Biocides effects study of innovative nanomaterials over the fixation of marine bivalve seeds

• Grant number: 19/24945-0
• Support type: Scholarships abroad - Research Internship - Scientific Initiation
• Effective date (Start): January 29, 2020
• Effective date (End): March 18, 2020
• Field of knowledge: Biological Sciences - Ecology - Applied Ecology
• Principal researcher: Denis Moledo de Souza Abessa
• Grantee: Mariana Bruni Marques do Prado e Silva
• Supervisor abroad: Roberto Carlos Domingues Martins
• Home Institution: Instituto de Biociências (IB-CLP). Universidade Estadual Paulista (UNESP). Campus Experimental do Litoral Paulista. São Vicente , SP, Brazil
• Research place: Universidade de Aveiro (UA), Portugal
• Associated to the scholarship: 18/25379-6 - Silver nanoparticles (AgNP) toxicity study over embryo stages of sea urchin Echinometra lucunter, BP.IC

Abstract

Nanomaterials have been widely used, specially the nanoparticles due to their use, including the new technologies about antifouling compounds. Antifouling paints possessing biocides have the purpose of preventing marine biofouling that can increase the costs of marine trsnsportation. There is still few information about the environmental hazard caused by these biocides and how their appliance in large scale cause damage to marine animals. An alternative that can decrease this harm is the encapsulation of the antifouling compounds in nanocapsules that are being developed by the Portuguese company Smallmatek Ltd., aiming to increase the biocides half life over the painted surface and to decrease the quantity of biocides used in the ink composition. The goal of this study is to evaluate the effects of the encapsulated DCOIT in mesoporous silica nanocapsules (SiNC-DCOIT) and impregnated with silver (SiNC-DCOIT-Ag) over the fixation success of oyster Crassostrea gigas seeds, being an international innovative work, because there is no studies realized with these compounds to these organisms yet. The organisms will be exposed in different concentrations of the biocides, besides the control. After 72 hours will be observed the acute effects. In parallel will be done a 21 days experiment to observe the chronical effects; the results will be compared aiming the efficacy of the free and nanoencapsulated biocides. (AU)