Ecotoxicity testing and environmental risk assessment of iron nanomaterials for sub-surface remediation - Recommendations from the FP7 project NanoRem

Chemosphere
Rune HjorthErik J Joner

Abstract

Nanoremediation with iron (Fe) nanomaterials opens new doors for treating contaminated soil and groundwater, but is also accompanied by new potential risks as large quantities of engineered nanomaterials are introduced into the environment. In this study, we have assessed the ecotoxicity of four engineered Fe nanomaterials, specifically, Nano-Goethite, Trap-Ox Fe-zeolites, Carbo-Iron(®) and FerMEG12, developed within the European FP7 project NanoRem for sub-surface remediation towards a test battery consisting of eight ecotoxicity tests on bacteria (V. fisheri, E. coli), algae (P. subcapitata, Chlamydomonas sp.), crustaceans (D. magna), worms (E. fetida, L. variegatus) and plants (R. sativus, L. multiflorum). The tested materials are commercially available and include Fe oxide and nanoscale zero valent iron (nZVI), but also hybrid products with Fe loaded into a matrix. All but one material, a ball milled nZVI (FerMEG12), showed no toxicity in the test battery when tested in concentrations up to 100 mg/L, which is the cutoff for hazard labeling in chemicals regulation in Europe. However it should be noted that Fe nanomaterials proved challenging to test adequately due to their turbidity, aggregation and sedimentation behavior in...Continue Reading

Citations

Apr 3, 2020·Environmental Science and Pollution Research International·Marcela I Cáceres-WenzelAdriana C Cochón
Jul 25, 2017·Environmental Science and Pollution Research International·Alena ŠevcůMiroslav Černík
Oct 13, 2017·Scientific Reports·Carlo BiancoRajandrea Sethi
Feb 21, 2018·Biomarkers : Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals·Utkarsh A ReddyMohd Mahboob
Feb 18, 2018·Ecotoxicology and Environmental Safety·Nhung H A NguyenAlena Ševců
Aug 21, 2021·The Science of the Total Environment·Lionel MarconVíctor F Puntes

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