Eu(III) sorption onto various montmorillonites: Experiments and modeling

被引：19

作者：

Verma, Parveen K. ^{[1
,2
]}

Semenkova, Anna S. ^{[3
]}

Krupskaya, Victoria V. ^{[3
,4
]}

Zakusin, Sergey V. ^{[3
,4
]}

Mohapatra, Prasanta K. ^{[1
]}

Romanchuk, Anna Yu. ^{[3
]}

Kalmykov, Stepan N. ^{[3
]}

机构：

[1] Bhabha Atom Res Ctr, Mumbai 400085, Maharashtra, India

[2] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India

[3] Lomonosov Moscow State Univ, Moscow 119991, Russia

[4] Russian Acad Sci, Inst Geol Ore Deposits Petrog Mineral & Geochemis, Moscow 119017, Russia

来源：

APPLIED CLAY SCIENCE | 2019年 / 175卷

基金：

俄罗斯基础研究基金会; 俄罗斯科学基金会;

关键词：

Europium; Sorption; Cation exchange; Clay; Bentonite; Montmorillonite; Smectite; LASER FLUORESCENCE SPECTROSCOPY; CA-MONTMORILLONITE; NA-MONTMORILLONITE; SURFACE COMPLEXES; IONIC-STRENGTH; CLAY-MINERALS; BENTONITE; LANTHANIDES; ADSORPTION; SMECTITE;

D O I：

10.1016/j.clay.2019.03.001

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 sorption of Eu(III) onto montmorillonite samples from different deposits such as those of Kutch (India), 10th Khutor deposit (Russia), and Cortijo de Archidona (Spain) was studied over a wide range of experimental conditions by varying the total Eu concentration, pH, and ionic strength. Various bentonite samples showed quantitative sorption at all pH values at low ionic strengths of the solution because of ion exchange interactions. At a higher ionic strength (1 M NaClO4), the sorption is pH-dependent because of the interaction with edge sorption sites and it differed from sample to sample. The difference in the mechanism of interaction at different ionic strengths was confirmed by time-resolved laser-induced fluorescence. Thermodynamic modeling was performed with all experimental data for montmorillonite samples from different sources to create a generalized model for describing their interaction with Eu(III).

引用

页码：22 / 29

页数：8

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