Real-time QEXAFS spectroscopy measures rapid precipitate formation at the mineral-water interface

Matthew Siebecker, Wei Li, Syed Khalid, Donald Sparks

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

Reactions at the mineral-water interface are central to numerous geochemical processes and have consequences at local, regional and global scales. They are also important in materials science research. Kinetics greatly influences mineral-water interface reactions; however, there are few kinetic data in real-time and at the molecular scale. Here we report real-time data illustrating the rapid formation of nickel aluminium-layered double hydroxide precipitates at the mineral-water interface in a flow environment in as little as 31-40â €‰min. Layered double hydroxides have a variety of applications in environmental remediation and materials science. The real-time data shown here enhance our fundamental understanding of the kinetics of mineral-water interface processes, such as adsorption, dissolution and precipitation, by illustrating their rapid and simultaneous occurrence in a dynamic environment. Both precipitation and adsorption can occur on the same rapid timescale.

Original languageEnglish
Article number5003
JournalNature Communications
Volume5
DOIs
StatePublished - 2014

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