Abstract
A fractional (rational) chemical analytical method is proposed by which the material composition of clay rocks can be quantified and the clay-forming minerals present can be characterised. Subjecting raw clay to this procedure allows for the determination of the chemical composition of its fine-grained fraction, the amount and composition of exchangeable cations, water-soluble salts, carbonates and colloidal minerals, and the amount of amorphous silica and free quartz. A new, effective method is proposed for the qualitative and quantitative evaluation of the amorphous component in clays. This involves extracting colloids by treating the clay fractions with Tamm's reagent, a buffer solution of oxalic acid and ammonium oxalate with a pH of 3.25. Additionally, through calculations based on the results of chemical analyses, the illite content (derived from the content of non-exchangeable potassium oxide) and the chemical composition of the clay residue are determined. This enables the rock-forming clay mineral to be characterised and its structural chemical formula to be determined. This allows prediction of the physico-chemical and technological properties of the clay.
| Original language | English |
|---|---|
| Pages (from-to) | 153-163 |
| Number of pages | 11 |
| Journal | Applied Clay Science |
| Volume | 163 |
| DOIs | |
| Publication status | Published - 1 Oct 2018 |
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Keywords
- Clay
- Clay minerals
- Colloids
- Kaolinite
- Montmorillonite
- Rational chemical analysis
ASJC Scopus subject areas
- Geology
- Geochemistry and Petrology
Cite this
Optimising rational chemical analysis for quantitative determination of the composition of clay in soils. / Vakalova, Tatyana; Pogrebenkov, Valeriy; Vereshagin, Vladimir; Khabas, Tamara; Revva, Inna.
In: Applied Clay Science, Vol. 163, 01.10.2018, p. 153-163.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Optimising rational chemical analysis for quantitative determination of the composition of clay in soils
AU - Vakalova, Tatyana
AU - Pogrebenkov, Valeriy
AU - Vereshagin, Vladimir
AU - Khabas, Tamara
AU - Revva, Inna
PY - 2018/10/1
Y1 - 2018/10/1
N2 - A fractional (rational) chemical analytical method is proposed by which the material composition of clay rocks can be quantified and the clay-forming minerals present can be characterised. Subjecting raw clay to this procedure allows for the determination of the chemical composition of its fine-grained fraction, the amount and composition of exchangeable cations, water-soluble salts, carbonates and colloidal minerals, and the amount of amorphous silica and free quartz. A new, effective method is proposed for the qualitative and quantitative evaluation of the amorphous component in clays. This involves extracting colloids by treating the clay fractions with Tamm's reagent, a buffer solution of oxalic acid and ammonium oxalate with a pH of 3.25. Additionally, through calculations based on the results of chemical analyses, the illite content (derived from the content of non-exchangeable potassium oxide) and the chemical composition of the clay residue are determined. This enables the rock-forming clay mineral to be characterised and its structural chemical formula to be determined. This allows prediction of the physico-chemical and technological properties of the clay.
AB - A fractional (rational) chemical analytical method is proposed by which the material composition of clay rocks can be quantified and the clay-forming minerals present can be characterised. Subjecting raw clay to this procedure allows for the determination of the chemical composition of its fine-grained fraction, the amount and composition of exchangeable cations, water-soluble salts, carbonates and colloidal minerals, and the amount of amorphous silica and free quartz. A new, effective method is proposed for the qualitative and quantitative evaluation of the amorphous component in clays. This involves extracting colloids by treating the clay fractions with Tamm's reagent, a buffer solution of oxalic acid and ammonium oxalate with a pH of 3.25. Additionally, through calculations based on the results of chemical analyses, the illite content (derived from the content of non-exchangeable potassium oxide) and the chemical composition of the clay residue are determined. This enables the rock-forming clay mineral to be characterised and its structural chemical formula to be determined. This allows prediction of the physico-chemical and technological properties of the clay.
KW - Clay
KW - Clay minerals
KW - Colloids
KW - Kaolinite
KW - Montmorillonite
KW - Rational chemical analysis
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UR - http://www.scopus.com/inward/citedby.url?scp=85050148090&partnerID=8YFLogxK
U2 - 10.1016/j.clay.2018.07.014
DO - 10.1016/j.clay.2018.07.014
M3 - Article
VL - 163
SP - 153
EP - 163
JO - Applied Clay Science
JF - Applied Clay Science
SN - 0169-1317
ER -