Bentonitic material from South Aswan, Egypt was evaluated in terms of mineral-ogy and chemical composition as bleaching clay in refining of transformer oil before and after acid activation and thermal treatment followed by acid leaching using HCl and H2SO4 for different contact times. Structural modification and refining power of bento-nite were investigated during modification by means of X-ra...

Different compositions of mixtures sand and clay with medium-grade bentonite for molding critical large parts a freight car bogie are examined in the article. to improve bentonite’s physical mechanical properties, such as gas permeability compressive strength addition soda ash, considered. As material study were taken quartz grade 1K2O2025, medium Navbaharskogo birthplace, improving properties ...

Bentonite is a claystone formed by complex mineralogical mixture, composed of montmorillonite, illite, and accessory minerals like quartz, cristobalite, feldspars, carbonates, minor amounts iron oxy-hydroxides. presents complexity at various scales: (1): single mineral may present different chemical composition within the same quarry (e.g., feldspars solid solutions); (2): montmorillonite varia...

A study was conducted to determine the dietary effects of a clay mineral (sodium bentonite, NaB) on manure gas emission, health, production, and meat characteristics of Hanwoo steers. Two diets fed to steers included a control diet (concentrate mix and rice straw) and a treatment diet (control diet+1.0% clay mineral/concentrate mix). Dietary NaB addition considerably reduced concentrations of g...

GMZ bentonite has been selected as a buffer/backfill material for the design of Chinese HLW repository due to its suitable properties. Investigations have been conducted on this material to have a better understanding of its engineering behavior. In this paper, a review of the studies on the chemical effects in GMZ bentonite is presented. The adsorption of radionuclides Ni(II), Cr(III) and Eu(I...

In this study, natural bentonite was used as natural clay material and samples were taken from the Kalecik district in Ankara. In this research, bentonite is the subject of an analysis from standpoint of assessing the basic properties of engineered barriers with respect to the buffer material. Bentonite and sand mixtures were prepared for tests. Some of clay minerals give relatively higher hydr...

The study investigated the basic geomechanical and mineralogical evolution of the bentonite barrier under various experimental boundary conditions which replicated the near-field Thermo-Hydro-Chemico (THC) conditions in a repository. The relationships between the physicochemical alterations and changes in the geotechnical properties have seldom been studied, especially on a consistent dataset. ...

World-wide appreciated strategy for the management and treatment of high level and long lived radioactive waste is to dispose it in a deep and stable geological formation. Microbial community present in the host or buffer material may compromise the effective performance and safety of waste disposal system. In the Czech Republic, bentonite from Černý vrch locality is planned to be used as a buf...

In this study, Cu nanoparticles were immobilized on the surface of natural bentonite using Thymus vulgaris extract as a reducing and stabilizing agent. The natural bentonite-supported copper nanoparticles (Cu NPs/bentonite) were characterized by FTIR spectroscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spe...

Methods for preparing bentonite-gamma globulin complexes and for determining their attachment to cells in tissue culture were investigated by use of human immunoglobulin G (IgG) labeled with 125I. For virus-inhibition studies, bentonite-IgG complexes were prepared by use of human IgG with high specific neutralizing activity against coxsackievirus A21. Much of the antibody in the complex remaine...