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Silver nanoparticles adsorption by the synthetic and natural adsorbent materials: an exclusive review

Abstract

Silver nanoparticles (AgNPs) have been used in a wide range of industrial products. The release of AgNPs as antimicrobial agent into the river or lake can raise the ecological concern because they have been proven to be associated with toxicity of the aquatic animals. An exclusive review of AgNPs adsorbed by the various synthetic and natural adsorbent materials is important to understand the behaviour of AgNPs in the complex environmental conditions. The transformation of AgNPs into various forms in an aquatic environment depends on the physical, chemical, and biological characteristics of water. Many types of natural materials can be used to fabricate the adsorbents because pore structure, surface area, and active sites of functional groups of the adsorbent can be developed during the carbonisation and activation stages. The mass transfer factor and modified mass transfer factor models would be considered tools that can be used to describe the mechanism and kinetics of AgNPs adsorption onto the natural adsorbents influenced by the electrostatic and van der Waals forces. This exclusive review provides the valuable insights into future challenges of AgNPs adsorption to contribute to sustainable improvement in the management of aquatic ecosystems.

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Acknowledgements

The authors thank the Malaysian Ministry of Higher Education for supporting this study by the Fundamental Research Grant Scheme (FRGS) Vot. No. 4F619, the Universiti Teknologi Malaysia by the Research University Grant (GUP) Vot. No. 18H92, and the Ton Duc Thang University by the Contract No. 551/2019/TĐT-HĐLV-NCV.

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Syafiuddin, A., Fulazzaky, M.A., Salmiati, S. et al. Silver nanoparticles adsorption by the synthetic and natural adsorbent materials: an exclusive review. Nanotechnol. Environ. Eng. 5, 1 (2020). https://doi.org/10.1007/s41204-019-0065-3

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Keywords

  • Adsorption isotherm
  • Adsorption kinetic
  • Interaction mechanism
  • Natural adsorbent material
  • Silver nanoparticles
  • Synthetic adsorbent material