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Microbial Capacities for Utilization of Nitroaromatics

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Innovations in Biotechnology for a Sustainable Future

Abstract

Nitroaromatics chemicals (NACs) are the major pollutants released during the post-industrialization phase of the environment and most of the nitroaromatic compounds are toxic andmutagenic for living organisms. Substituents on nitro on the NAC consist of an electron-withdrawing character, which causes resistance toward biodegradation. Therefore, the oxidativeattack by bacterial oxygen becomes difficult. Nevertheless, many powerful bacteria have adapted to use NAC using oxygen. An increase in the number of nitro groups and the substitutionof electron-withdrawing on the aromatic ring causes an increase in the recalcitrant character to force the nitromatics used by the partial reduction mechanism. Nitroaromatic compounds are partially or completely degraded by a wide range of microorganisms, using the oxidative and reductive downgrading pathways to convert NACs completely into CO2 and H2O or partially to organic compounds. It is the genetic machinery present in microbes that directs the conversion of NAC to simple products. While aerobic bacteria use the aerobic and partial reductive catabolic pathways systems, anaerobic bacteria were able to use only the reductive mechanism to use NAC.

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Ramesh, B., Kameswaran, S., Venkatrayulu, C., Chandra, M.S., Reddy, G.V.S., Ramakrishna, M. (2021). Microbial Capacities for Utilization of Nitroaromatics. In: Maddela, N.R., García, L.C. (eds) Innovations in Biotechnology for a Sustainable Future. Springer, Cham. https://doi.org/10.1007/978-3-030-80108-3_12

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