Publisher Summary This chapter reviews acid treatment of smectites that are dominant
minerals in bentonites. Other products include environmentally benign catalysts or their …

The effect of alkali metals on the heavy metals capture by aluminosilicates during the
combustion of solid wastes was not unified. In the experiment of PbCl 2 adsorption by …

Acid activation is a chemical treatment traditionally used on clays, typically bentonites in
hydrochloric or sulphuric acid, to obtain partly dissolved materials with enhanced surface …

This review examines the atmospheric leaching (AL) of nickel laterite ores with sulphuric
acid, specifically the limonite, smectite (clay) and saprolite fractions. The kinetics and …

Four metakaolins were prepared by calcination of a natural Spanish kaolin (Navalacruz
deposit, Zamora province) at 600, 700, 800, and 900° C. These four metakaolins, more …

Acid activation with HCl of two bentonites from the Aegean Islands of Milos and Chios,
Greece, consisting of Chambers and Tatatilla-type and Otay-type montmorillonite …

Seven dioctahedral smectites of various composition and one trioctahedral smectite
(hectorite) were leached in the HCl under different treatment conditions. Hectorite is much …

A palygorskite from Bercimuel (Segovia, Spain) was treated with 1.0, 3.0, 5.0 and 7.0 N
solutions of HCI for 1 hour under reflux. The solids obtained were characterized by XRD, FT …

Bentonite, biotite, illite, kaolin, vermiculite and zeolite were acidified or alkalized with
hydrochloric acid or sodium hydroxide at concentrations of 0.1, 1.0 and 5.0 mole dm− 3 at …

The bulk material of six dioctahedral and two trioctahedral swellable clay minerals was
leached in H2SO4 and HCl at concentrations of 1.0, 5.0 and 10.0 M at 80° C for several …