Kinetic and ecotoxicological evaluation of the direct orange 26 dye degradation by Fenton and solar photo-Fenton processes




Chemical oxidation, Chemical oxygen demand, Textile dyes


The presence of color in textile effluents has been studied because of the need for more effective treatments. Therefore, advanced oxidative processes (AOP) have been used in the degradation of dyes, as well as in the conversion of organic matter. This study evaluated the degradation of the direct orange 26 textile dye by Fenton and photo-Fenton processes (with natural solar radiation). A statistical analysis, based on factorial 23 indicated the best working conditions, being: [H2O2] = 100 mg·L-1 and pH 3-4, for both AOP in that the [Fe] =  1 e 5 mg·L-1, for photo-Fenton and Fenton, respectively. The results of the kinetic studies demonstrated a good fit to the nonlinear kinetic model proposed by Chan and Chu, with values of R2 > 0,996 (photo-fenton) and R2 > 0,939 (Fenton). The tests performed to evaluate the chemical oxygen demand indicated conversions of 62.05% (Fenton) and 66.41% (photo-Fenton). Finally, the ecotoxicity study indicated that the post-treatment samples were non-toxic to the bacteria Escherichia coli and Proteus mirabilis but showed growth inhibition for Lactuca sativa (Fenton and photo-Fenton) seeds and for Brassica juncea and Portulaca grandiflora (Fenton).


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Author Biographies

Rayany Magali da Rocha Santana, Universidade Federal de Pernambuco / Departamento de Engenharia Química

Aluna de mestrado do Programa de Pós-graduação em Engenharia Química da Universidade Federal de Pernambuco

Polyana Karynne de Aguiar Silva, Universidade Federal de Pernambuco / Departamento de Engenharia Química

Graduação em andamento em Química Industrial.
Universidade Federal de Pernambuco, UFPE, Brasil.

Alex Leandro Andrade de Lucena, Universidade Federal de Pernambuco / Departamento de Engenharia Química

Atualmente é aluno de doutorado em Engenharia Química pela Universidade Federal de Pernambuco.

Thamara Figueiredo Procópio, Universidade Federal de Pernambuco / Departamento de Bioquímica

 Doutora em Bioquímica e Fisiologia pela Universidade Federal de Pernambuco (UFPE). 

Thiago Henrique Napoleão, Universidade Federal de Pernambuco / Departamento de Bioquímica

Professor na Universidade Federal de Pernambuco / Departamento de Bioquímica

Marta Maria Menezes Bezerra Duarte, Universidade Federal de Pernambuco / Departamento de Engenharia Química

 Professora do Departamento de Engenharia Química da Universidade Federal de Pernambuco

Daniella Carla Napoleão, Universidade Federal de Pernambuco / Departamento de Engenharia Química

Atualmente é professora Adjunta AII da Universidade Federal de Pernambuco


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How to Cite

Santana, R. M. da R., Nascimento, G. E. do, Silva, P. K. de A., Lucena, A. L. A. de, Procópio, T. F., Napoleão, T. H., Duarte, M. M. M. B., & Napoleão, D. C. (2018). Kinetic and ecotoxicological evaluation of the direct orange 26 dye degradation by Fenton and solar photo-Fenton processes. Revista Eletrônica Em Gestão, Educação E Tecnologia Ambiental, 22, e5.




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