Lead accumulation on montmorillonite

被引：0

作者：

Nagy, NM ^{[1
]}

Kónya, J ^{[1
]}

Beszeda, M ^{[1
]}

Beszeda, I ^{[1
]}

Kálmán, E ^{[1
]}

Keresztes, Z ^{[1
]}

Papp, K ^{[1
]}

机构：

[1] Univ Debrecen, Fac Nat Sci, Isotope Lab, H-4010 Debrecen, Hungary

来源：

ADSORPTION AND NANOSTRUCTURES | 2002年 / 117卷

关键词：

lead ion; calcium montmorillonite; microparticles; IR spectroscopy; scanning electron microscopy;

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure of lead and calcium-lead montmorillonites was studied by IR spectroscopy and scanning electron microscopy. The IR spectra showed no structural changes of the montmorillonite crystal lattice during calcium-lead cation exchange, only the intensities of hydrate water of the interlayer cation vary and the OH band on the edges disappears. Scanning electron microscopic studies showed that the distribution of lead is fairly even on the major part of the surface, however, there are places where the concentration of lead is higher than the mean surface concentration. The diameter of them is less than I pm. Similar lead enrichments were found on a natural clay sediment of a lake in Hungary. Lead ions adsorb on montmorillonite by cation exchange in the interlayer space and a heterogeneous nucleation on the particle surface followed by crystal growth.

引用

页码：117 / 119

页数：3

共 4 条

[1] ADSORPTION BEHAVIOR OF A CATIONIC SURFACTANT ON MONTMORILLONITE
PEKER, S
YAPAR, S
BESUN, N
[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1995, 104 (2-3) : 249 - 257
[2] RICHARDS LA, 1957, USDA HDB, P60
[3] Equilibrium and spectroscopic studies of lead retention in smectite
Shen, SY
Taylor, RW
Bart, H
Tu, SI
[J]. COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 1999, 30 (19-20) : 2711 - 2730
[4] The use of XAFS to distinguish between inner- and outer-sphere lead adsorption complexes on montmorillonite
Strawn, DG
Sparks, DL
[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1999, 216 (02) : 257 - 269

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