Silica-Water-Organics Interactions.

Formation of Silica Glaze Rock Coatings through Water Vapor Interactions

Manganiferous rock varnish (desert varnish) is common in subtropical deserts, but coatings of amorphous silica glaze dominate rock surfaces of the same lithology and exposed to similar amounts of annual precipitation in the rain shadows of the large tropical shield volcanoes such as those in Hawaii. Lacking an explanation for this contrast, a two decade-long laboratory experiment tested importa...

Epidemiological evidence of carcinogenicity of chlorinated organics in drinking water.

Concern has recently been voiced over possible chronic toxicity associated with chlorination of public drinking water supplies in the United States. This paper reviews the available evidence and the studies underway to further evaluate hypothesized associations between cancer risk and byproducts of chlorination. Preliminary data from measures of halogenated volatiles and personal exposure histo...

A colorimetric sensor array for organics in water.

Molecular recognition of organic compounds in aqueous solutions is inherently challenging due to the potential interference from the very high concentration of water. Here we present a simple colorimetric sensor array that probes a wide range of chemical properties. By printing hydrophobic dyes on a hydrophobic membrane, sensor arrays are easily prepared that provide substantial chemical select...

Ozone Treatment of Soluble Organics in Produced Water (feac307)

Liquid water and organics in Comets: implications for exobiology

Liquid water in comets, once considered impossible, now appears to be almost certain. New evidence has come from the discovery of clay minerals in comet Tempel 1, which compliments the indirect evidence in aqueous alteration of carbonaceous chondrites. Infrared spectral indication of clay is confirmed by modelling data in the 8–40 mm and 8–12 mm wavebands on the basis of mixtures of clays and o...