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牛粪源生物炭对水中甲基紫的吸附动力学和热力学

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尹丽, 邹海燕, 费陶, 肖小雨, 张慧, 何仲视. 牛粪源生物炭对水中甲基紫的吸附动力学和热力学[J]. 环境化学, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
引用本文: 尹丽, 邹海燕, 费陶, 肖小雨, 张慧, 何仲视. 牛粪源生物炭对水中甲基紫的吸附动力学和热力学[J]. 环境化学, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
shu
YIN Li, ZOU Haiyan, FEI Tao, XIAO Xiaoyu, ZHANG Hui, HE Zhongshi. Thermodynamics and kinetics of sorption of methyl violet on cow-manure-derived biochar in an aqueous solution[J]. Environmental Chemistry, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
Citation: YIN Li, ZOU Haiyan, FEI Tao, XIAO Xiaoyu, ZHANG Hui, HE Zhongshi. Thermodynamics and kinetics of sorption of methyl violet on cow-manure-derived biochar in an aqueous solution[J]. Environmental Chemistry, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
shu

牛粪源生物炭对水中甲基紫的吸附动力学和热力学

  • 1.

    井冈山大学生命科学学院, 江西省生态环境与资源重点实验室, 吉安, 343009;

  • 2.

    同济大学环境科学与工程学院, 污染控制与资源化研究国家重点实验室, 上海, 200092;

  • 3.

    上海申丰地质新技术应用研究所有限公司, 上海, 201702;

  • 4.

    广西威尔森环保科技开发有限公司, 南宁, 530022

  • 基金项目:

    国家自然科学基金（41661095），江西省自然科学基金（20151BAB214005，20171BAB203025），江西省教育厅科技项目（GJJ160751）和江西省教育厅落地计划（KJLD14065）资助.

Thermodynamics and kinetics of sorption of methyl violet on cow-manure-derived biochar in an aqueous solution

  • 1.

    Key Laboratory of Ecological Environment and Resource Development of Jiangxi Province, School of Life Sciences, Jinggangshan University, Ji'an, 343009, China;

  • 2.

    State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China;

  • 3.

    Shanghai Shenfeng Instuitute of Geological New Technotechnology Application Limited Campany, Shanghai, 201702, China;

  • 4.

    Guangxi Wellsun Environmental Protection Technology Development Co., Ltd., Nanning, 530022, China

  • Fund Project: Supported by the National Natural Science Foundation of China (41661095), Project of Natural Science Foundation of Jiangxi Province (20151BAB214005, 20171BAB203025), the Educational Commission of Jiangxi Province(GJJ160751) and the Landing Project of the Jiangxi Education Department (KJLD14065).

