Two in One: Recycled Cobalt Aluminate as a Pigment and Synergistic Flame-Retardant Agent for Polylactide.

Cobalt aluminate (CoAlO) pigment, synthesized from recycled aluminum obtained from can seals and transformed into the boehmite phase, was combined with ammonium polyphosphate (APP422) to produce an efficient flame-retardant material for polylactide (PLA) while simultaneously imparting coloration to the polymer matrix. The chemical structure of the pigment was investigated using X-ray photoelectron spectroscopy and X-ray diffraction prior to its integration into PLA in combination with ammonium polyphosphate (APP422). Thermal gravimetric analysis highlights the superior effect of the APP422/CoAlO combination that enables obtaining a greater amount of char, presenting improved thermal stability and an enhanced protective effect, as clearly evidenced by Mass Loss Cone test results.

Mixed oxides with corundum-type structure obtained from recycling can seals as paint pigments: color stability.

Green chromium and red iron oxides are technically important pigments due to their high color intensity, good dispersibility in paints, and superior hiding power. We report on the synthesis of colored pigments of mixed oxides with a corundum-type structure. The pigments are obtained via the addition of coloring ions to boehmite from recycled metallic aluminium.

Copper(II) and Cobalt(II) Complexes Based on Abietate Ligands from Resin: Synthesis, Characterization and Their Antibacterial and Antiviral Activity against SARS-CoV-2.

Co-abietate and Cu-abietate complexes were obtained by a low-cost and eco-friendly route. The synthesis process used resin and an aqueous solution of CuSO/CoSO at a mild temperature (80 °C) without organic solvents. The obtained complexes are functional pigments for commercial architectural paints with antipathogenic activity.

Eco-Friendly Polysaccharide-Based Synthesis of Nanostructured MgO: Application in the Removal of Cu in Wastewater.

The present study described three synthesis routes using different natural polysaccharides as low-cost non-toxic fuels and complexing agents for obtaining MgO. Cassava starch, leaves (mainly acemannan) gel, and citric pectin powder were mixed with magnesium nitrate salt and calcined at 750 °C for 2 h. The samples were named according to the polysaccharide: cassava starch (MgO-St), citrus pectin (MgO-CP), and (MgO-Av).

Synthesis and Characterization of Boehmite Particles Obtained from Recycling: Water Disinfection Application.

We report on the synthesis of boehmite aluminum oxide hydroxide particles with lamellar structure (γ-AlO(OH)) obtained from the recycling of metallic can seals, with the addition of silver nanoparticles (Ag-NPs) reduced by extract. X-ray diffractometry (XRD) confirmed the γ-phase, and scanning electron microscopy (SEM) showed the presence of Ag-NPs on the boehmite particle surface, confirming the efficiency of the synthesis to obtain the composite material. The samples were used to treat lake water, according to the Standard Methods for the Examination of Water and Wastewater.