Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.scitotenv.2019.04.360
Document accepted manuscript
Title (Primary) Environmental risk or benefit? Comprehensive risk assessment of groundwater treated with nano Fe0-based Carbo-Iron®
Author Weil, M.; Mackenzie, K. ORCID logo ; Foit, K.; Kühnel, D.; Busch, W. ORCID logo ; Bundschuh, M.; Schulz, R.; Duis, K.
Source Titel Science of the Total Environment
Year 2019
Volume 677
Page From 156
Page To 166
Language englisch
Keywords Environmental risk assessment; Nanoremediation; Fe0; Groundwater treatment; Chloroethenes

Groundwater is essential for the provision of drinking water in many areas around the world. The performance of the groundwater-bearing aquifer relies on the ecosystem services provided by groundwater-related organisms. Therefore, if remediation of contaminated groundwater is necessary, the remediation method has to be carefully selected to avoid risk-risk trade-offs that might impact these ecosystems. In the present study, the environmental risk of the in situ remediation agent Carbo-Iron was performed. Carbo-Iron® is a composite of zero valent nano-iron and active carbon. Existing ecotoxicity data were complemented by studies with Daphnia magna (Crustacea), Scenedesmus vacuolatus (Algae), Chironomus riparius (Insecta) and nitrifying soil microorganisms. The predicted no effect concentration of 0.1 mg/L was derived from acute and chronic ecotoxicity studies. It was compared to measured and modelled environmental concentrations of Carbo-Iron applied in a groundwater contaminated with chlorohydrocarbons in a field study and risk ratios were derived. A comprehensive assessment approach was developed further based on existing strategies and used to identify changes of the environmental risk due to the remediation of the contaminated site with Carbo-Iron. With the data used in the present study, the total environmental risk decreased by approximately 50% in the heavily contaminated zones after the application of Carbo-Iron. Thus, based on the results of the present study, the benefit of remediation with Carbo-Iron seems to outweigh its negative effects on the environment.

Persistent UFZ Identifier
Weil, M., Mackenzie, K., Foit, K., Kühnel, D., Busch, W., Bundschuh, M., Schulz, R., Duis, K. (2019):
Environmental risk or benefit? Comprehensive risk assessment of groundwater treated with nano Fe0-based Carbo-Iron®
Sci. Total Environ. 677 , 156 - 166 10.1016/j.scitotenv.2019.04.360