  • 摘要: 600 ℃缺氧热解制得牛粪源生物炭（CBC），采用SEM、FTIR和XRD等分析手段对生物炭理化性质进行表征，并通过静态平衡吸附法研究了CBC对甲基紫的吸附动力学及热力学过程.结果表明，甲基紫的吸附量随着其初始浓度的增加而增大，初始浓度由10 mg·L-1增加到40 mg·L-1，平衡吸附量由5 mg·g-1提高到30 mg·g-1，吸附过程先快后慢，60 min后吸附达到平衡；甲基紫的吸附量还随溶液pH的增加而增大，随温度的升高而增大；用准一级动力学方程、准二级动力学方程、Langmuir 吸附等温方程、Freundlich吸附等温方程对试验数据进行拟合，结果表明，准二级动力学模型更准确地反映其吸附动力学过程，Freundlich等温方程与实验数据拟合度更好，即甲基紫在CBC上的吸附以化学吸附为主；吸附热力学参数ΔG°S°>0、ΔH°>0，表明甲基紫在CBC上的吸附是自发进行的吸热过程.
    Abstract: Cow-manure-derived-biochar (CBC) was prepared by anoxic pyrolysis at 600℃, and the properties were characterized by SEM, FTIR and XRD, respectively. The adsorption kinetics and thermodynamics of methyl violet (MV) onto CBC were investigated via batch equilibrium method. The results showed that the equilibrium adsorption capicity increased from 5 to 30 mg·g-1 with an increase in the initial MV concentrations from 5 to 30 mg·g-1. The adsorption rate was initially fast followed by a slow phase, and equilibrium was finally established after about 60 min. In addition, the adsorption of MV increased with increased solution pH and temperature. Pseudo-first-order and pseudo-second-order models, Langmuir and Freundlich isotherm models were adopted to investigate the adsorption process. It was found that the adsorption kinetics was more accurately described by the pseudo-second-order model, while the equilibrium isotherm data were well fitted by the Freundlich model, suggesting that the adsorption of MV by CBC was dominated by chemisorption. The calculated thermodynamic parameters ΔG°S°>0,ΔH°>0,indicating that the adsorption process was spontaneous and endothermic.
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  • 收稿日期:  2017-05-17
  • 刊出日期:  2017-12-15
尹丽, 邹海燕, 费陶, 肖小雨, 张慧, 何仲视. 牛粪源生物炭对水中甲基紫的吸附动力学和热力学[J]. 环境化学, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
引用本文: 尹丽, 邹海燕, 费陶, 肖小雨, 张慧, 何仲视. 牛粪源生物炭对水中甲基紫的吸附动力学和热力学[J]. 环境化学, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
shu
YIN Li, ZOU Haiyan, FEI Tao, XIAO Xiaoyu, ZHANG Hui, HE Zhongshi. Thermodynamics and kinetics of sorption of methyl violet on cow-manure-derived biochar in an aqueous solution[J]. Environmental Chemistry, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
Citation: YIN Li, ZOU Haiyan, FEI Tao, XIAO Xiaoyu, ZHANG Hui, HE Zhongshi. Thermodynamics and kinetics of sorption of methyl violet on cow-manure-derived biochar in an aqueous solution[J]. Environmental Chemistry, 2017, 36(12): 2650-2657. doi: 10.7524/j.issn.0254-6108.2017051704
shu

牛粪源生物炭对水中甲基紫的吸附动力学和热力学

  • 1.  井冈山大学生命科学学院, 江西省生态环境与资源重点实验室, 吉安, 343009;
  • 2.  同济大学环境科学与工程学院, 污染控制与资源化研究国家重点实验室, 上海, 200092;
  • 3.  上海申丰地质新技术应用研究所有限公司, 上海, 201702;
  • 4.  广西威尔森环保科技开发有限公司, 南宁, 530022
  • 收稿日期:  2017-05-17
基金项目:

国家自然科学基金（41661095），江西省自然科学基金（20151BAB214005，20171BAB203025），江西省教育厅科技项目（GJJ160751）和江西省教育厅落地计划（KJLD14065）资助.

摘要: 600 ℃缺氧热解制得牛粪源生物炭（CBC），采用SEM、FTIR和XRD等分析手段对生物炭理化性质进行表征，并通过静态平衡吸附法研究了CBC对甲基紫的吸附动力学及热力学过程.结果表明，甲基紫的吸附量随着其初始浓度的增加而增大，初始浓度由10 mg·L-1增加到40 mg·L-1，平衡吸附量由5 mg·g-1提高到30 mg·g-1，吸附过程先快后慢，60 min后吸附达到平衡；甲基紫的吸附量还随溶液pH的增加而增大，随温度的升高而增大；用准一级动力学方程、准二级动力学方程、Langmuir 吸附等温方程、Freundlich吸附等温方程对试验数据进行拟合，结果表明，准二级动力学模型更准确地反映其吸附动力学过程，Freundlich等温方程与实验数据拟合度更好，即甲基紫在CBC上的吸附以化学吸附为主；吸附热力学参数ΔG°S°>0、ΔH°>0，表明甲基紫在CBC上的吸附是自发进行的吸热过程.

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