You are cordially invited to join .... Kate Szerlag Assistant Professor of Soil and Water Chemistry
Texas A&M University Wednesday, December 11, 13:30 (EST) in "Advances in the use of synchrotron-based radiation for spatially resolved imaging and spectroscopy to speciate phosphorus in soils" this is a Hybrid Meeting In-Person Building 745 (NSLS II) room 156 Register in advance for the virtual meeting: https://bnl.zoomgov.com/meeting/register/vJIscOqvrT8qGMYwDpJEnvj5qyoLTjjiAwo Time conversion Link: https://www.worldtimebuddy.com/<https://urldefense.com/v3/__https:/gcc02.safelinks.protection.outlook.com/?url=https*3A*2F*2Fwww.worldtimebuddy.com*2F&data=05*7C01*7Cgenoa.blankenship*40pnnl.gov*7C67ffe754733240e42d3e08da641ba4bc*7Cd6faa5f90ae240338c0130048a38deeb*7C0*7C0*7C637932367171794987*7CUnknown*7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0*3D*7C3000*7C*7C*7C&sdata=aSe2IUSomjge9ZW6zXdQ81fPzxpg8eawtRkoiOEJdXM*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSU!!P4SdNyxKAPE!Fd5kIAbibocFpkUaEbpqZZGm8tw-xiqb5oC4sfOklv6Kbbf-T3RvUobMSLrzyXNbfNVT9vMxJGuY1RsSqbc6MjpIABre1Q$> Abstract: As an essential plant nutrient, phosphorus (P) is often applied to agricultural fields in the form of animal manure or fertilizer. Excess P may become detrimental to aquatic ecosystems by causing eutrophication. By determining the solid-phase phosphorus (P) species present in high P agricultural soils, we may better understand P solubility and therefore availability to plants and environmental susceptibility to P losses. Although soil P has been extensively researched, direct evidence of the solid phase species is still a growing field due to limitations in direct speciation techniques. This presentation focuses on pairing wet chemical experiments with synchrotron-based, multi-modal techniques to speciate soil P solid phase species. Briefly, high resolution, micro-X-ray fluorescence (m-XRF) mapping followed by P K-edge micro-X-ray absorption near edge structure (µ-XANES) were collected of agricultural soils located on the Delmarva Peninsula (Delaware, USA) with high total P (digest in excess of 800 mg/kg). Using these samples, µ-XRF maps of the same soil thin section and powder mount locations were completed at the National Synchrotron Light Source II (NSLS-II) using beamlines 8-BM and 4-BM. By utilizing the two beamlines, we were able to successfully demonstrate the spatial distribution and co-location of P with Al, Si, S (8-BM), Fe, Ca, and Mn (4-BM) on the soil thin sections and powder mounted samples. Following µ-XRF mapping, we used beamline 8-BM to probe P hotspots using P K-edge µ-XANES to determine P speciation at the micron scale. ================= Vivian Stojanoff, PhD Education, Training, Outreach User Program p 1(631) 344 8375 e lifescie...@bnl.gov<mailto:lifescie...@bnl.gov> w https://www.bnl.gov/ps/lifesciences/<https://www.bnl.gov/ps/lsbr/> Address: Center for Biomolecular Structure National Synchrotron Light Source II Building 745 Brookhaven National Laboratory Upton NY 11973 ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a mailing list hosted by www.jiscmail.ac.uk, terms & conditions are available at https://www.jiscmail.ac.uk/policyandsecurity/
