Elements Covers

Posts by Michael F. Hochella, Jr.

Improving Mitigation of the Long-Term Legacy of Mining Activities: Nano- and Molecular-Level Concepts and Methods

Mining activities over several millennia have resulted in a legacy of environmental contamination that must be mitigated to minimize ecosystem damage and human health impacts. Designing effective remediation strategies for mining and processing wastes requires knowledge of nano- and molecular-scale speciation of contaminants. Here, we discuss how modern nano- and molecular-level concepts and methods can be used to improve risk assessment and future management of contaminants that result from mining activities, and we illustrate this approach using relevant case studies.

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Tribute to Paul H. Ribbe 1935–2017

Paul Hubert Ribbe, a giant in the field of mineralogy, passed away 24 June 2017 at the age of 82. Just eight weeks earlier, he was preceded in death by Elna Ribbe, his wife of almost 59 years. Paul was born 2 April 1935 in Bristol, Connecticut (USA), to the Reverend Walter and Grace Ribbe. He obtained his BS from Wheaton College (Illinois, USA) and his MS from the University of Wisconsin, Madison (USA), both in geology. He was the first American Fulbright Scholar admitted to Magdalene College, University of Cambridge (UK), where he worked at the Cavendish Laboratory with the legendary crystallographer Helen Megaw. He was awarded a PhD in 1963 for his research on the crystal structure of plagioclase feldspars. Following a short post-doc (University of Chicago, USA) and an assistant professorship (University of California, Los Angeles, USA), in 1966, Paul and Elna moved to Blacksburg (Virginia, USA) where he joined the Department of Geology at Virginia Tech. Paul became part of a powerhouse of talent in mineralogy and petrology that included Donald Bloss, Gerald Gibbs, Charles Gilbert, and the late David Wones.

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The New Earth and Environmental Nanoscience and Technology Centers Sponsored by NSF

Nanoscience, and the technology that stems from it (that is, nanoscience and technology), constitutes one of the great revolutions that originated in the twentieth century. Development in this field is crucial because it is central to some of the most vital issues of the twenty-first century, including safe water, mineral and energy resource development, local/regional/global contaminant issues (including disease transmission), and global climate change.

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