Effects of a novel anticorrosion engineered nanomaterial on the bivalve Ruditapes philippinarum

abstract

Metallic corrosion is an unsolved problem that has been minimized through the application of specialized coatings containing corrosion inhibitors, such as 2-mercaptobenzothiazole (MBT). Recently, engineered nanomaterials (ENM), such as layered double hydroxides (LDH), have been used to immobilize or encapsulate those compounds promoting their controlled release in a more eco-friendly way. The present study aims to assess the toxicity of a novel anticorrosion nano-based solution (LDH loaded with MBT) and its major compounds separately (MBT and LDH) to the clam Ruditapes philippinarum, during a short-term exposure (96 h). The endpoints were lethality and changes in the physiological and biochemical parameters. MBT induced mortality (LC20 = 78.14 mg L-1) and significant physiological and biochemical changes. Globally, these effects were more severe than those treated with LDH and LDH-MBT that still induced significant biochemical effects. The present study demonstrated the eco-friendly properties of the immobilization process of the corrosion inhibitor in the nanoclays. Effects were observed at higher concentrations than those expected to occur in the environment and therefore these novel nanomaterials can be a promising anticorrosion material with low environmental hazard and risk.

keywords

MUSSEL MYTILUS-GALLOPROVINCIALIS; DOUBLE HYDROXIDE NANOPARTICLES; ACTIVE CORROSION PROTECTION; LAYERED DOUBLE HYDROXIDES; GLUTATHIONE-REDUCTASE; OXIDATIVE STRESS; ACETYLCHOLINESTERASE ACTIVITY; SILVER NANOPARTICLES; GOLD NANOPARTICLES; AQUATIC ORGANISMS

subject category

Chemistry; Environmental Sciences & Ecology; Science & Technology - Other Topics

authors

Martins, R; Oliveira, T; Santos, C; Kuznetsova, A; Ferreira, V; Avelelas, F; Caetano, APF; Tedim, J; Ferreira, M; Freitas, R; Soares, AMVM; Loureiro, S

our authors

acknowledgements

This work received financial support to CESAM (UID/AMB/50017/2013) from FCT/MEC through national funds, and the co-funding by the FEDER (POCI-01-0145-FEDER-00763), within the PT2020 Partnership Agreement and Compete 2020. This work was also developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. R. Martins (SFRH/BPD/93225/2013) and R. Freitas (SFRH/BPD/92258/2013) benefitted from a Post-Doctoral grant and V. Ferreira (PD/BD/52568/2014) and A. Kuznetsova (SFRH/BD/89490/2012) from a PhD grant, all of them awarded by the FCT, funded by the Human Potential Operational Programme (POPH) through QREN and the European Social Fund (ESF) and by national funds through the Portuguese Ministry of Education and Science. C. Santos benefitted from a PhD grant (B/13833/01 - BOF13/DOC/034) funded by the Ghent University Special Research Fund. J. Tedim thanks FCT for Researcher grant (IF/00347/2013). This work was also within the bilateral cooperation FCT/CAPES project FCT/2623/12/3/2013/S. The authors would like to acknowledge the technical support provided by Dr. Abel Ferreira and Dr. Aleksey Lisenkov (SEM measurements).

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