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短乳杆菌对Cr3+的吸附及动力学和热力学拟合

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代启虎, 李冉, 葛俊苗, 张雯, 李柏林, 欧杰. 短乳杆菌对Cr3+的吸附及动力学和热力学拟合[J]. 环境化学, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
引用本文: 代启虎, 李冉, 葛俊苗, 张雯, 李柏林, 欧杰. 短乳杆菌对Cr3+的吸附及动力学和热力学拟合[J]. 环境化学, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
shu
DAI Qihu, LI Ran, GE Junmiao, ZHANG Wen, LI Bailin, OU Jie. Adsorption and kinetic and thermodynamic fitting of Lactobacillus brevis to Cr3+[J]. Environmental Chemistry, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
Citation: DAI Qihu, LI Ran, GE Junmiao, ZHANG Wen, LI Bailin, OU Jie. Adsorption and kinetic and thermodynamic fitting of Lactobacillus brevis to Cr3+[J]. Environmental Chemistry, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
shu

短乳杆菌对Cr3+的吸附及动力学和热力学拟合

  • 1.

    上海海洋大学食品学院, 上海, 201306;

  • 2.

    上海水产品加工及贮藏工程技术研究中心, 上海, 201306;

  • 3.

    农业部水产品贮藏保鲜质量安全风险评估实验室, 上海, 201306

  • 基金项目:

    国家自然科学基金（31671779）资助.

Adsorption and kinetic and thermodynamic fitting of Lactobacillus brevis to Cr3+

  • 1.

    College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China;

  • 2.

    Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai, 201306, China;

  • 3.

    Laboratory of Quality & Safety Risk Assessment for Aquatic Products Storage and Preservation(Shanghai), Ministry of Agriculture, Shanghai, 201306, China

  • Fund Project: Supported by the National Natural Science Foundation of China (31671779).

  • 摘要: 研究了Lactobacillus brevis对水溶液中Cr（Ⅲ）的吸附作用.考察了初始pH值、接触时间、初始Cr（Ⅲ）浓度、菌体浓度和温度对Cr（Ⅲ）吸附效果的影响.结果表明，在较低的pH、温度和初始Cr（Ⅲ）离子浓度条件下，菌株对Cr（Ⅲ）离子的吸附量较低.在试验条件下，溶液初始pH、温度和初始Cr（Ⅲ）离子浓度的升高，均能提高菌株对Cr（Ⅲ）离子的吸附量.在温度为40℃、pH 6和初始Cr（Ⅲ）离子浓度为200 mg·L-1时，菌株吸附量最大.随菌体浓度升高，单位浓度菌体对Cr（Ⅲ）离子吸附量降低，但总吸附量增大，菌体浓度为6 g·L-1吸附量最大.菌株对Cr（Ⅲ）离子吸附较快，接触时间为1 h就达到平衡.用Langmuir、Freundlich、Redlich-Peterson和Temkin吸附模型进行拟合，相关的回归系数表明，吸附过程拟合Langmuir吸附模型比Freundlich、Redlich-Peterson和Temkin吸附模型好.用Elovich、准一级、准二级动力学拟合，动力学试验数据与Lagergren准二级动力学方程的拟合度最佳.
    Abstract: The biosorption of Cr(Ⅲ) from aqueous solutions by Lactobacillus brevis was studied. The effects of initial pH, contact time, initial Cr(Ⅲ) concentration, bacterial concentration and temperature of biosorption of Cr(Ⅲ) from aqueous solutions were investigated. The results indicate that the adsorption of Cr(Ⅲ) ions was low under low pH, temperature and initial Cr(Ⅲ) ion concentration conditions. Under the experimental conditions, as the initial solution pH, temperature, initial Cr(Ⅲ) ions concentration increased, Cr(Ⅲ) ion adsorption capacity of strains increased. At the temperature of 40℃, pH of 6, initial Cr(Ⅲ) ion concentration of 200 mg·L-1, strain had the maximum adsorption amount. With the increase of bacterial concentration, Cr(Ⅲ) ion adsorption capacity decreased by unit bacterial concentration but the total adsorption capacity increased, with the maximum reached at the concentration of 6 g·L-1. The adsorption of Cr(Ⅲ) ions was very fast and the equilibrium reached at the contact time of 1h. As showed by correlation regression coefficients, that the model with the biosorption process fitted with Langmuir isotherm was better than the one fitted with Freundlich、Redlich-Peterson and Temkin. Fitted with Elovich, pseudo-first-order and pseudo-second-order kinetic, Lagergren pseudo-second order equation gave the best fitting degree to the data of kinetics experiment.
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  • 收稿日期:  2018-04-26
  • 刊出日期:  2019-03-15
代启虎, 李冉, 葛俊苗, 张雯, 李柏林, 欧杰. 短乳杆菌对Cr3+的吸附及动力学和热力学拟合[J]. 环境化学, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
引用本文: 代启虎, 李冉, 葛俊苗, 张雯, 李柏林, 欧杰. 短乳杆菌对Cr3+的吸附及动力学和热力学拟合[J]. 环境化学, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
shu
DAI Qihu, LI Ran, GE Junmiao, ZHANG Wen, LI Bailin, OU Jie. Adsorption and kinetic and thermodynamic fitting of Lactobacillus brevis to Cr3+[J]. Environmental Chemistry, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
Citation: DAI Qihu, LI Ran, GE Junmiao, ZHANG Wen, LI Bailin, OU Jie. Adsorption and kinetic and thermodynamic fitting of Lactobacillus brevis to Cr3+[J]. Environmental Chemistry, 2019, 38(3): 626-634. doi: 10.7524/j.issn.0254-6108.2018042602
shu

短乳杆菌对Cr3+的吸附及动力学和热力学拟合

  • 1.  上海海洋大学食品学院, 上海, 201306;
  • 2.  上海水产品加工及贮藏工程技术研究中心, 上海, 201306;
  • 3.  农业部水产品贮藏保鲜质量安全风险评估实验室, 上海, 201306
  • 收稿日期:  2018-04-26
基金项目:

国家自然科学基金（31671779）资助.

摘要: 研究了Lactobacillus brevis对水溶液中Cr（Ⅲ）的吸附作用.考察了初始pH值、接触时间、初始Cr（Ⅲ）浓度、菌体浓度和温度对Cr（Ⅲ）吸附效果的影响.结果表明，在较低的pH、温度和初始Cr（Ⅲ）离子浓度条件下，菌株对Cr（Ⅲ）离子的吸附量较低.在试验条件下，溶液初始pH、温度和初始Cr（Ⅲ）离子浓度的升高，均能提高菌株对Cr（Ⅲ）离子的吸附量.在温度为40℃、pH 6和初始Cr（Ⅲ）离子浓度为200 mg·L-1时，菌株吸附量最大.随菌体浓度升高，单位浓度菌体对Cr（Ⅲ）离子吸附量降低，但总吸附量增大，菌体浓度为6 g·L-1吸附量最大.菌株对Cr（Ⅲ）离子吸附较快，接触时间为1 h就达到平衡.用Langmuir、Freundlich、Redlich-Peterson和Temkin吸附模型进行拟合，相关的回归系数表明，吸附过程拟合Langmuir吸附模型比Freundlich、Redlich-Peterson和Temkin吸附模型好.用Elovich、准一级、准二级动力学拟合，动力学试验数据与Lagergren准二级动力学方程的拟合度最佳.

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