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Environmental Science and Pollution Research

, Volume 21, Issue 16, pp 9578–9588 | Cite as

Biodegradation of organic pollutants in saline wastewater by halophilic microorganisms: a review

  • Laura C. Castillo-Carvajal
  • José Luis Sanz-Martín
  • Blanca E. Barragán-HuertaEmail author
Review Article

Abstract

Agro-food, petroleum, textile, and leather industries generate saline wastewater with a high content of organic pollutants such as aromatic hydrocarbons, phenols, nitroaromatics, and azo dyes. Halophilic microorganisms are of increasing interest in industrial waste treatment, due to their ability to degrade hazardous substances efficiently under high salt conditions. However, their full potential remains unexplored. The isolation and identification of halophilic and halotolerant microorganisms from geographically unrelated and geologically diverse hypersaline sites supports their application in bioremediation processes. Past investigations in this field have mainly focused on the elimination of polycyclic aromatic hydrocarbons and phenols, whereas few studies have investigated N-aromatic compounds, such as nitro-substituted compounds, amines, and azo dyes, in saline wastewater. Information regarding the growth conditions and degradation mechanisms of halophilic microorganisms is also limited. In this review, we discuss recent research on the removal of organic pollutants such as organic matter, in terms of chemical oxygen demand (COD), dyes, hydrocarbons, N-aliphatic and N-aromatic compounds, and phenols, in conditions of high salinity. In addition, some proposal pathways for the degradation of aromatic compounds are presented.

Keywords

Halophilic Biodegradation Hydrocarbons Dyes Pollutants PAH Phenols 

Notes

Acknowledgments

The present research was financially supported by the National Polytechnic Institute (Project SIP-20131865). L Castillo-Carvajal received a scholarship from the Consejo Nacional de Ciencia y Tecnología (México).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Laura C. Castillo-Carvajal
    • 1
  • José Luis Sanz-Martín
    • 2
  • Blanca E. Barragán-Huerta
    • 1
    Email author
  1. 1.Departamento de Ingeniería en Sistemas Ambientales, Escuela Nacional de Ciencias BiológicasInstituto Politécnico NacionalUnidad Profesional Adolfo López MateosMexico
  2. 2.Departamento de Biología Molecular, Facultad de CienciasUniversidad Autónoma de MadridMadridSpain

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