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Ecologically based methods for promoting safer nanosilver for environmental applications.

Arianna Bellingeri1, Mattia Scattoni2, Iole Venditti3

  • 1Department of Physical, Earth and Environmental Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy; Department of Sciences, Roma Tre University of Rome, Via della Vasca Navale 79, 00146 Rome, Italy.

Journal of Hazardous Materials
|July 12, 2022
PubMed
Summary
This summary is machine-generated.

Novel bifunctionalized nanosilver (AgNPcitLcys) shows reduced ecotoxicity on aquatic organisms. Chronic exposure testing is crucial for assessing nanosilver safety in environmental applications.

Keywords:
Acute and chronic ecotoxicityAquatic pollutionEnvironmental safetyFunctionalized nanosilverMicroalgae and microcrustaceans

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Area of Science:

  • Environmental Science
  • Nanotechnology
  • Ecotoxicology

Background:

  • Nanosilver is used in products as a biocide and proposed for water remediation.
  • Nanosilver's ecotoxicity limits its environmental use, necessitating safer formulations and testing.
  • Ecological exposure strategies are needed alongside developing safer nanosilver.

Purpose of the Study:

  • To evaluate the environmental safety of bifunctionalized nanosilver (AgNPcitLcys) as a Hg2+ sensor/sorbent.
  • To assess the behavior and ecotoxicity of AgNPcitLcys on freshwater and marine microalgae and microcrustaceans.
  • To compare acute and chronic exposure effects and investigate the role of silver ion dissolution.

Main Methods:

  • Tested AgNPcitLcys ecotoxicity on microalgae and microcrustaceans under acute and chronic conditions.
  • Investigated silver ion dissolution from AgNPcitLcys.
  • Compared effects across freshwater and marine species and different exposure durations.

Main Results:

  • Acute toxicity tests were insufficient for assessing nanosilver safety.
  • Chronic exposure revealed significant ecotoxicological effects, including lethality.
  • Low silver ion dissolution was observed, suggesting nano-related toxicity.
  • The double coating of AgNPcitLcys mitigated ecotoxicity.

Conclusions:

  • Bifunctionalized nanosilver (AgNPcitLcys) demonstrates reduced ecotoxicity, encouraging safer formulation development.
  • Chronic, ecologically relevant exposure scenarios are vital for accurate nanosilver safety assessment.
  • Further research into safer nanosilver formulations is warranted.