Department of Environmental Sciences

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Seminar Abstracts
Environmental Sciences Seminar Abstract            

  Investigating Mineral-Water Interface at Molecular Level - Spectroscopic Approach
Juyoung Ha
Rutgers University
Environmental Sciences Department

The chemical reactivity and physical properties of mineral-water interfaces influence a number of important geochemical processes such as speciation and partitioning of environmental contaminants, bioavailability of trace metals and metalloids, and transport of colloids in aquatic environments. Reactions at mineral surfaces are of particular importance in controlling contaminant fate and transport in aquatic environments due to the abundance of reactive mineral surface area available for sequestering different types of ionic species including organic compounds, metals, and metalloids. Presence of mineral nanoparticles has been reported in a range of natural environments and, when compared with larger particles of the same material, they have been shown to possess a number of unique and potentially important physical, chemical, and magnetic properties. In this presentation, studies on the environmental impact of iron oxide nanoparticles will be presented focusing on characterizing the mineral-water interface and the surface complex structures of different aqueous species occurring natural environments. Advantages of applying the synchrotron-based techniques such as X-ray absorption spectroscopy and scanning transmission X-ray microscopy in combination with bench-top spectroscopic tools on studying the complex, multi-variable reaction pathways of trace elements and contaminant with mineral surfaces will be presented.

Last updated: 09/04/2011