生物质热解资源化和环境功能材料。mayuhui@isdmu.com.cn

通讯作者:
霍汉鑫(1985-),男,工学博士,正高级工程师,主要研究方向为农村生态环境保护政策和修复技术。huohanxin@126.com

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出版历程
- 收稿日期: 2023-01-16
- 网络出版日期: 2024-05-31

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

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

摘要

摘要: 以山楂核为原料,通过热解炭化-CO₂活化两步法制备颗粒活性炭。基于热重分析-傅里叶红外光谱联用技术(TG-FTIR),研究了山楂核的热解炭化和山楂核炭化物的CO₂气化特性,对山楂核炭化物和活性炭的物理化学性质进行了表征和比较,研究了活性炭对水中洛美沙星的吸附等温线模型,并设计了一种新型悬浮式活性炭吸附袋,模拟了其净化洛美沙星污染水体的应用场景。结果表明:山楂核的主要热解温度区间为230~420 ℃,挥发性热解产物主要为CO₂、乙酸、糠醛、左旋葡萄糖。山楂核炭与CO₂之间的气化反应的起始温度为850 ℃,主要产物为CO。当炭化温度为600 ℃,炭化时间为120 min,活化温度为900 ℃,活化时间为90 min,CO₂流量为200 mL/min,活性炭的比表面积和总孔体积分别达到870 m²/g和0.483 cm³/g。活性炭对洛美沙星吸附过程可用Langmuir模型描述,其最大单分子层吸附量为137 mg/g。在静置条件下,悬浮式活性炭吸附袋可有效去除水中洛美沙星,其吸附动力学符合拟二级动力学模型。
- 山楂核 /
- 活性炭 /
- 热解气化 /
- CO₂活化 /
- 洛美沙星
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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