Nanoparticles Toxicity to Marine Organisms—a Nanosized or a Giant Environmental Issue?

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 7036

Special Issue Editors


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Guest Editor
Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
Interests: aquatic toxicology; nanoparticles; mixtures of contaminants; marine fish; bioenergetics; oxidative stress; reprotoxicity; emergent contaminants

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Guest Editor
Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
Interests: aquatic toxicology; physiotoxicology; genotoxic vs. anti-genotoxic processes; oxidative stress; neurosensory toxicity; nanoparticles toxicity; functional foods

Special Issue Information

Dear Colleagues,

Thousands of tons of nanoparticles (NPs) are discharged into the water bodies each year, with marine ecosystems as their final destination. The presence of NPs in these systems represents a pressing need to assess their risks to marine organisms. Still, studies on marine biota are limited, as well as those performed under environmentally relevant conditions (realistic concentrations and uptake via). This scarcity is mainly related with limitations driven by the physicochemical properties of NPs (e.g., aggregation in seawater) that will determine their behaviour and bioavailability. The available information on the toxic potential of NPs to marine organisms, points to a wide range, and sometimes contrasting, sub-lethal effects (e.g., oxidative stress, metabolic impairment, genotoxicty and reprotoxicity), depending on the tested concentrations and exposure pathway. This evidence highlights the need to select a set of highly sensitive endpoints, able to identify sub-lethal effects in a large number of species. These endpoints must represent rapid responses both at sub-organismal and organismal level, including subtle effects, which can translate important molecular and behaviour processes and foresee long-term adverse effects. We are also interested in publishing innovative, cutting edge and extensive research on alternative methodologies that are in complience with the 3Rs principle (Replacement, Reduction and Refinement) for more ethical use of animals in testing. Studies within the environmental range of NPs occurence are preferred. Whithin a nanoecotoxicology framework, this special issue will contribute to estimate the harmful potential of NPs to marine organisms and to recommend strategies to mitigate NP-mediated toxicity towards a scientific-based definition of management policies for marine water resources.

Dr. Cláudia Leopoldina Mieiro
Prof. Dr. Mário Pacheco
Guest Editors

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Keywords

  • nanoparticles
  • realistic concentrations
  • uptake via
  • oxidative stress
  • metabolic impairment
  • neurotoxicty
  • genotoxicty
  • citotoxicity
  • reprotoxicity
  • nanoecotoxicology

Published Papers (2 papers)

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Research

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16 pages, 1538 KiB  
Article
Marine Hazard Assessment of Soluble and Nanostructured Forms of the Booster Biocide DCOIT in Tropical Waters
by Fernando Perina, Cristiane Ottoni, Juliana Santos, Vithória Santos, Mariana Silva, Bruno Campos, Mayana Fontes, Debora Santana, Frederico Maia, Denis Abessa and Roberto Martins
Water 2023, 15(6), 1185; https://doi.org/10.3390/w15061185 - 18 Mar 2023
Cited by 1 | Viewed by 1675
Abstract
The encapsulation of antifouling compounds, such as DCOIT (4,5-Dichloro-2-octylisothiazol-3(2H)-one), in mesoporous silica nanocapsules (SiNC) has recently been demonstrated to be an eco-friendly alternative to decrease biocide toxicity towards marine non-target species. However, the lack of information on the chronic effects of such nanomaterials [...] Read more.
The encapsulation of antifouling compounds, such as DCOIT (4,5-Dichloro-2-octylisothiazol-3(2H)-one), in mesoporous silica nanocapsules (SiNC) has recently been demonstrated to be an eco-friendly alternative to decrease biocide toxicity towards marine non-target species. However, the lack of information on the chronic effects of such nanomaterials on non-target tropical species is critical for a more comprehensive environmental risk assessment. Thus, the present study aimed to assess the chronic toxicity and hazard of the soluble and encapsulated forms of DCOIT on neotropical marine species. Chronic tests were conducted with six ecologically relevant species. No effect concentration (NOEC) values were combined with NOEC values reported for tropical species to assess the hazard using the probabilistic approach to derive each predicted no effect concentration (PNEC). The SiNC-DCOIT was three- to ten-fold less toxic than soluble DCOIT. Probabilistic-based PNECs were set at 0.0001 and 0.0097 µg DCOIT L−1 for the biocide soluble and nanostructured forms, respectively. The immobilization of DCOIT into SiNC led to an 84-fold hazard decrease, confirming that the encapsulation of DCOIT into SiNC is a promising eco-friendly alternative technique, even in a chronic exposure scenario. Therefore, the present study will contribute to better management of the environmental risk of such innovative products in the tropical marine environment. Full article
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Review

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24 pages, 3489 KiB  
Review
Single and Combined Toxicity Effects of Zinc Oxide Nanoparticles: Uptake and Accumulation in Marine Microalgae, Toxicity Mechanisms, and Their Fate in the Marine Environment
by Layla Hazeem
Water 2022, 14(17), 2669; https://doi.org/10.3390/w14172669 - 29 Aug 2022
Cited by 11 | Viewed by 3240
Abstract
Recently, there has been rapid growth in the production of zinc oxide nanoparticles (ZnO-NPs) due to their applications in household and cosmetic products. Over the last decade, considerable research was conducted to reveal the effect of ZnO-NPs on microalgae, which form the base [...] Read more.
Recently, there has been rapid growth in the production of zinc oxide nanoparticles (ZnO-NPs) due to their applications in household and cosmetic products. Over the last decade, considerable research was conducted to reveal the effect of ZnO-NPs on microalgae, which form the base of the aquatic food chain. This review discusses the fate and behavior of ZnO-NPs in the marine environment. Predominately, the toxicity mechanism of ZnO-NPs on marine microalgae could be attributed to three sources: the release of Zn2+ ions; the interaction between ZnO-NPs and algae cells; and the generation of reactive oxygen species (ROS). Most toxicity studies were carried out using single ZnO-NPs under conditions not often observed in natural ecosystems; however, organisms including microalgae are more likely exposed to ZnO-NPs mixed with other types of pollutants. This review highlights the importance of increasing the assessment studies of combined pollutants. Lastly, knowledge, research, gaps, and opportunities for further research in this field are presented. Full article
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