Identification of sources of iron in mineral dust (aerosol) from Western China, Arctic and East Antarctica regions by chemical speciation using X-ray absorption near-edge structure (XANES) spectroscopy

Authors: Zhiheng Du (State Key Laboratory of Cryospheric Sciences) , Cunde Xiao (Beijing Normal University; State Key Laboratory of Cryospheric Sciences) , Augusto Marcelli (INFN-Laboratori Nazionali di Frascati; RICMASS) , Giannantonio Cibin (Diamond Light Source) , Giovanni Baccolo (University of Milano-Bicocca) , Salvatore Macis (University of Rome Tor Vergata) , Wei Xu (Institute of High Energy Physics) , Alessandro Puri (CNR-IOM-OGG) , Valter Maggi (University of Milano-Bicocca) , Shiwei Liu (State Key Laboratory of Cryospheric Sciences) , Yingcai Zhu (Institute of High Energy Physics)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: Aerosols in snow and ice. Markers of environmental pollution and climatic changes: European and Asian perspectives, Rome September 7-8, 2017
Peer Reviewed: No

State: Published (Approved)
Published: September 2017

Abstract: In this study, snow samples were collected from Western China (Laohugou glacier), Arctic (Ice stations, Svalbard and Barrow), and East Antarctica (Zhongshan-Dome A transect), the mineral dust samples were extracted with 0.2 μm filter (Teflon and Polycarbonate). Aerosol samples were collected at three sites (Beijing, Barrow and Indonesia) using the multi-stages MOUDI aerosol sampler (Tish). Sand samples (including loess) from these potential sources were sieved with the diameter of a 73 μm sifter. These samples were determined the iron speciation using synchrotron radiation-based techniques, such as X-ray Absorption Near-Edge Structure (XANES) spectroscopy and microscopic X-ray fluorescence measurements at the European Synchrotron Radiation Facility (ESRF) in France. The preliminary Fe K edge and XRF data results indicate that they are taken as the good indicators tracing the variability of mineralogy on snow, ice and aerosol dust samples with different provenances.

Journal Keywords: Glacier; Desert; snow/ice; Arctic; Antarctica; iron speciation; XANES

Subject Areas: Earth Science, Chemistry, Environment

Facility: ESRF