I'm pleased to share a new paper just published in Analytical Chemistry that uses an advanced method of X-ray absorption spectroscopy (HERFD-XANES) of sulfur to probe reduced sulfur speciation in complex environmental mixtures. We document how thiol deprotonation can be exploited to resolve thiols from thioethers and determine thiol pKa, using quantifiable changes in the spectra with pH manipulation. LINK to paper.
In this paper, we discuss the "black box" model of microbial activity in the environment with regards to the biogeochemistry of trace elements. We highlight the limitations of this conceptual model, with a focus on the different variables and processes that can impact microbial activity in the environment. We then highlight microbial transformations of arsenic and mercury as an example of how these processes can influence contaminant biogeochemistry.
We're excited to have Dr. Abagael Pruitt join our team for a Scientist in the Park Fellowship supported by the National Park Foundation. Abagael will be researching the processes unfolding in Arctic rivers due metal mobilization.
PhD Student Ania Szlembarska was awarded an Earth Scholar Award from the UC Davis Institute of the Environment. The award will support research and science communication efforts of her work on the threat of sea level rise on mercury fate in coastal wetlands.
A big congrats to Mark Salazar for his first authored paper in ACS Central Science documenting the risk of metals and metalloids in disposable electronic cigarettes. The study evaluated three of the most popular brands of disposable e-cigarettes and discovered (1) the use of leaded bronze alloys in devices, releasing hazardous levels of lead, copper, and zinc and (2) an unknown source of antimony.
Congratulations to Virginia for being selected for the Achievement Rewards for College Scientists (ARCS) Foundation Scholar Award. The award will support her to stipend, fees, and other research needs as she works towards completing her PhD.
