高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (2): 247.

• 研究论文 • 上一篇    下一篇

自然水体生物膜吸附Co,Ni和Cu的特征研究

董德明, 纪亮, 花修艺, 李鱼, 郑娜   

  1. 吉林大学环境与资源学院, 长春 130023
  • 收稿日期:2002-10-22 出版日期:2004-02-24 发布日期:2004-02-24
  • 通讯作者: 董德明(1957年出生),男,博士,教授,博士生导师,主要从事环境污染与控制化学、环境规划与评价及环境污染物形态研究.E-mail;dmdong@mail.jlu.edu.cn E-mail:dmdong@mail.jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号;20077011);国家教育部博士学科点专项基金(批准号;20020183056);“高等学校骨干教师资助计划”(批准号;教技司[2000]65号)资助

Studies on the Characteristics of Co, Ni and Cu Adsorption to Natural Surface Coatings

DONG De-Ming, JI Liang, HUA Xiu-Yi, LI Yu, ZHENG Na   

  1. College of Environment and Resources, Jilin University, Changchun 130023, China
  • Received:2002-10-22 Online:2004-02-24 Published:2004-02-24

PDF (PC)

被引次数

60

摘要： 研究了在自然水体中培养的生物膜吸附Co,Ni和Cu等3种重金属的热力学和动力学特征,并对生物膜吸附各重金属的热力学数据进行了非线性拟合.结果表明,3种重金属的吸附过程均符合Langmuir吸附等温曲线.在溶液中重金属浓度<0.5μmol/L时,生物膜对3种重金属元素的吸附能力顺序是Co>Cu>Ni;在重金属浓度>0.5μmol/L时,顺序是Cu>Co>Ni.对动力学数据进行非线性拟合的结果表明,生物膜对Co,Ni和Cu的吸附均在数小时内达到平衡,吸附过程符合Langmuir等动力学曲线.

关键词: 生物膜, 吸附, Co, Ni, Cu

Abstract: Surface coatings developed in the Nanhu Lake(Changchun) were used to study the characteristics of thermodynamics and kinetics of Co, Ni, and Cu adsorption to them. Statistical analysis of the adsorption data show that the thermodynamic data of each metal fit the Langmuir isotherms. At low ion concentrations(<0.5 μmol/L), the adsorption capacity of these metals to the surface coatings decreased in the order Co, Cu, and Ni, while at high ion concentrations(>0.5 μmol/L), the capacity decreased in the order Cu, Co, and Ni. The kinetic data indicate that the adsorption reached equilibrium in several hours. Four kinetic models, i.e., Elovich equation, double-constant rate equation, first-order kinetics equation and Langmuir kinetics equation, can all be used to describe the adsorption process, especially the Langmuir kinetics equation.

Key words: Surface coating, Adsorption, Co, Ni, Cu

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