This paper is reporting the data of a preliminary study on heavy metals distribution in fluid and solid phases involved dry classified aluminium hydroxide production through Bayer process. For released phases, main source contamination bauxite its mineralogical soluble or insoluble alkaline solution. It was shown that predominant way to transfer contaminating elements particles occlusion very f...

in this article, we have investigated the role of dimethylamine (dma), tributylamine (tba), triethanoleamine (tea), trishydroxymethylamine (trizma), and hexamethyleneterraamine (hmta), in the formation of zeolitic compounds. the experiments were carried out in acidic and basic media using si/al< 10 and si/a1>10. the structure of the resulting synthetic zeolites were similar to natro davyne, amm...

The study reports petrography, mineralogy and carbonate geochemistry stable isotopy of various types ocelli (silicate-carbonate globules) observed in the lamprophyres from Chadobets Uplift, southwestern Siberian craton. are related to REE-bearing Chuktukon carbonatites. On basis their morphology, relation with surrounding groundmass, we distinguish three ocelli: carbonate-silicate, containing c...

The effect of synthesis parameters on crystallinity, crystal size and morphology hydroxy sodalite particles developed via the pore-plugging hydrothermal (PPH) method is reported in this study. PPH promising developing nanocomposite membrane materials with superior performance to those prepared from other methods. Towards high-quality sodalite/ceramic for CO2 capture method, obtaining high-purit...

A novel activated carbo-aluminosilicate material was prepared from oil shale by chemical activation. The chemicals used in the activation process were 95 wt% sulfuric and 5 wt% nitric acids. The produced material combines the sorption properties and the mechanical strength of both activated carbon and zeolite. An X-ray diffraction analysis shows the formation of zeolite Y, Na-X, and A-types, so...

The crystallizatio n of mic roporous material SAPO-37 was studied under hydrothermal synthesis (HTS) and dry gel conversion (DGC) conditions. The evolution of the intermediate phases as a function of crystallization time was followed by several techniques including PXRD , SEM, AFM, and solid-state NMR. For DGC, SAPO-37 crystallizes from a semi-crysta lline layered precursor containing large por...