Microplastic contamination in the highly polluted Tietê River (São Paulo, Brazil): an unsustainable human-nature relationship.

Most domestic and industrial waste, along with plastic litter from São Paulo city, flows into the Tietê River. Microplastics (MPs) from water column and sediment samples of the Tietê River, a marginal lagoon, and Peixe River (tributary) were analyzed to verify microplastic contamination downstream the São Paulo metropolitan region. Water samples were collected after the rainy season (April 2021) and during the dry season (August 2021), with a plankton net.

Co-precipitation of anthocyanin in PHBV by the SEDS technique.

Anthocyanins are pigments of plant origin responsible for most blue, purple and all shades of red found in flowers, fruits and some stems and roots of plants, besides comprising a class of potent antioxidant phenolic compounds. Due to the relevance of anthocyanins this work aims to encapsulate anthocyanin extracted from the wine lees through the Solution Enhanced Dispersion by Supercritical Fluids (SEDS) technique and to evaluate the thermal stability of encapsulated versus non-encapsulated anthocyanin. The highest encapsulation efficiency obtained was approximately 66%.