Impact of iron and manganese nano-metal-oxides on contaminant interaction and fortification potential in agricultural systems – a review
Elizabeth C. Gillispie A D , Stephen E. Taylor A B , Nikolla P. Qafoku A and Michael F. Hochella
+ Author Affiliations
- Author Affiliations
A Subsurface Science and Technology Group, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA.
B Department of Crop and Soil Science, Washington State University, Richland, WA 99354, USA.
C Department of Geoscience, Virginia Tech, Blacksburg, VA 24061, USA.
D Corresponding author. Email: elizabeth.gillispie@pnnl.gov
Elizabeth C. Gillispie is a Post Doctorate Research Associate in the Interfacial Geochemistry Group at Pacific Northwest National Laboratory. Dr Gillispie received her Ph.D. and M.S. degrees in environmental soil chemistry at North Carolina State University (Raleigh, North Carolina, USA), and a B.S. degree in environmental geology at the University of Mary Washington (Fredericksburg, Virginia, USA). Her research focuses on understanding complex geochemical processes controlling the fate and transport of contaminants in the soil-vadose-groundwater continuum, particularly in the presence of iron and manganese oxides, and using that knowledge to develop in-situ remediation strategies. |
Stephen E. Taylor is a Ph.D. candidate at Washington State University, and fellow for the WSU and Pacific Northwest National Laboratory Distinguished Graduate Research Program (DGRP). He received a B.S. degree in microbiology with a minor in chemistry from Brigham Young University, and an M.S. degree in soil science from Washington State University. His current research focuses on the fate of nanomaterials in terrestrial ecosystems, with a focus on nano- to micrometre-sized plastic contaminants. |
Nikolla P. Qafoku is a chief scientist and team lead in the Interfacial Geochemistry Team of the Subsurface Science and Technology Group at Pacific Northwest National Laboratory. He received his B.S. and Doctor of Science degrees in soil fertility and soil chemistry from the Agricultural University of Tirana, Albania. In 1998, he graduated from the University of Georgia with a double degree: M.S. in applied mathematics and computer sciences and Ph.D. in environmental soil chemistry and physics. Nik joined the PNNL team in June of 2000, where he is now Chief Scientist Level V. |
Michael F. Hochella, Jr, is an Earth scientist, and a University Distinguished Professor (Emeritus) at Virginia Tech (Blacksburg, Virginia, USA), as well as a Laboratory Fellow at Pacific Northwest National Laboratory (Richland, Washington, USA) concentrating in the area of nano-bio-geo-environmental science on local, regional and global levels. He founded the Virginia Tech National Center for Earth and Environmental Nanotechnology Infrastructure, known as NanoEarth, funded by the National Science Foundation. He is a former president of both the Geochemical Society and the Mineralogical Society of America, and has served on high-level advisory committees at both the US National Science Foundation and the US Department of Energy. |
Environmental Chemistry 16(6) 377-390 https://doi.org/10.1071/EN19063
Submitted: 18 February 2019 Accepted: 14 June 2019 Published: 23 July 2019
Environmental context. Nanominerals are more reactive than bulk minerals, a property that strongly influences the fate of nutrients and contaminants in soils and plants. This review discusses applications of Fe- and Mn-nano-oxides in agricultural systems and their potential to be used as fertiliser and contaminant adsorbents, while addressing potential phytotoxicity. We discuss areas where significant advances are needed, and provide a framework for future work.
Abstract. Rising population growth and increase global food demand have made meeting the demands of food production and security a major challenge worldwide. Nanotechnology is starting to become a viable remediation strategy of interest in farming. Ultimately, it may be used as a sustainability tool in agricultural systems. In these roles, it could be used to increase the efficiency of techniques such as food monitoring, pathogen control, water treatment and targeted delivery of agrochemicals. In addition to these uses, nanoparticles, particularly nano-metal-oxides (NMOs), have been engineered to act as contaminant scavengers and could be applied to a wide range of systems. Numerous studies have investigated the scavenging ability of NMOs, but few have investigated them in this role in the context of agricultural and food systems. Within these systems, however, research has demonstrated the potential of NMOs to increase crop health and yield but few have studied using NMOs as sources of key micronutrients, such as Fe and Mn. In this review, we address previous research that has used Fe- and Mn-NMOs in agricultural systems, particularly the worldwide crop production of the four major staple foods – rice, wheat, maize and soybeans – highlighting their application as fertilisers and sorbents. Fe- and Mn-NMOs are strong candidates for immobilisation of agricultural contaminants in soils and, because they are naturally ubiquitous, they have the potential to be a cost-effective and sustainable technology compared with other remediation strategies.
Additional keywords: agricultural nanotechnology, nutrient uptake.
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