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KMnO4存在下利用水热法由牛粪制备水热炭及其吸附Pb(Ⅱ)性能

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赵婷婷, 刘杰, 刘茜茜, 张清芸, 申珂珂, 马子川. KMnO4存在下利用水热法由牛粪制备水热炭及其吸附Pb(Ⅱ)性能[J]. 环境化学, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
引用本文: 赵婷婷, 刘杰, 刘茜茜, 张清芸, 申珂珂, 马子川. KMnO4存在下利用水热法由牛粪制备水热炭及其吸附Pb(Ⅱ)性能[J]. 环境化学, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
shu
ZHAO Tingting, LIU Jie, LIU Xixi, ZHANG Qingyun, SHEN Keke, MA Zichuan. Hydrothermal synthesis of dairy manure hydrochar in the medium of KMnO4 solution and its adsorption properties for Pb(Ⅱ)[J]. Environmental Chemistry, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
Citation: ZHAO Tingting, LIU Jie, LIU Xixi, ZHANG Qingyun, SHEN Keke, MA Zichuan. Hydrothermal synthesis of dairy manure hydrochar in the medium of KMnO4 solution and its adsorption properties for Pb(Ⅱ)[J]. Environmental Chemistry, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
shu

KMnO4存在下利用水热法由牛粪制备水热炭及其吸附Pb(Ⅱ)性能

  • 1.

    河北师范大学化学与材料科学学院, 石家庄, 050024;

  • 2.

    河北师大环境科技有限公司, 石家庄, 050024

  • 基金项目:

    河北省教育厅重点项目（ZD20131005）和大学生创新创业训练计划项目（2025）资助.

Hydrothermal synthesis of dairy manure hydrochar in the medium of KMnO4 solution and its adsorption properties for Pb(Ⅱ)

  • 1.

    College of Chemistry and Material Sciences, Hebei Normal University, Shijiazhuang, 050024, China;

  • 2.

    Hebei Normal University Environmental Technology Co., Ltd., Shijiazhuang, 050024, China

  • Fund Project: Supported by the Key Project of Hebei Province Department of Education (ZD20131005)and the College Students' Innovative Entrepreneurial Training Program(2025).

  • 摘要: 以牛粪为生物质原料，在水溶液和KMnO4溶液中分别制备出牛粪水热炭（HC）和改性牛粪水热炭（MHC），对其灰分、元素组成、形貌、表面基团和织构性质进行了表征，并采用批量吸附实验研究了KMnO4改性对牛粪水热炭吸附Pb（Ⅱ）性能的影响.结果表明，KMnO4改性使牛粪水热炭的灰分和氧含量升高，碳、氢、氮的含量降低，芳香性和极性增强，并使比表面积和孔体积显著提高；在pH=4.0-7.0范围内，MHC对Pb（Ⅱ）的吸附率均高于未改性的水热炭；对Pb（Ⅱ）的吸附过程均遵循准二级动力学模型，KMnO4改性可改善吸附动力学性能；未改性的牛粪水热炭对Pb（Ⅱ）的吸附符合Freundlich等温方程，而MHC的吸附遵循Langmuir等温方程，其饱和吸附量随温度的升高而增大，25℃时其饱和吸附量为82.25 mg·g-1.对MHC吸附过程的ΔGθ、ΔHθ和ΔSθ的计算结果表明，该过程是自发的且固液界面自由度降低的放热过程.
    Abstract: Hydrochar (HC) and modified hydrochar (MHC) derived from dairy manure were synthesized in deionized water and KMnO4 solution respectively. The ash content, element composition, morphology, surface groups and texture properties of the obtained materials were characterized. Batch adsorption experiments were conducted to delineate the effect of KMnO4 modification on the adsorption properties of Pb(Ⅱ) on dairy manure hydrochars. The results indicate that surface area, pore volume, aromaticity, polarity, the ash and oxygen content increased while elemental contents of carbon, hydrogen and nitrogen decreased after KMnO4 modification. The adsorption rate of Pb(Ⅱ) onto KMnO4 modified hydrochar was higher than that onto hydrochar at pH values from 4.0 to 7.0. The adsorption process of Pb(Ⅱ) on both HC and MHC followed pseudo-second order model, and the adsorption dynamics performance was improved with the modification of KMnO4. The adsorption isotherm of Pb(Ⅱ) on HC was well fitted to Freundlich model, while those on MHC was well fitted to Langmuir model. The adsorption capacity increased with temperature, and the maximum adsorption capacity of MHC was 82.25 mg·g-1 at 25℃. The calculation results of ΔGθ、ΔHθ and ΔSθ showed that the adsorption was an exothermic and spontaneous process with reduced degrees of freedom at solid-liquid interface.
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  • 收稿日期:  2016-04-28
  • 刊出日期:  2016-12-15
赵婷婷, 刘杰, 刘茜茜, 张清芸, 申珂珂, 马子川. KMnO4存在下利用水热法由牛粪制备水热炭及其吸附Pb(Ⅱ)性能[J]. 环境化学, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
引用本文: 赵婷婷, 刘杰, 刘茜茜, 张清芸, 申珂珂, 马子川. KMnO4存在下利用水热法由牛粪制备水热炭及其吸附Pb(Ⅱ)性能[J]. 环境化学, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
shu
ZHAO Tingting, LIU Jie, LIU Xixi, ZHANG Qingyun, SHEN Keke, MA Zichuan. Hydrothermal synthesis of dairy manure hydrochar in the medium of KMnO4 solution and its adsorption properties for Pb(Ⅱ)[J]. Environmental Chemistry, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
Citation: ZHAO Tingting, LIU Jie, LIU Xixi, ZHANG Qingyun, SHEN Keke, MA Zichuan. Hydrothermal synthesis of dairy manure hydrochar in the medium of KMnO4 solution and its adsorption properties for Pb(Ⅱ)[J]. Environmental Chemistry, 2016, 35(12): 2535-2542. doi: 10.7524/j.issn.0254-6108.2016.12.2016042801
shu

KMnO4存在下利用水热法由牛粪制备水热炭及其吸附Pb(Ⅱ)性能

  • 1.  河北师范大学化学与材料科学学院, 石家庄, 050024;
  • 2.  河北师大环境科技有限公司, 石家庄, 050024
  • 收稿日期:  2016-04-28
基金项目:

河北省教育厅重点项目（ZD20131005）和大学生创新创业训练计划项目（2025）资助.

摘要: 以牛粪为生物质原料，在水溶液和KMnO4溶液中分别制备出牛粪水热炭（HC）和改性牛粪水热炭（MHC），对其灰分、元素组成、形貌、表面基团和织构性质进行了表征，并采用批量吸附实验研究了KMnO4改性对牛粪水热炭吸附Pb（Ⅱ）性能的影响.结果表明，KMnO4改性使牛粪水热炭的灰分和氧含量升高，碳、氢、氮的含量降低，芳香性和极性增强，并使比表面积和孔体积显著提高；在pH=4.0-7.0范围内，MHC对Pb（Ⅱ）的吸附率均高于未改性的水热炭；对Pb（Ⅱ）的吸附过程均遵循准二级动力学模型，KMnO4改性可改善吸附动力学性能；未改性的牛粪水热炭对Pb（Ⅱ）的吸附符合Freundlich等温方程，而MHC的吸附遵循Langmuir等温方程，其饱和吸附量随温度的升高而增大，25℃时其饱和吸附量为82.25 mg·g-1.对MHC吸附过程的ΔGθ、ΔHθ和ΔSθ的计算结果表明，该过程是自发的且固液界面自由度降低的放热过程.

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