Optimising rational chemical analysis for quantitative determination of the composition of clay in soils

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)153-163
Number of pages11
JournalApplied Clay Science
Volume163
DOIs
Publication statusPublished - 1 Oct 2018

Fingerprint

chemical analysis
Soils
clay
Chemical analysis
soil
Oxalic Acid
Minerals
chemical composition
Rocks
Quartz
Saline water
oxalic acid
Carbonates
Colloids
salt water
mineral
oxalate
colloid
Clay minerals
Silicon Dioxide

Keywords

  • Clay
  • Clay minerals
  • Colloids
  • Kaolinite
  • Montmorillonite
  • Rational chemical analysis

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

Cite this

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title = "Optimising rational chemical analysis for quantitative determination of the composition of clay in soils",
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.",
keywords = "Clay, Clay minerals, Colloids, Kaolinite, Montmorillonite, Rational chemical analysis",
author = "Tatyana Vakalova and Valeriy Pogrebenkov and Vladimir Vereshagin and Tamara Khabas and Inna Revva",
year = "2018",
month = "10",
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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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