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Reduction of azo dyes by anaerobic bacteria: microbiological and biochemical aspects

  • Francisco J. CervantesEmail author
  • André B. Dos Santos
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Abstract

Azo dyes are recalcitrant pollutants commonly found in several industrial wastewaters, such as those originated from textile factories, which generally persist to biological transformation. Discharge of these effluents in open water bodies not only represents an aesthetic problem, but also may limit photosynthesis in aquatic plants. Furthermore, many azo dyes and products derived from their partial transformation in the environment (e.g. aromatic amines) may be toxic or carcinogenic. Biological wastewater treatment processes have emerged as promising technologies to remove azo dyes from industrial effluents and intensive research has been conducted during the last two decades in order to elucidate the mechanisms involved in the reductive decolourisation of azo dyes. The present work describes the main biochemical and microbiological aspects involved in the reductive decolourisation of azo dyes by anaerobic bacteria.

Keywords

Anaerobic decolourisation Bacterial consortia Biological wastewater treatment Textile industry 

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Francisco J. Cervantes
    • 1
    Email author
  • André B. Dos Santos
    • 2
  1. 1.División de Ciencias AmbientalesInstituto Potosino de Investigación Científica y Tecnológica (IPICyT)San Luis PotosíMexico
  2. 2.Departamento de Engenharia Hidráulica e AmbientalUniversidade Federal do CearáFortaleza, CearáBrazil

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