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Elisabete Silva     Research or Laboratory Scientist 
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Elisabete Silva published an article in February 2019.
Top co-authors
Patrícia Dias De Mendonça Rijo

63 shared publications

Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal

Maria J. Calhorda

4 shared publications

Departamento de Química e Bioquímica, CQB, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, PT-1749-016 Lisboa, Portugal

Olga Regina Ferreira

1 shared publications

Instituto Superior Técnico, DEQ, CERENA, Universidade de Lisboa, Lisboa, Portugal

8
Publications
10
Reads
3
Downloads
9
Citations
Publication Record
Distribution of Articles published per year 
(2008 - 2019)
Total number of journals
published in
 
6
 
Publications See all
Article 0 Reads 0 Citations Eco-friendly non-biocide-release coatings for marine biofouling prevention E.R. Silva, O. Ferreira, P.A. Ramalho, N.F. Azevedo, R. Bayó... Published: 01 February 2019
Science of The Total Environment, doi: 10.1016/j.scitotenv.2018.10.010
DOI See at publisher website
CONFERENCE-ARTICLE 10 Reads 0 Citations <strong>Non-toxic coated structured filters: a non-biocide release strategy for biofouling control</strong> Elisabete Silva, Olga Ferreira Published: 16 November 2017
Proceedings, doi: 10.3390/ecws-2-04950
DOI See at publisher website ABS Show/hide abstract

Authors: Olga Ferreira*, João Gomes, Maria J. Calhorda, Elisabete R. Silva*

Over two-thirds of Earth’s surface is covered by water, and its contamination with invasive aquatic organisms (biofouling on submerged surfaces) is an actual challenge. This bioburden, conventionally treated with the release of toxic agents into the surroundings of the contaminated surfaces, is associated with serious environmental and economic penalties, as well as health risks on several industrial applications (e.g. water purification, desalination units).

In this work, it was developed a new non-toxic alternative able to control this biofouling, by applying a novel immobilisation process (WO2016/093719 A1, 2016) for antifouling agents. Briefly, the immobilisation of biocidal agents (e.g. Econea) was performed by providing new functional biocides (e. g. Econea-NCO) capable of being tethered in polymeric coatings.

Bioactivity assessment of the developed antifouling systems suggested that the biocide properties were not significantly affected by the functionalization process. Econea biocide and its functional counterpart showed similar bioactivity against Staphylococcus. aureus, and similar Minimal Inhibitory Concentration (MIC).

Antifouling assessment of coated polymeric substrates with the most promising coatings (silicone marine based paint) containing the immobilized biocide, was carried out at near static conditions in Atlantic seawater (real field test) and in an artificial seawater aquarium. Auspicious antifouling performances were obtained. The coated substrates remained clean after being immersed in those aquatic environments for more than a year.

Furthermore, an ecotoxicity study of biocidal coatings following standards included in the EU hazard assessment of substances and European Eco-label was performed. In accordance with the European standards the coatings were classified as not harmful to the environment.

Structured filters supports (e.g. monoliths) were also successful coated with the best biocidal coatings. Uniform polymeric films were obtained, and adhesion tests are on-going. The next step of this work is to develop an experimental method to confirm the effectiveness of the coated supported filter structures against biofouling at simulated operational conditions (e.g. water circuits). This approach is presented as an alternative non-toxic and long-lasting antifouling strategy.

Acknowledgements

Support for this work was provided by FCT through UID/MULTI/00612/2013 and Pest-OE/QUI/UI0612/2013. O. Ferreira and Dr. E. R. Silva are also grateful for the financial support from FCT, PhD Grant PD/BD/128370/2017 and Post-Doc fellowship SFRH/BPD/88135/2012, respectively. The authors also thank the support of HEMPEL A/S and P. Rijo for the work collaboration.

Article 0 Reads 0 Citations New Strategy to Prevent Adhesion of Biofouling to Coatings E. R. Silva, O. Ferreira, J. C. Bordado Published: 01 January 2015
Journal of The Adhesion Society of Japan, doi: 10.11618/adhesion.51.239
DOI See at publisher website
Article 0 Reads 0 Citations Hybrid Fibre-Reinforced Cement Composite Elisabete R. Silva, Humberto E. Ferreira, Jorge F.J. Coelho,... Published: 01 November 2012
Materials Science Forum, doi: 10.4028/www.scientific.net/msf.730-732.343
DOI See at publisher website
Article 0 Reads 6 Citations Catalytic combustion of toluene on Pt zeolite coated cordierite foams Filipa Ribeiro, João M. Silva, Elisabete Silva, M. Fátima Va... Published: 01 November 2011
Catalysis Today, doi: 10.1016/j.cattod.2011.02.007
DOI See at publisher website
Article 0 Reads 0 Citations [Recurrent hypercortisolism after removal of an ACTH secretor pituitary adenoma associated with an adrenal macronodule]. Jacinta Santos, Isabel Paiva, Leonor Gomes, Carla Batista, E... Published: 10 February 2010
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