||Nitrate and Nitrite Volatilization by Microorganisms in Laboratory Experiments.
Bolla, Jean-Marc ;
||Pennsylvania State Univ., University Park. Dept. of Agronomy.
||EPA-16080; 00008,; 660/2-73-002
( Nitrogen inorganic compounds ;
Inorganic nitrates ;
Chemical removal(Sewage treatment) ;
Soil microbiology ;
Process variables ;
Water pollution control
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Microbial nitrate and nitrite volatilization was considered as a means to eliminate nitrogen from soil and water in order to inhibit the accumulation of nitrogenous substances as pollutants or health hazardous compounds. Therefore it was attempted to compare nitrate reducing microorganisms in their reactions to different environmental conditions in laboratory experiments. Changing oxygen concentration, pH, temperature, nitrate or nitrite concentration affected differently the denitrification process of various isolated microorganisms. Biological and chemical factors were evaluated during nitrite transformation in autoclaved and non-autoclaved soil by determination of the evolvement of nitrogenous gases. During chemical nitrite volatilization, which occurred essentially at a low pH, the major gases evolved were nitric oxide and nitrogen dioxide, but if biological activity was predominant in a neutral and alkaline environment, nitrous oxide and molecular nitrogen were formed. The validity of laboratory observations in relation to field studies in the domain of denitrification is discussed and evaluated. (Modified author abstract)
||Paper copy available from GPO $1.00 as EP1.23:660-73-002.
|PUB Date Free Form
||13B; 6M; 68D; 57K