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• 环境科学 • 上一篇    下一篇

自然水体生物膜对苯酚及对硝基苯酚的热力学吸附

郑娜, 董德明, 花修艺, 张立辉, 沈秀娥   

  1. 吉林大学 环境与资源学院, 长春 130012
  • 收稿日期:2006-05-10 修回日期:1900-01-01 出版日期:2007-03-26 发布日期:2007-03-26
  • 通讯作者: 董德明

Characteristics of Thermodynamic Adsorption of Phenol and p Nitrophenol onto Natural Surface Coatings

ZHENG Na, DONG Deming, HUA Xiuyi, ZHANG Lihui, SHEN Xiue   

  1. College of Environment and Resources, Jilin University, Changchun 130012, China
  • Received:2006-05-10 Revised:1900-01-01 Online:2007-03-26 Published:2007-03-26
  • Contact: DONG Deming

摘要: 利用长春南湖水体培养生物膜, 研究自然水体生物膜对苯酚及对硝基苯酚的吸附特性及pH值对生物膜吸附苯酚及对硝基苯酚的影响. 结果表明, Freudlich方程、 Langmuir方程均能较好地描述生物膜对苯酚及对硝基苯酚的吸附. 生物膜吸附苯酚、 对硝基苯酚的过程中表现出对酸、 碱的缓冲能力, 具有两性表面特性. 生物膜对苯酚的吸附在pH=5~9范围内, 随pH值的升高而增加, 生物膜对对硝基苯酚的吸附随pH值的升高而减小. 溶液中pH值的变化, 改变了酚类化合物的存在形态, 从而影响生物膜对酚类的吸附.

关键词: 自然水体生物膜, 苯酚, 对硝基苯酚, pH值, 吸附

Abstract: The adsorption characteristics of phenol and p nitrophenol onto natural surface coatings (biofilms and associated minerals, collected in the Nanhu Lake, Changchun, China) and the effect of pH on phenol and p nitrophenol adsorption onto natural surface coatings were examined. The results show that Freundlich and Langmuir models are all fit in with describing the adsorption behavior of phenol and pnitrophenol on naturalsurfaces coatings. During the adsorption procedure, surface coatings showed amphoteric properties and can buffer the acids or alkalis in the solution. With pH from 5 to 9, the sorption amount of phenol increased with increasing pH, however, the sorption amount of pnitrophenol decreased with increasing pH. The variety of pH in solution could affect the species and adsorption of phenol and pnitrophenol.

Key words: natural surface coatings, phenol, pnitrophenol, pH, adsorption

中图分类号: 

  • X132