Rostad, C E

9 items:

Mass spectrometric identification of an azobenzene derivative produced by smectite-catalyzed conversion of 3-amino-4-hydroxyphenylarsonic acid The compound 3-amino-4-hydroxyphenylarsonic acid (3-amino-HPAA) reacts with smectite to form a soluble azobenzene arsonic acid compound. This reaction is of particular interest because it provides a possible mechanism for the formation of a new type of arsenic compound in natural water systems. 3-Amino-HPAA is a degradation product excreted by chickens that are fed rations amended with roxarsone. Roxarsone is used to control coccidial intestinal parasites in most of the broiler chickens grown in the United States. The structure of the azobenzene arsonic acid compound was first inferred from negative-ion and positive-ion low-resolution mass-spectrometric analyses of the supernatant of the smectite suspension. Elemental... Categories: Publication; Types: Citation; Tags: 3-Amino-4-hydroxyphenylarsonic acid, Azobenzene derivative, Mass spectrometry
Specific organic contaminants; Chapt. 12 Categories: Publication; Types: Citation
Polar organic compounds in pore waters of the Chesapeake Bay impact structure, Eyreville core hole: Character of the dissolved organic carbon and comparison with drilling fluids Categories: Publication; Types: Citation
Data on natural organic substances in dissolved, colloidal, suspended-silt and -clay, and bed-sediment phases in the Mississippi River and some of its tributaries, 1991-92 Categories: Publication; Types: Citation
Adverse effects to Northern Shovelers from exposure to treated wastewater from Central Front Range, Colorado, wastewater treatment plants From January through February of 2007, more than 900 waterfowl, the majority of which were northern shovelers (Anas clypeata), died in apparent association with prolonged exposure to water in or near treatment tanks at a number of wastewater treatment plants located along the central Colorado Front Range. Preliminary postmortem assessments were negative for waterfowl diseases, ingested toxins, or heavy metal contaminants. The probable cause of death for most of these mortalities was the induction of a fatal hypothermia resulting from the wetting of the ducks’ feathers. To test whether prolonged exposure of waterfowl to chemical compounds in secondary treated wastewater from municipal sources may play a role in the... Categories: Publication; Types: Citation

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