Sources, distribution and effects of rare earth elements in the marine environment: Current knowledge and research gaps

Stefania Piarulli*, Bjørn Henrik Hansen, Tomasz Ciesielski, Anna Lena Zocher, Arne Malzahn, Pål A. Olsvik, Christian Sonne, Trond Nordtug, Bjørn Munro Jenssen, Andy M. Booth, Julia Farkas

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

Abstract

Rare earth elements and yttrium (REY) are critical elements for a wide range of applications and consumer products. Their growing extraction and use can potentially lead to REY and anthropogenic-REY chemical complexes (ACC-REY) being released in the marine environment, causing concern regarding their potential effects on organisms and ecosystems. Here, we critically review the scientific knowledge on REY sources (geogenic and anthropogenic), factors affecting REY distribution and transfer in the marine environment, as well as accumulation in- and effects on marine biota. Further, we aim to draw the attention to research gaps that warrant further scientific attention to assess the potential risk posed by anthropogenic REY release. Geochemical processes affecting REY mobilisation from natural sources and factors affecting their distribution and transfer across marine compartments are well established, featuring a high variability dependent on local conditions. There is, however, a research gap with respect to evaluating the environmental distribution and fate of REY from anthropogenic sources, particularly regarding ACC-REY, which can have a high persistence in seawater. In addition, data on organismal uptake, accumulation, organ distribution and effects are scarce and at best fragmentary. Particularly, the effects of ACC-REY at organismal and community levels are, so far, not sufficiently studied. To assess the potential risks caused by anthropogenic REY release there is an urgent need to i) harmonise data reporting to promote comparability across studies and environmental matrices, ii) conduct research on transport, fate and behaviour of ACC-REY vs geogenic REY iii) deepen the knowledge on bioavailability, accumulation and effects of ACC-REY and REY mixtures at organismal and community level, which is essential for risk assessment of anthropogenic REY in marine ecosystems.

Original languageEnglish
Article number118230
JournalEnvironmental Pollution
Volume291
DOIs
Publication statusPublished - Dec 15 2021
Externally publishedYes

Keywords

  • Distribution
  • Ecotoxicity
  • Marine ecosystem
  • REY
  • Risk assessment
  • Transfer

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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