Monitoring the mineral-water interface

Microbiological monitoring of mineral water commercialized in Brazil

The quality of mineral water commercialized in Brazil regarding the microbial content was analyzed and the results were compared with the standards established by the current legislation. Results demonstrated there was no bacterial contamination, but several types of fungi were found. Therefore, bottled mineral water could be considered a possible route for the transmission of filamentous fungi...

Probing the Organic-mineral Interface

An ATR-FTIR spectroscopic approach for measuring rapid kinetics at the mineral/water interface.

This study presents a methodology for studying rapid kinetic reactions for IR active compounds. In soils, sediments, and groundwater systems a rapid initial chemical reaction can comprise a substantial portion of the total reaction process at the mineral/water interface. Rapid-scan attenuated total reflectance (ATR) Fourier transform infrared (FTIR) spectroscopy is presented here as a new metho...

Effect of iron oxide coatings on zinc sorption mechanisms at the clay-mineral/water interface.

Oxide surface coatings are ubiquitous in the environment, but their effect on the intrinsic metal uptake mechanism by the underlying mineral surface is poorly understood. In this study, the zinc (Zn) sorption complexes formed at the kaolinite, goethite, and goethite-coated kaolinite surfaces, were systematically studied as a function of pH, aging time, surface loading, and the extent of goethit...

Temperature Effects on Nickel Sorption Kinetics at the Mineral–Water Interface

spectroscopic and microscopic investigations, determination of basic thermodynamic and kinetic parameters In recent years, innovative studies have shown that sorption of for the formation of these precipitates, such as the metals onto natural materials results in the formation of new minerallike precipitate phases that increase in stability with aging time. While energy of activation, and entha...