Determination of the Cation Exchange Capacity (CEC) of Clay Minerals Using the Complexes of Copper(II) Ion with Triethylenetetramine and Tetraethylenepentamine

Meier, Lorenz; Kahr, G.

doi:10.1346/ccmn.1999.0470315

Cited by 486 publications

(208 citation statements)

References 7 publications

(10 reference statements)

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“…The CEC value was estimated about 34 meq/100g (7). This values was lower than the reported values of CECs for pure clay minerals (80-120 meq/100g) (7).…”

Section: Characterization Of M6 Clay and Organoclays Derivativescontrasting

confidence: 69%

“…Per consequent, they are good adsorbents for cationic compounds but not for anionic, and non-ionic or hydrophobic compounds 5,6 . Many studies were focused in surface modification of clay mineral by tailoring hydrophobicity of clay surfaces for target molecules in adsorption process 7 . Replacing the native cations such as Na + , K + and Ca +2 with quaternary ammonium cations will increase like dissolve like interaction during organic contaminant uptake from a solution.…”

Section: Oriental Journal Of Chemistrymentioning

confidence: 99%

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Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Al-Faze¹,

Kooli²

2014

Orient. J. Chem.

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Local clay from Al-Madinah Al-Munawwarah was modified by a solution of cetyltrimethylammonium bromide (C16TMABr) at different initial concentrations. The organoclays were characterized by PXRD, TGA, FTIR and N 2 adsorption isotherms. The ability of these samples to remove the dye eosin is evaluated. The removal properties of organoclays were dependent on the content of C16TMA cations, the initial concentrations of eosin, temperature of the removal process, the mass of the used organoclays. These organoclays exhibited removal percentages in the range of 80 ~100% and removed amounts of 50 ~ 68 mg of eosin/ g. The isotherms were fitted well in Langmuir model.

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“…The CEC value was estimated about 34 meq/100g (7). This values was lower than the reported values of CECs for pure clay minerals (80-120 meq/100g) (7).…”

Section: Characterization Of M6 Clay and Organoclays Derivativescontrasting

confidence: 69%

Section: Oriental Journal Of Chemistrymentioning

confidence: 99%

Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Al-Faze¹,

Kooli²

2014

Orient. J. Chem.

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“…Cation exchange capacity (CEC) was determined by ion exchange with [Cu(trien)] 2+ (Meier & Kahr 1999) using methodology optimized for the analysis of sediments (Grygar et al , 2010Lojka et al 2009). The method is based on determination of the decrease of the concentration of the [Cu(trien)] 2+ ions from solution in contact with 100-900 mg sediment by atomic absorption spectroscopy.…”

Section: Analytical Techniquesmentioning

confidence: 99%

Regional chemostratigraphic key horizons in the macrofossil-barren siliciclastic lower Miocene lacustrine sediments (Most Basin, Eger Graben, Czech Republic)

Grygar¹,

Mach²

2013

Bull. Geosci.

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Six sediment cores from two of four depocentres in the Most Basin, mostly consisting of macrofossil barren fluviodeltaic and lacustrine sediments of Holešice and Libkovice members of the Most Formation (lower Miocene, Burdigalian) were subjected to chemostratigraphic correlation, based on CEC and EDXRF proxy element analyses. CEC-step, prominent K/Al minima and crandallite-bearing horizons in monotonous lacustrine mudstones of the Libkovice Member provide several local isochronous or nearly isochronous key horizons, which we propose for a basin-scale correlation of the upper Most Basin sediment fill. These key horizons prove a spatially uniform sedimentary environment in a single lake (original area~1,000 km 2 ) during deposition of a considerable part of the siliciclastics overlying the main coal seam that tops the lower basin fill. We propose the CEC-step horizon as a novel boundary between Holešice and Libkovice members, i.e. the conversion of previously formal lithostratigraphic units to members with an isochronous boundary. That boundary together with recent sedimentological studies would assign Břešťany clay to the top of the Holešice Member. The upper boundary of the Libkovice Member could be the sediment coarsening related to a lake level decrease before deposition of Lom coal seam. The study will allow progress in palaeogeographic and palaeoenviromental reconstruction of the lower Miocene in the Most Basin. The proxy analyses (CEC vs Al/Si ratios) allow reliable numeric differentiation between kaolinite-rich, smectite-poor and smectite-rich clay assemblages in Holešice and Libkovice members. The plots of CEC vs Al/Si ratios should be applicable for fingerprinting any other monotonous lacustrine clastics with variable mineralogy of the clay assemblage.•

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“…The spectra were deconvoluted with a least-squares computer program assuming Lorentzian line-shapes. Meier & Kahr (1999). 100 mg of samples were added to 50 ml of distilled water and 10 ml solution of [Cu Trien] 2+ .…”

Section: Materials Experimental Setting and Analytical Methodsmentioning

confidence: 99%

“…100 mg of samples were added to 50 ml of distilled water and 10 ml solution of [Cu Trien] 2+ . The suspensions were dispersed by an ultrasonic treatment for 5 minutes, filtrated and the concentration of Cu(II) complex was determined by UV-VIS spectrophotometry (Cary 100, Varian) at 578 nm (Meier & Kahr 1999). The amount of adsorbed [Cu Trien] 2+ was determined using molar absorption coeffi- …”

Section: Materials Experimental Setting and Analytical Methodsmentioning

confidence: 99%

Experimental interactions of Slovak bentonites with metallic iron

Osacký¹,

Honty²,

Madejová³

et al. 2009

Geologica Carpathica

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Abstract:The experimental stability of four bentonites and one K-bentonite from Slovak deposits in the presence of iron was studied to simulate the possible reactions of clays (bentonite barrier) in the contact with Fe containers in a nuclear waste repository. The batch experiments were performed at 60 °C for 30 and 120 days in aerobic conditions. The reaction products were examined by XRD, FTIR, and Mössbauer spectroscopies and CEC (cation exchange capacities) were determined. Reaction solutions were analysed for selected elements using AAS (atomic absorption spectrometry). The results show that bentonites do not interact equally with metallic iron. Bentonites from the Jelšový Potok, Kopernica and Lieskovec deposits reacted similarly whereas the interaction between the bentonite from Lastovce and the iron was less intensive. The lower reactivity of the bentonite from Lastovce can be explained by its low content of smectite. During iron-clay interactions the iron was consumed and Fe oxides (magnetite, lepidocrocite) were formed. Decrease of the smectite diffraction peaks intensity and CEC values during the experiments show rather the rearrangement of the original smectite crystals than dissolution of smectite. In the K-bentonite from the Dolná Ves deposit where the mixed-layer illite-smectite is present instead of smectite, the dissolution of illite-smectite was observed along with the neoformation of smectite. The structure of illite-smectite deteriorated more than the structure of smectites which suggests that this mixed-layer illite-smectite is much less stable in the presence of iron than smectites.

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Determination of the Cation Exchange Capacity (CEC) of Clay Minerals Using the Complexes of Copper(II) Ion with Triethylenetetramine and Tetraethylenepentamine

Cited by 486 publications

References 7 publications

Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Regional chemostratigraphic key horizons in the macrofossil-barren siliciclastic lower Miocene lacustrine sediments (Most Basin, Eger Graben, Czech Republic)

Experimental interactions of Slovak bentonites with metallic iron

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