Degradation of monoethanolamine in soil
- 1 March 2004
- journal article
- Published by Thomas Telford Ltd. in Journal of Environmental Engineering and Science
- Vol. 3 (2) , 137-145
- https://doi.org/10.1139/s03-074
Abstract
Monoethanolamines (MEA) are commonly used by the natural gas industry to remove acid gases from the natural gas stream. A series of pan studies was conducted to examine the biodegradability of MEA in soil recovered from a gas plant site under various environmental conditions. Experimental results indicate that MEA was successfully biodegraded or transformed into other compounds under both aerobic and anaerobic conditions even at concentrations greater than 1500 mg/kg. Ammonium, acetate, and nitrogen gas were the dominant by-products in these experiments. The generation of nitrogen gas suggests that simultaneous nitrification and denitrification occurred because of the existence of anoxic zones resulting from diffusion limited oxygen transport into the soils. Cold temperatures (5 °C) reduced the biodegradation rates significantly compared to rates at room temperature. Key words: bioremediation, monoethanolamine, ammonia, acetate, pan study, cold temperature. Les monoéthanolamines sont fréquemment utilisées par l'industrie du gaz naturel pour retirer les gaz acides des courants gazeux. Une série d'études en laboratoire a été menée pour examiner la biodégradabilité des monoéthanolamines, dans les sols récupérés d'un site de raffinerie de gaz, sous différentes conditions atmosphériques. Les résultats expérimentaux indiquent que les monoéthanolamines ont été biodégradées avec succès ou transformées en d'autres composés sous des conditions aérobies ou anaérobies, même à des concentrations supérieures à 1500 mg/kg. L'ammoniac, l'acétate et le gaz azoteux étaient les sous-produits dominants lors de ces expériences. La génération de gaz azoteux suggère que la nitrification et la dénitrification surviennent simultanément en raison de l'existence de zones anoxiques qui résultent de la diffusion limitée du transport d'oxygène dans les sols. La basse température (5 °C) a réduit considérablement les vitesses de biodégradation par rapport aux vitesses à la température ambi...Keywords
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