PH EFFECTS IN THE ADSORPTION OF HEAVY-METAL IONS BY CLAYS

被引：89

作者：

FARRAH, H

PICKERING, WF

机构：

[1] Department of Chemistry, University of Newcastle, Newcastle, NSW

来源：

CHEMICAL GEOLOGY | 1979年 / 25卷 / 04期

关键词：

D O I：

10.1016/0009-2541(79)90063-9

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The amount of hydroxonium or hydroxyl ion sorbed by the sodium form of clays (kaolin, illite or montmorillonite) has been found to increase in proportion with the amount added (i.e., data fits a Boedeker type equation). The adsorptive capacities, and bonding strengths (as evaluated from Langmuir isotherm plots) varied with clay type and nature of the adsorbing species (values for OH- being greater than for H+). The presence of clay suspensions reduced the pH required for total precipitation of heavy metal ions (e.g., Cu, Pb, Cd, Zn), as hydroxy species, and this behaviour has been re-examined in terms of observed pM, pOH relationships and the effect of ligand additions. © 1979.

引用

页码：317 / 326

页数：10

共 23 条

[1]

BENASI HA, 1956, J AM CHEM SOC, V78, P5490

[2]

BENASI HA, 1957, J PHYS CHEM-US, V61, P970

[3] STUDY ON LEAD HYDROXIDE EQUILIBRIUM BY USE OF SELECTIVE ELECTRODES [J].