MgO contained in cementitious materials is experimentally observed to precipitate as poorly crystalline hydrotalcite (Mg-Al LDH). However, the geochemical modelling of challenging due lack consistent thermodynamic dataset for this phase. Hydrotalcites with Mg/Al = 2 were synthesised presence NaHCO3, NaCl, Na2SO4, NaNO3, and NaOH. Mass balance, XRD FT-IR indicated incorporation anions interlayer...

This study analyses how a Mg-Al-Hydrotalcite with carbonate in the interlayer influences hydration of mortar allowing management lead waste (solid or liquid) cement-based material. First, compatibility hydrotalcite cementitious matrix was studied through heat hydration, workability, consistency, compressive strength and mineralogical phase formation. The changes produced by incorporation were n...

Hydrotalcite-supported Pd/Sn catalysts with different Mg/Al atomic ratios (2, 3, 4, and 5) for nitrate adsorption and hydrogenation reduction were successfully synthesized by a coprecipitation method. The results showed that different atomic ratios of Mg/Al resulted in different interlayer spacings and zeta-potentials of the catalysts, which thus influenced its adsorption capacity. With the inc...

In contrast to solid acid catalysts, much fewer efforts have been made to study solid base catalysts. In this thesis, preparation, characterization and application of oxides and modified oxide as solid base catalysts were studied. The catalysts include MgO prepared by different methods, potassium-modified ZrO2, calcined Mg-Al hydrotalcites, and a novel catalyst system Mg(O,F), which was prepare...

Polycyclic aromatic hydrocarbons (PAHs) are considered as priority pollutants because of their high risk to human health. In this paper, we addressed the issue of using hydrotalcite-based nanocomposites as adsorbents of six low molecular weight PAHs (acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene and pyrene) to reduce their negative effects on the environment. A nanocomposite (H...