物理化学学报 >> 1995, Vol. 11 >> Issue (08): 694-698.doi: 10.3866/PKU.WHXB19950805

研究论文 上一篇    下一篇

微量元素铜与伊利石界面相互作用的离子强度效应

姬泓巍,张正斌,刘莲生,辛惠蓁   

  1. 青岛海洋大学海洋化学研究所|青岛 266003
  • 收稿日期:1994-05-10 修回日期:1994-12-31 发布日期:1995-08-15
  • 通讯作者: 姬泓巍

Ionic Strength Effect on Interfacial Interaction between Copper and Illite

Ji Hong-Wei,Zhang Zheng-Bin,Liu Lian-Sheng,Xin Hui-Zhen   

  1. Institute of Marine Chemistry,Ocean University of Qingdao,Qingdao 266003
  • Received:1994-05-10 Revised:1994-12-31 Published:1995-08-15
  • Contact: Ji Hong-Wei

摘要:

本文测定了在NaClO4和NaCl介质中离子强度对微量元素铜与伊利石相互作用的影响.所得结果为:(1)发现了新的实验现象,即离子强度效应致使交换率E(%)-pH曲线的先右后左摆动现象和离子强度效应导致等温线先下后上移动现象;(2)在NaCl介质中铜的交换率低于在NaClO4介质中的交换率,Cl-有络合效应;(3)各离子强度下的等温线均为等温线分类法中的L-F-4型,介质的离子强度不影响等温线的类型.

关键词: 离子强度, 伊利石, 铜, 吸附

Abstract:

The effect of ionic strength on the exchange ratio E(%)-pH curves and isotherms of copper-illite system in NaClO4 and NaCl media have been studied. Two new phenomena were observed. One was the right-left shift of E(%)-pH curves with increasing ionic strength and the other was the down-up shift of isotherms with increasing ionic strength. Because of the complexation effect of Cl-, the exchange ratio of Cu in NaCl medium was lower than that of Cu in NaClO4 medium. The ionic strength might change the location of isotherms, but it didn’t change their L-F-4 type in isotherm classification. The results have been explained qualitatively and could be applied to ocean geochemistry and were of practical significance for protecting the ocean environment against pollution.

Key words: Ionic strength, Adsorption, Illite, Copper