Capturing colloidal nano- and microplastics with plant-based nanocellulose networks

Ilona Leppänen, Timo Lappalainen, Tia Lohtander, Christopher Jonkergouw, Suvi Arola (Corresponding Author), Tekla Tammelin (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Microplastics accumulate in various aquatic organisms causing serious health issues, and have raised concerns about human health by entering our food chain. The recovery techniques for the most challenging colloidal fraction are limited, even for analytical purposes. Here we show how a hygroscopic nanocellulose network acts as an ideal capturing material even for the tiniest nanoplastic particles. We reveal that the entrapment of particles from aqueous environment is primarily a result of the network's hygroscopic nature - a feature which is further intensified with the high surface area of nanocellulose. We broaden the understanding of the mechanism for particle capture by investigating the influence of pH and ionic strength on the adsorption behaviour. We determine the nanoplastic binding mechanisms using surface sensitive methods, and interpret the results with the random sequential adsorption (RSA) model. These findings hold potential for the explicit quantification of the colloidal nano- and microplastics from different aqueous environments, and eventually, provide solutions to collect them directly on-site where they are produced.

Original languageEnglish
Article number1814
JournalNature Communications
Volume13
Issue number1
DOIs
Publication statusPublished - 5 Apr 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Adsorption
  • Aquatic Organisms
  • Humans
  • Microplastics
  • Plastics
  • Water Pollutants, Chemical/analysis

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