| 阳离子表面活性剂对甲苯与水间气-液平衡关系的影响 |
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| 引用本文： | 莫 虹,田森林,李英杰.阳离子表面活性剂对甲苯与水间气-液平衡关系的影响[J].环境科学研究,2009,22(11):1352-1355. |
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| 作者姓名： | 莫 虹 田森林 李英杰 |
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| 作者单位： | 昆明理工大学环境科学与工程学院,云南 昆明 650093 |
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| 基金项目： | 国家自然科学基金项目，云南省教育厅科学研究基金项目，云南省中青年学术带头人后备人才培养经费项目 |
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| 摘 要： | 为探明表面活性剂对水体中挥发性有机物挥发作用的影响，采用顶空气相色谱法并通过改变相比，研究了甲苯与氯代十六烷基吡啶(CPC)溶液间的气-液平衡关系. 结果表明:体系达到平衡后甲苯气相浓度(峰面积)与相比具有良好的线性关系，且二者间的线性关系可通过方程1/ApRf/HiCio+Rf/Cio(Vg/VL)进行拟合并得到亨利系数值.溶液中CPC浓度的变化对甲苯的亨利系数有明显影响，平衡体系的亨利系数值随着CPC浓度的增大而减小；当CPC浓度小于临界胶束浓度(CMC)时，CPC浓度的增加对亨利系数的影响不明显；当CPC浓度在CMC以上时，随着CPC浓度的增加亨利系数减小趋势明显.温度对亨利系数有显著影响，亨利系数随温度的升高而增大，且二者间存在良好的线性关系，并可通过Van’t Hoff方程进行拟合.
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| 关 键 词： | 顶空气相色谱法 气-液平衡 氯化十六烷基吡啶(CPC) 甲苯 |
| 收稿时间： | 2009/4/5 0:00:00 |
| 修稿时间： | 2009/6/17 0:00:00 |
Effect of Cation Surfactant on Vapor-Liquid Equilibrium between Toluene and Water |
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| MO Hong,TIAN Sen-lin and LI Ying-jie.Effect of Cation Surfactant on Vapor-Liquid Equilibrium between Toluene and Water[J].Research of Environmental Sciences,2009,22(11):1352-1355. |
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| Authors: | MO Hong TIAN Sen-lin and LI Ying-jie |
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| Affiliation: | College of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China |
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| Abstract: | In order to investigate the effect of surfactant on evaporation of volatile organic compounds, the headspace-GC technique was utilized to study toluene vapor-liquid equilibrium between toluene and a CPC solution system by changing the vapor-liquid phase ratio. The results showed that the vapor phase concentration of toluene had a good linear relationship to the vapor-liquid phase ratio when the system reached balance. The linear relationship could be simulated though the equation 1/A_p=R_f/H_iC_(io)+R_f/C_(io)(V_g/V_L), and therefore the value of Henry's constant could be obtained. Henry's constant was reduced significantly with the addition of CPC solution concentrations in the balance system. When the CPC concentration lowered its CMC, Henrys constant showed little change with increasing surfactant solution concentration. While the CPC concentration exceeded the CMC, Henry's constant decreased obviously with increasing CPC solution concentration. The influence of temperature on Henry's constant was obvious. When the temperature increased, Henry's constant was enhanced significantly. A good linear relationship could be observed between Henry's constant and temperature, and was fitted well with Van't Hoff equation. |
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| Keywords: | headspace-GC technology vapor-liquid equilibrium CPC toluene |
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