3,4-Dioxygenated xanthones as antifouling additives for marine coatings: in silico studies, seawater solubility, degradability, leaching, and antifouling performance

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

Vilas Boas, C (Autor) Outra; Silva, ER (Autor) Outra; Resende, D (Autor) Outra; Pereira, B (Autor) Outra; Sousa, G (Autor) Outra; Pinto, M (Autor) Outra; Almeida, JR (Autor) Outra; Marta Correia da Silva (Autor) FFUP; Sousa, E (Autor) Outra

Revista

Título: Environmental Science and Pollution Research

Vol. 30 Nº 5

ISSN: 0944-1344

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-00Y-BT2

DOI: 10.1007/s11356-023-26899-1

Abstract (EN): Marine biofouling pollution is a process that impacts ecosystems and the global economy. On the other hand, traditional antifouling (AF) marine coatings release persistent and toxic biocides that accumulate in sediments and aquatic organisms. To understand the putative impact on marine ecosystems of recently described and patented AF xanthones (xanthones 1 and 2), able to inhibit mussel settlement without acting as biocides, several in silico environmental fate predictions (bioaccumulation, biodegradation, and soil absorption) were calculated in this work. Subsequently, a degradation assay using treated seawater at different temperatures and light exposures was conducted for a period of 2 months to calculate their half-life (DT50). Xanthone 2 was found to be non-persistent (DT50<60 days) at 50 mu M, contrary to xanthone 1 (DT50>60 days). To evaluate the efficacy of both xanthones as AF agents, they were blended into four polymeric-based coating systems: polyurethane- and polydimethylsiloxane (PDMS)-based marine paints, as well as room-temperature-vulcanizing PDMS- and acrylic-based coatings. Despite their low water solubility, xanthones 1 and 2 demonstrated suitable leaching behaviors after 45 days. Overall, the generated xanthone-based coatings were able to decrease the attachment of the Mytilus galloprovincialis larvae after 40 h. This proof-of-concept and environmental impact evaluation will contribute to the search for truly environmental-friendly AF alternatives.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11