The Geochemistry Division of the American Chemical Society is pleased to announce that the eighth Geochemistry Division Medal will be awarded to Dr. Donald L. Sparks for his far-reaching contributions to understanding aqueous and solid-phase speciation of metals and metalloids in the poorly ordered, dynamic materials that comprise the critical zone.
Pictures from the ceremony can be found here or in the Photo Gallery Tab.
In particular, Dr. Sparks pioneered the application of relaxation methods to determining rates of surface complexation reactions; developed and applied state-of-the-art spectroscopic methods to understanding structure and bonding of metals and metalloids at mineral-water interfaces in soils, sediments, and synthetic- and specimen-mineral analogues; elucidated a series of reactions that can occur following surface complexation that lead to incorporation of metal ions into clay minerals; and has made great strides to understanding aqueous and metal-ion speciation in the rhizosphere. In addition to these transformative contributions to the field of geochemistry, his monographs have contributed greatly to transforming the field of soil chemistry and, as an educator and mentor, he has inspired a new generation of soil and environmental geochemists. The medal will be awarded at a special symposium to be held in March 2015 at the 249th National Meeting of the American Chemical Society in Denver, Colorado.
Applications were judged by the following committee members:
Gregory K. Druschel
George R. Luther
R. Lee Penn
We gratefully acknowledge financial support from Elsevier, the Department of Soil and Plant Sciences, University of Delaware, the Delaware Environmental Institute, University of Delaware, and the Division of Geochemistry.
Frank Millero presenting George Luther with the 2013 Geochemistry Medal.
Dave Rickard giving a talk on nucleation kinetics and iron sulfide formation during the Medal Symposium.
Alison Butler giving a talk on bio(geo)inorganic chemistry of marine environments at the Medal Symposium.
Brad Tebo giving a talk on the bioinorganic mechanisms of elemental manganese oxidation during the Medal Symposium.
The 2013 Geochemistry Division Medal was awarded to Dr. George W. Luther III, Professor of Oceanography, University of Delaware, for his wide-ranging fundamental contributions to aqueous geochemistry. These contributions include application of physical inorganic chemistry to understanding electron transfer in natural waters; development of chemical sensors and the application of voltammetry to quantifying trace element speciation in natural waters; and elucidation of chemical and microbial processes in metal and sulfur cycling. After the presentation of the award, Dr. Luther’s contributions were celebrated with a series of invited lectures highlighting critical issues in aqueous biogeochemistry.
The ACS Geochemistry Division Medal was awarded at a special Geochemistry Division awards symposium, which was held at the ACS National Meeting in New Orleans, LA: 7-11 April 2013.
John "Jack" Tossell, Professor Emeritus in the Chemistry & Biochemistry Department at the University of Maryland and currently Research Professor in the Chemistry Department and the Institute for Basic Energy Science and Technology at George Washington University, was the recipient of the 2011 ACS ACS Geochemistry Division Medal.
The award was in recognition of his pioneering work in computational quantum chemistry to understand and predict the structure, bonding, and properties of a wide range of Earth materials. Tossell's recent research focuses on using computational methods to develop more efficient and cost-effective ways to remove CO2 from the atmosphere. His previous honors include: Honorary Woodrow Wilson Fellow; National Science Foundation Graduate Fellow, 1966-71; Distinguished Young Scientist of Maryland, 1978; Fellow, Mineralogical Society of America. During his career to date, he has authored over 200 papers.
The ACS Geochemistry Division Medal was awarded at a special Geochemistry Division swards symposium, which was held on March 29th, 2011, at the ACS Spring National Meeting in Anaheim, CA.