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氧氟沙星和诺氟沙星在磷酸改性生物炭上的等温吸附行为

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储刚, 赵婧, 刘洋, 吴敏, 周丹丹, 李燕燕. 氧氟沙星和诺氟沙星在磷酸改性生物炭上的等温吸附行为[J]. 环境化学, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
引用本文: 储刚, 赵婧, 刘洋, 吴敏, 周丹丹, 李燕燕. 氧氟沙星和诺氟沙星在磷酸改性生物炭上的等温吸附行为[J]. 环境化学, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
shu
CHU Gang, ZHAO Jing, LIU Yang, WU Min, ZHOU Dandan, LI Yanyan. Sorption of ofloxacin and norfloxacin on modified biochars using phosphoric acid treatment[J]. Environmental Chemistry, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
Citation: CHU Gang, ZHAO Jing, LIU Yang, WU Min, ZHOU Dandan, LI Yanyan. Sorption of ofloxacin and norfloxacin on modified biochars using phosphoric acid treatment[J]. Environmental Chemistry, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
shu

氧氟沙星和诺氟沙星在磷酸改性生物炭上的等温吸附行为

  • 1.

    昆明理工大学环境科学与工程学院, 昆明, 650500

  • 基金项目:

    国家自然科学基金（41473116）和昆明理工大学校级人才培养项目（KKZ3201422028）资助.

Sorption of ofloxacin and norfloxacin on modified biochars using phosphoric acid treatment

  • 1.

    Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China

  • Fund Project: Supported by the National Natural Science Foundation of China (41473116) and Talents Training Program of Kunming University of Science and Technology(KKZ3201422028).

  • 摘要: 本研究考察了不同制备温度下（200℃、350℃、500℃、650℃），磷酸改性前后生物炭的理化性质，及其对氧氟沙星（OFL）和诺氟沙星（NOR）的等温吸附行为.采用N2物理吸附、扫描电镜、热重及元素分析等表征，对离子型抗生素在磷酸改性的生物炭上的等温吸附行为进行了研究.结果表明，随着制备温度的增加，改性生物炭的总孔体积不断增大，孔隙结构广泛形成，比表面积急剧增加.磷酸改性有助于提高生物炭的产率以及保留生物炭的极性官能团.OFL和NOR在改性生物炭上的吸附显著高于原始生物炭，且350℃下制备的改性生物炭具有最大吸附量，其吸附机制归因于吸附剂的大比表面积和孔隙填充作用.由于孔隙的利用率降低和炭的疏水性增强，OFL和NOR在更高温度改性生物炭上的吸附量逐渐降低.因此，在处理以上两种污染物时，350℃可作为磷酸改性生物炭的最佳裂解温度，且有利于减少能耗，节约资源.
    Abstract: Physi-chemical properties of pine sawdust biochars modified by phosphoric acid at various pyrolysis temperatures (200℃, 350℃, 500℃, 650℃), and the sorption of ofloxacin (OFL) and norfloxacin (NOR) on the pristine and modified biochars were investigated. The sorption of ionic antibiotics on the modified biochars was analysed by using N2 adsorption, scanning electron microscopy, thermogravimetry and elemental analysis. The results showed that the total pore volume and specific surface area of the modified biochars increased sharply with increasing pyrolytic temperature, and microscale porous structure was abundant. The phosphoric acid treatment improved the yield and conserved the polar functional groups of biochars. As a result, the sorption of OFL and NOR on the modified biochars was much higher than that on normal biochars. Modified biochars prepared at 350℃ had the highest sorption capacity. The sorption mechanisms of these two antibiotics might be attributed to large specific surface area and pore-filling. The sorption of OFL and NOR on the modified biochars produced at higher temperatures decreased gradually due to the reduction in porosity utilization and increase in the hydrophobicity of the mofified biochars. To deal with these two contaminants, 350℃ can be selected as an optimum pyrolysis temperature for the preparation of modified biochars.
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  • 收稿日期:  2017-09-04
  • 刊出日期:  2018-03-15
储刚, 赵婧, 刘洋, 吴敏, 周丹丹, 李燕燕. 氧氟沙星和诺氟沙星在磷酸改性生物炭上的等温吸附行为[J]. 环境化学, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
引用本文: 储刚, 赵婧, 刘洋, 吴敏, 周丹丹, 李燕燕. 氧氟沙星和诺氟沙星在磷酸改性生物炭上的等温吸附行为[J]. 环境化学, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
shu
CHU Gang, ZHAO Jing, LIU Yang, WU Min, ZHOU Dandan, LI Yanyan. Sorption of ofloxacin and norfloxacin on modified biochars using phosphoric acid treatment[J]. Environmental Chemistry, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
Citation: CHU Gang, ZHAO Jing, LIU Yang, WU Min, ZHOU Dandan, LI Yanyan. Sorption of ofloxacin and norfloxacin on modified biochars using phosphoric acid treatment[J]. Environmental Chemistry, 2018, 37(3): 462-470. doi: 10.7524/j.issn.0254-6108.2017090403
shu

氧氟沙星和诺氟沙星在磷酸改性生物炭上的等温吸附行为

  • 1. 昆明理工大学环境科学与工程学院, 昆明, 650500
  • 收稿日期:  2017-09-04
基金项目:

国家自然科学基金（41473116）和昆明理工大学校级人才培养项目（KKZ3201422028）资助.

摘要: 本研究考察了不同制备温度下（200℃、350℃、500℃、650℃），磷酸改性前后生物炭的理化性质，及其对氧氟沙星（OFL）和诺氟沙星（NOR）的等温吸附行为.采用N2物理吸附、扫描电镜、热重及元素分析等表征，对离子型抗生素在磷酸改性的生物炭上的等温吸附行为进行了研究.结果表明，随着制备温度的增加，改性生物炭的总孔体积不断增大，孔隙结构广泛形成，比表面积急剧增加.磷酸改性有助于提高生物炭的产率以及保留生物炭的极性官能团.OFL和NOR在改性生物炭上的吸附显著高于原始生物炭，且350℃下制备的改性生物炭具有最大吸附量，其吸附机制归因于吸附剂的大比表面积和孔隙填充作用.由于孔隙的利用率降低和炭的疏水性增强，OFL和NOR在更高温度改性生物炭上的吸附量逐渐降低.因此，在处理以上两种污染物时，350℃可作为磷酸改性生物炭的最佳裂解温度，且有利于减少能耗，节约资源.

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