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梧桐叶活性炭对不同极性酚类物质的吸附

刘 斌 顾 洁 屠扬艳 周建斌

刘 斌, 顾 洁, 屠扬艳, 周建斌. 梧桐叶活性炭对不同极性酚类物质的吸附[J]. 环境科学研究, 2014, 27(1): 92-98.
引用本文: 刘 斌, 顾 洁, 屠扬艳, 周建斌. 梧桐叶活性炭对不同极性酚类物质的吸附[J]. 环境科学研究, 2014, 27(1): 92-98.
LIU Bin, GU Jie, TU Yang-yan, ZHOU Jian-bin. Adsorption Property of Activated Carbon from Leaves of Phoenix Tree on Different Polarity Phenols[J]. Research of Environmental Sciences, 2014, 27(1): 92-98.
Citation: LIU Bin, GU Jie, TU Yang-yan, ZHOU Jian-bin. Adsorption Property of Activated Carbon from Leaves of Phoenix Tree on Different Polarity Phenols[J]. Research of Environmental Sciences, 2014, 27(1): 92-98.

梧桐叶活性炭对不同极性酚类物质的吸附

基金项目: 国家重点基础研究发展计划(973)项目(2010CB732205);国家科技支撑计划项目(2012BAD30BOO);国家林业公益性行业科研专项(201304611)

Adsorption Property of Activated Carbon from Leaves of Phoenix Tree on Different Polarity Phenols

  • 摘要: 以梧桐枯叶为原料、磷酸为活化剂制备活性炭,研究了不同浸渍比、活化温度、活化时间对活性炭孔结构和表面化学性质的影响. 通过XRD(X射线衍射)、BET比表面积、红外图谱、XPS(X射线光电子能谱)等对梧桐叶活性炭进行表征,并对其表面零电荷点(pHpzc)进行了测定,从热力学的角度研究了梧桐叶活性炭对水溶液中不同极性酚类物质的吸附行为. 结果表明,梧桐叶活性炭制备的最佳工艺条件为:浸渍比(质量比)为3∶1,活化温度为450℃,活化时间为2.5h. 浸渍比增大、活化温度升高和活化时间的延长,都有利于增加活性炭表面极性;活性炭的极性表面对酚类物质的吸附有重要影响,梧桐叶活性炭对苯酚、邻硝基苯酚和对硝基苯酚的吸附量分别达到79.2、93.9和95.8mg/g. 热力学研究表明,梧桐叶活性炭对不同极性酚类物质的吸附符合Frenundlich等温吸附方程,并且是一个自发的放热过程,其吸附焓变、吸附熵变、吸附自由能变均小于零.

     

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出版历程
  • 收稿日期:  2013-06-13
  • 修回日期:  2013-09-13
  • 刊出日期:  2014-01-25

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