Results 11 to 20 of about 30,035 (254)
New insights into the dust formation of oxygen-rich AGB stars [PDF]
We observed the AGB stars S Ori, GX Mon and R Cnc with the MIDI instrument at the VLTI. We compared the data to radiative transfer models of the dust shells, where the central stellar intensity profiles were described by dust-free dynamic model ...
Boboltz, D. A. +5 more
core +2 more sources
Speciation of selected trace and major elements in lignite used in "Nikola Tesla A" power plant (Obrenovac, Serbia) [PDF]
Four samples of milled lignite used in the "Nikola Tesla A" power plant located in Obrenovac near Belgrade, were subjected to a five-step sequential extraction, comprising of the following phases: distilled water, 1M ammonium acetate, 0.2M ammonium ...
Popović Aleksandar R. +1 more
doaj +3 more sources
Experimental study of lead (II) removal using polymorphous silica adsorbents [PDF]
Adsorption of lead(II) as a major heavy metal pollutant onto nano-adsorbents of Andalusite, Kyanite and Sillimanite was studied in a batch system.
Saleh Nosrati +2 more
doaj +1 more source
Synthesis of porous silicates [PDF]
The issues of importance and future concern in the synthesis of porous silicates and porous materials that contain a large fraction of silica, e.g. zeolites and other crystalline molecular sieves, are reviewed. The thermodynamics of zeolite synthesis are
Davis, M. E., Helmkamp, M. M.
core +1 more source
This paper reports the synthesis and structural analysis of mesoporous silica materials with the use of aluminum phyllosilicate clay (bentonite) as an alternative silica source.
Malgorzata Zienkiewicz-Strzalka +4 more
doaj +1 more source
Hydrometallurgical extraction of Al and Si from kaolinitic clays [PDF]
Herein is presented the results of a study on the hydrometallurgic extractionand recovery of aluminum and silicon by leaching of kaolinitic clays with HF. Thestudied extraction parameters were: temperature, reaction time, solid/liquid ratio,concentration,
Pinna, Eliana Guadalupe +3 more
core +3 more sources
Using the X-ray diffraction method, the phase content of brown ceramics of lava-like fuel-containing materials of the “New Safe Confinement – Shelter Object” Complex was investigated.
S. V. Gabielkov +6 more
doaj +1 more source
The present review paper focuses on the current state of the art of the alumina-silicate ceramics and surface modifications of ceramics dedicated as fillers in composites with carbon fiber. The use of aluminum-silicates in the form of a cenosphere due to
Nakonieczny Damian S. +2 more
doaj +1 more source
On the plasticity of Si-O framawork of alkali zinc silicates [PDF]
The configuration of the Si-O framework in alkali zinc silicates has been investigated on the basis of recently determined structures. The results have shown that there is a linear correlation between the ionic radii of alkali ions and the molar ...
Kawahara, Akira, Kohara, Shizuo
core +1 more source
A novel technique was developed for the recovery of lithium and aluminum from coal fly ash using a combination of pre-desilication and an intensified acid leaching process. The main components of the high-aluminum fly ash were found to be Al2O3 and SiO2,
Shenyong Li +5 more
doaj +1 more source

