Skip to main content

Molecular understanding of nutrient and organic sorption on model mineral surfaces


EMSL Project ID
51428

Abstract

This proposal aims to obtain molecular understanding of the sorption of nitrogen (N) oxyanions and model organic species on model mineral surfaces, and ultimately provide better constraints in modeling the fate of these species in soils and water sources. We aim to: 1) understand the role of crystallographic facet and crystal defects on oxyanion and organic sorption, 2) provide direct evidence for electron transfer to adsorbed species and the molecular configuration of adsorbates, and 3) extend this understanding from model surfaces to estimate the N- and organic capacity for nanoparticles. We will employ a multimodal in situ approach to investigate the sorption of N-oxyanions and organics by infrared spectroscopy, atomic force and electron microscopy, and ambient pressure X-ray photoelectron spectroscopy to elucidate the molecular interactions that occur at the mineral/water interface. Together with modeling, these techniques will elucidate the molecular nature and adsorption geometry of species such as nitrate and model organics on ubiquitous iron (Fe)-containing minerals including hematite and magnetite.

Project Details

Project type
Large-Scale EMSL Research
Start Date
2020-10-01
End Date
2022-09-30
Status
Closed

Team

Principal Investigator

Kelsey Stoerzinger
Institution
Oregon State University

Co-Investigator(s)

Liney Arnadottir
Institution
Oregon State University

Team Members

Hoan Nguyen
Institution
Oregon State University

Binod Paudel
Institution
Pacific Northwest National Laboratory

Nabajit Lahiri
Institution
Pacific Northwest National Laboratory

Yingge Du
Institution
Pacific Northwest National Laboratory