Alkali-activated materials (AAM) consist of a precursor, which is source aluminosilicates, and an alkali source. The precursors are usually waste from various industries such as fly ash thermal power plants slags the metallurgical industry. Due to increasing use these in cement industry strategies for decommissioning coal-fired plants, alternative raw streams increasingly being explored. One al...

Lithium has limited biological activity and can readily replace aluminium, magnesium iron ions in aluminosilicates, making it a proxy for the inorganic silicate cycle its potential link to carbon cycle. Data from North Pacific Ocean, tropical Indian Southern Ocean Red Sea suggest that salinity normalised dissolved lithium concentrations vary by up 2-3% Indo-Pacific Ocean. The highest were measu...

Despite the widespread use of amorphous aluminosilicates (ASA) in various industrial catalysts, the nature of the interface between silica and alumina and the atomic structure of the catalytically active sites are still subject to debate. Here, by the use of dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS) and density functional theory (DFT) calculations, we show that o...

The acidity and hydrothermal stability of mesoporous aluminosilicates (MesoAS) are relatively low compared to those of zeolites, which limits their potential applications as catalysts in petroleum refining and fine chemicals synthesis.[1±7] Much effort has therefore been undertaken to synthesize a new type of materials, which combines the advantages of both zeolites and mesoporous molecular sie...

Zeolites are aluminosilicates that are used in many applications involving catalysis, separation, and gas storage. Unlike the Si/Al ratio of their framework, the location of the aluminum atoms is not well described. It has proved difficult to establish the local structure surrounding the aluminum sites by diffraction methods, since aluminum and silicon are very close in X-ray scattering power a...

This research explores the influence of fly ash source, alkali concentration and temperature on dissolution kinetics Al Si. The characteristics reaction products solid residue were evaluated with ICP-MS, SEM-EDS, quantitative XRD. It was found that occurs faster a higher yield compared to Si for both types. NaOH had similar effect Al, while influenced more by concentration. simultaneous alumino...