Current knowledge on transport and reactivity of technology-critical elements (TCEs) in soil and aquifer environments
Yasmine Kouhail
A B , Ishai Dror A and Brian Berkowitz A
+ Author Affiliations
- Author Affiliations
A Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel.
B Corresponding author. Email: yasmine.kouhail@weizmann.ac.il
Yasmine Kouhail is a post-doctorate fellow in the Department of Earth and Planetary Sciences at the Weizmann Institute of Science. Her research interests include environmental colloids, speciation and transport of trace metals in surface and subsurface waters and soils. Currently, her research focuses on the fate of technology critical elements in the soil-water environment. |
Ishai Dror is a Senior Research Fellow in the Department of Earth and Planetary Sciences at the Weizmann Institute of Science. His principal research interests focus on environmental chemistry, emerging contaminants, flow and chemical transport in natural geological porous media and soil-aquifer environments and remediation of polluted water. He has published over 60 peer-reviewed papers in leading international hydrology, physics and environmental science journals, and he has co-authored three textbooks with Brian Berkowitz. |
Brian Berkowitz is a Professor in the Department of Earth and Planetary Sciences at the Weizmann Institute of Science. His principal research interests focus on modelling and experimental analysis of fluid flow and chemical transport in natural geological porous media and soil-aquifer environments. He has published over 200 papers in leading international hydrology, physics and environmental science journals, and he has co-authored three textbooks with Ishai Dror. He is active as a journal editor and has received several major awards and recognitions. |
Environmental Chemistry 17(2) 118-132 https://doi.org/10.1071/EN19102
Submitted: 31 March 2019 Accepted: 4 September 2019 Published: 14 October 2019
Environmental context. Technology-critical elements, widely used in modern industry, are found in the environment as a result of both anthropogenic usage and natural sources. This review describes current knowledge on the transport of technology-critical elements in sand, soils and aquifer environments. The chemical compositions of the soils and groundwaters influence the transport of technology-critical elements, and natural colloids increase their mobility.
Abstract. Technology-critical elements (TCEs) are now present in soil and aquifer environments, as a result not only of the geogenic origin but also of the recent anthropogenic activities and release. TCEs can interact with all components of the soil and water, which include inorganic and organic ligands (natural organic matter), clays, mineral surfaces and microorganisms. The literature regarding the transport and fate of TCEs in subsurface porous media (e.g. soil and aquifers) is limited and highly diverse. This review offers a detailed analysis of the existing literature on the transport and fate of TCEs in porous media, and emphasises what is still needed to fully understand their behaviour in the environment. Different modes of TCE transport are presented. First, the mobility of TCEs following interaction with colloids (e.g. natural organic matter, clays) is described. For these cases, an increase in the ionic strength and pH of aqueous solutions shows stronger retention or sorption of TCEs on porous matrices. The transport of nanoparticles (NPs) that contain TCEs is presented as a second mode of mobility. The ionic strength of the solution is the key parameter that controls the transport of cerium nanoparticles in porous media; natural organic matter also increases the mobility of nanoparticles. The third part of this review describes sorption and dissolution processes during transport. Finally, results from the field experiments are reported, which show that rare earth elements and indium are transported in the presence of natural organic matter. We conclude this review with suggested directions for future research.
Additional keywords: column experiments, field transport studies, gallium, indium, platinum, rare earth elements.
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