Biotransformations of selenium oxyanion by filamentous cyanophyte-dominated mat cultured from agricultural drainage waters

Article Abstract:

Selenium volatilization experiments using a filamentous cyanophyte-dominated mat show that selenium depletion in the control was due to the formation of dimethylselenide, dimethyldiselenide and dimethylselenenylsulfide. Experiments also reveal precursors methylselenomethionine and methylselenocysteine. The mechanisms involved may explain the 100% selenium depletion in a California agricultural drainage evaporation basin.

Research and Development in the Physical, Engineering, and Life Sciences, Water Pollution, Water Pollution Control R&D, Selenium, Selenium (Chemical element), Water pollution research, Agricultural wastes, Selenium compounds

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Oxidative degradation of 2,4,6-trinitrotoluene by ozone in an electrohydraulic discharge reactor

Article Abstract:

Oxidative degradation rates of aqueous 2,4,6-trinitrotoluene by ozone has been found to be dependent on ozone concentrations, pH levels, discharge energies and electrode gap lengths. Results of oxidation experiments in the electrohydraulic discharge reactor also reveal that rapid mineralization rates may be attributed to the action of UV light on the ozone to produce a high flux of hydroxyl radicals per dircharge.

Industrial Water Pollution, Analysis, Decomposition (Chemistry), Nitrogen compounds, Electrolysis

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