Abstract The thermal effect of microwave heating was investigated in a NaY aged precursor gel with high dissipation factor. influence power, position, and geometry the cylindrical vessel evaluated on hot spots zeolite formation oven. Higher powers at higher temperatures led to more heterogeneity faster near wall. highest temperature gradient achieved which placed off‐center turntable farthest d...

1 Institute of Earth Sciences ”Jaume Almera“ (CSIC), LLuis Solé i Sabaris, s/n, 08028 Barcelona, Spain; Institute of Coal Chemistry (CSIC), María de Luna, 12, 50015 Zaragoza, Spain; 3 Departamento de Ingeniería Química y Ambiental (ESIS), Camino de los Descubrimientos, s/n. Isla de la Cartuja, 41092 Sevilla, Spain.; 4 KEMA, Section of Environmental Affairs, Utrechtseweg, 310, 6800 ET Arnhem, Th...

Zeolitization of fly-ash by a direct route and a fusion method (two-step process) was studied using an orthogonal array of Taguchi experimental design. The effect of different processing conditions, such as type and concentration of the mineralizing agent, fusion and crystallizing temperatures and times and stirring speed, on the quantity of the zeolitic phase obtained, were evaluated. By means...

-The chemical and the mineralogical composition of a group of pumiceous tufts associated with recent salic volcanic episodes from Tenerife (Canary Islands) have been studied. The investigation focused on the two main types of pyroclastic deposits of the zone: ash-flows and ash-falls. The samples can be classified chemically as trachytic and phonolitic rocks with an intermediate silica content a...

Abstract To develop a new technology to remediate pollution sites stably and effectively, hydrothermal conversion of polluted soil (model soil) into zeolite P for in situ immobilization Heavy Metals (HM) was carried out. Zeolite could be synthesized from hydrothermally with large range Al/Si ratio (0.33–1.0) 48 h at 200 °C. With immobilizing heavy metals (Cr, Zn Cd), the crystallization (Cr-ZP,...

Abstract. This paper focuses on the authigenic mineralization processes acting “Tufo Rosso a Scorie Nere” (TRS), i.e. one of main pyroclastic units Vico stratovolcano (Latium, Italy). The deposits appear in general massive and made “black vitreous vesiculated juvenile scoriae”, immersed an ashy matrix lithified after zeolitization processes. minerals are chabazite phillipsite, zeolitic content ...

The Ethiopian Rift System consists of basins that are in different stages of evolution. Some of the rift-related basins in southwestern Ethiopia are half-grabens that have not evolved to symmetrical rifts since the initiation of rifting here in the middle Miocene. These basins contain fossiliferous Pliocene–Pleistocene volcaniclastic sediments and volcanic rocks and have been occupied by early ...

Classical locality Vyskočilka in the Barrandian Basin displays a well-exposed section of black Silurian shales penetrated by ca. 10-m thick diabase sill. We examined petrographic character and mineral composition intrusive body enclosing shales, as well hydrothermal veins cutting rocks. The is rock with basic affinity (paleobasaltoid), which was strongly influenced post-magmatic alterations inc...