Bentonites


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Bentonites

 

colloidal clays that consist primarily of minerals of the montmorillonite group—Al2[Si4O10](OH)2 nH20. The formation of bentonites results from the chemical alteration of volcanic rock (tuffs and ashes), apparently under conditions of the sea floor. Bentonites are widely used in the petroleum industry for the production of boring solutions, as bleaching clays, and as cementing material in foundry molding sands and ceramic bodies. The largest bentonite deposits in the USSR are found in Turkmenia and Georgia; the largest deposits abroad are in the USA, Mexico, Italy, and Rumania.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
The typical SB cutoff walls are constructed by first excavating a trench with 0.6 to 1.5 m in width while simultaneously filling the trench with bentonite-water slurry (typically 6-12% by dry weight of conventional bentonite) to maintain the trench stability.
Hydraulic Conductivity of Polymer-Amended Sand-Bentonite Backfills Permeated with Lead Nitrate Solutions
The purposes of this present work are activation of Jordanian bentonite with hydrochloric acid and characterizing its physical and chemical properties.
Activation of Jordanian Bentonite by Hydrochloric Acid and Its Potential for Olive Mill Wastewater Enhanced Treatment
Water is favourable for the saturation of bentonite, whereas gas has the opposite effect.
A Numerical Investigation on the Effect of Gas Pressure on the Water Saturation of Compacted Bentonite-Sand Samples
The use of bentonites as feed additives for all animal species has been proposed.
Growth performance, meat quality, and carcass characteristics in growing and fattening Hanwoo steers fed bentonite/Desempenho, qualidade da carne e caracteristicas de carcaca em novilhos Hanwoo em crescimento e engorda alimentados com bentonita
This study shows that modified Nkaliki bentonite could be used for wastewater treatment.
Sorption Performance of Activated Nkaliki Clay in Removing Chromium (VI) Ion from Aqueous Solution: Kinetics, Isotherm, and Thermodynamic Studies
Such substances were applied as adsorbents: AG-5 absorbite, valley peat, and also natural sodium and calcium bentonite clays.
Determination of the adsorbent specific surface area at tar removing from industrial waste water of ammonium sulphate production
In this work, bentonite from Nkalagu was modified by thermal activation, acid activation and combined acid and thermal activation.
Adsorption performance of modified Nkalagu bentonite in dye removal: kinetics, equilibrium, thermodynamics and structural properties of the modified samples
The chemical composition of the two targeted bentonites differs significantly.
Internal stratification of two thick ordovician bentonites of estonia: deciphering primary magmatic, sedimentary, environmental and diagenetic signatures/Kahe paksu Ordoviitsiumi bentoniidi sisemine stratifikatsioon: magmaliste, setteliste, keskkonna ja diageneetiliste tunnuste desifreerimine
Several researchers have evaluated the feasibility of using wheat straw ash (WSA) and bentonite in normal concrete [9-11].
Experimental investigation on use of wheat straw ash and bentonite in self-compacting cementitious system
Supplementation of broiler chickens diet with sodium bentonite had not any adverse effects on their blood serum biochemical characteristics.
Effects of Dietary Inclusion of Sodium Bentonite on Biochemical Characteristics of Blood Serum in Broiler Chickens
The deposits of the Calcium Bentonite are the most common among all the types.
Calcium Bentonite Powder
Quik-Gel: Easy-to-mix, finely ground, premium-grade, high-yielding Wyoming sodium bentonite. Imparts viscosity, fluid loss control and gelling characteristics to freshwater-based fluids.
Drilling fluids guide

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