Sodium-cadmium and sodium-zinc exchangeability in montmorillonite

Weiss, Zdeněk; Klika, Zdeněk; Čapková, Pavla; Janeba, D.; Kozubova, S.

doi:10.1007/s002690050145

Cited by 15 publications

(5 citation statements)

References 7 publications

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“…The newly recorded d 001 spacings of saturated Cd/SAz samples previously treated with HCl [ Table 1, column (b)] do not show any significant differences compared with the d 001 spacing of untreated Cd/SAz. These d 001 spacings also correspond well with those (1.48 nm) previously determined for Cd/SAz samples by Weiss et al (1998). In addition, Cd determined in Cd/SAz samples (q Cd ) recalculated to meq/100 g corresponds well with the CEC determined by the Ba method (144 meq/100 g, see Samples and chemicals section).…”

Section: Stability Of Ca/saz and Mb/saz Samples In Hcl Solutionsupporting

confidence: 87%

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The adsorption of methylene blue on montmorillonite from acid solutions

Klika¹,

Pustková²,

Dudová³

et al. 2011

Clay miner.

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AB ST R ACT : The adsorption of methylene blue (MB) on montmorillonite from acid solutions has not yet been studied in detail. In this paper the adsorption of this dye on Ca/SAz montmorillonite from 0.32, 0.80 and 1.60 M HCl solutions at ambient temperature and after 2 hours leaching was carefully studied and evaluated. Under the above conditions the MB/SAz intercalates formed are practically insoluble. In contrast to the adsorption of methylene blue on montmorillonite from aqueous solutions, the adsorption from acid solutions consists of two adsorption waves. The intercalated samples from the first and second waves were studied using X-ray powder diffraction (XRD), FTIR, Vis spectroscopy, and scanning electron microscopy (SEM) equipped with a microprobe system. The adsorption of MB in the first wave is attributed to ion exchange of the dye cationic species (MB + , MB 2 2+ , H-aggregates, MBH 2+ and H + ) for the original interlayer cations of montmorillonite. The percentages of MBH 2+ and H + based on total adsorbed MB were estimated for varying HCl concentrations. The second adsorption wave is linked to the precipitation of MB species on the outer MB/SAz surface.

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Section: Stability Of Ca/saz and Mb/saz Samples In Hcl Solutionsupporting

confidence: 87%

“…Breen & Moronta, 1999;Josefaciuk, 2002;Pálková et al, 2003;Vukovič et al, 2006), as well as the change of d 001 spacings of smectites during the ion exchange reactions between two different cations (e.g. Weiss et al, 1998).…”

Section: Stability Of Ca/saz and Mb/saz Samples In Hcl Solutionmentioning

confidence: 99%

The adsorption of methylene blue on montmorillonite from acid solutions

Klika¹,

Pustková²,

Dudová³

et al. 2011

Clay miner.

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“…In general, two possible locations for sorption are offered by phyllosilicate clay minerals: (1) structural and interlayer sites, and (2) external surfaces of particles [24]. Ziper et al [25] distinguished three types of sites: interlayer, external planar, and edge surfaces.…”

Section: Adsorption Mechanism and Magnetic Treatmentmentioning

confidence: 99%

Copper(II) adsorption on Ca-rectorite, and effect of static magnetic field on the adsorption

Zhang

Xia

et al. 2004

Journal of Colloid and Interface Science

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“…Pb, Cd, Zn), cationic pollutants (e.g. dyes) from various wastes as well as for retention of RE, clay minerals were also used (Torstenfelt et al, 1982;Weiss et al, 1998;Kraus et al, 2006;Bergaya et al, 2006aBergaya et al, , 2006bKlika et al, 2007Klika et al, , 2011Vopálka et al, 2015). Uptake and factors influencing retention of La, Ce, Sm, Gd, Er, and Y on montmorillonite were investigated and it was found that montmorillonite in aqueous dispersion modifies their pH and therefore the precipitation of RE(III) hydroxides begins already at pH 5 (Bruque et al, 1980).…”

Section: Introductionmentioning

confidence: 99%