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Title (Primary) Model experiments on the influence of artificial humic compounds on chemodenitrification
Author Kappelmeyer, U.; Kuschk, P.; Stottmeister, U.;
Journal Water Air and Soil Pollution
Year 2003
Department UBT; UBT_alt;
Volume 147
Issue 1-4
Language englisch;
Abstract

Chemodenitrification is of importance in both soils and the treatment of some types of wastewater. During model experiments, the impact of various conditions, such as pH and especially artificial humic matter and oxygen on this process was studied to build up kinetic models. The chemodenitrification rate decreased due to the ongoing autoxidation/polymerization of hydroquinone to artificial humic matter from 11.02 mug (L h)(-1) after 7 days autoxidation to 5.38 mug (L h)(-1) after 14 days at pH 4 under aerobic conditions and an initial nitrite concentration of 250 mug L-1. At the same pH, with the same nitrite concentration, and in the presence of Roth humic matter (2 mg L-1) under aerobic conditions, the chemodenitrification rate was 0.73 mug (L h)(-1), whereas under anaerobic conditions it was considerably higher (2.88 mug (L h)(-1)). In another model experiment, it was shown that the amount of nitrite incorporated into the artificial humic matter was less then 1%. Further, it was found that the main reaction product of chemodenitrification is NO.

ID 4954
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=4954
Kappelmeyer, U., Kuschk, P., Stottmeister, U. (2003):
Model experiments on the influence of artificial humic compounds on chemodenitrification
Water Air Soil Pollut. 147 (1-4), 317 - 330