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
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.
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页码:317 / 326
页数:10
相关论文
共 23 条
[11]   SURFACE ACIDITY OF MONTMORILLONITES [J].
FRENKEL, M .
CLAYS AND CLAY MINERALS, 1974, 22 (5-6) :435-441
[12]  
Gadde R. R., 1974, ANAL CHEM, V46, P2022, DOI 10.1021/ac60349a004
[13]  
GRIMME H, 1968, Zeitschrift fuer Pflanzenernaehrung und Bodenkunde, V121, P58, DOI 10.1002/jpln.19681210108
[14]  
JAMES RO, 1975, DISCUSS FARADAY SOC, V59, P142
[15]  
KINNIBURGH DG, 1976, SOIL SCI SOC AM J, V40, P796, DOI 10.2136/sssaj1976.03615995004000050047x
[16]  
KUNIN R, 1952, ION EXCHANGE RESINS
[17]   DESORPTION OF PHOSPHATE FROM KAOLINITE BY CITRATE AND BICARBONATE [J].
NAGARAJA.S ;
POSNER, AM ;
QUIRK, JP .
SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS, 1968, 32 (04) :507-+
[18]   STUDIES ON THE HYDROLYSIS OF METAL IONS .25. THE HYDROLYSIS OF LEAD(II) IN PERCHLORATE MEDIUM [J].
OLIN, A .
ACTA CHEMICA SCANDINAVICA, 1960, 14 (01) :126-150
[19]   STUDIES ON THE HYDROLYSIS OF METAL IONS .28. APPLICATION OF THE SELF-MEDIUM METHOD TO THE HYDROLYSIS OF LEAD(II) PERCHLORATE SOLUTION [J].
OLIN, A .
ACTA CHEMICA SCANDINAVICA, 1960, 14 (04) :814-822
[20]   THE HYDROLYSIS OF COPPER(II) ION [J].
PERRIN, DD .
JOURNAL OF THE CHEMICAL SOCIETY, 1960, (AUG) :3189-3196