Pseudomonas fluorescens can be used for bioremediation of textile effluent Direct Orange-102
نویسندگان
چکیده
Dyes present in the effluent of textile industries are recalcitrant molecules difficult to be degraded biologically. In this study we used Pseudomonas fluorescens to degrade Direct Orange 102 dye. Pseudomonas fluorescens NCIM 2100 was obtained from National Chemical Laboratory, Pune, India, that was adapted to grow on Direct Orange 102. The dye was subjected to degradation by the bacterium and its metabolic products were identified by UV, 1HNMR and IR spectrophotometry. The dye was first broken down into 3, 7diamino4 hydroxy naphthalene 2 sulfonic acid sodium salt. This compound is further degraded into 7amino -3, 4dihydroxy naphthalene2sulfonic acid sodium salt or 3amino-4-7dihydroxynaphthalene -2 sulfonic acid sodim salt or 1,3,4,5,6,7,8 heptahydroxy naphthalene 2 sulfonic acid sodium salt. These breakdown compounds were non toxic in nature. Therefore, Pseudomonas fluorescens can be used for bioremediation of textile effluent containing Direct Orange102 dye. Resumen: Los colorantes presentes en las aguas residuales de la industria textil son moléculas recalcitrantes difíciles de degradar biológicamente. En este estudio usamos Pseudomonas fluorescens para degradar el colorante Anaranjado Directo 102. Se obtuvieron Pseudomonas fluorescens NCIM 2100 del Laboratorio Químico Nacional, Pune, India, que estaban adaptadas al crecimiento en Anaranjado Directo 102. El colorante fue sometido a degradación por la bacteria y sus productos metabólicos fueron identificados por espectrofotometría UV, 1HNMR e IR. Primero el colorante se degradó en sal sódica de ácido 3,7 diamino 4 hidroxi naftaleno 2 sulfónico. Este compuesto se convierte a su vez en sal só-dica de ácido 7 amino 3, 4 dihidroxi naftaleno 2 -sulfónico, o sal sódica de ácido 3-amino 4,7 dihidroxi naftaleno2 sulfónico, o sal sódica de ácido 1,3,4,5,6,7,8 heptahidroxi naftaleno 2 sulfónico. Estos compuestos resultantes de la degradación no fueron tóxicos en la naturaleza. Por lo tanto, se puede usar Pseudomonas fluorescens para la biorremediación de las aguas residuales textiles que contengan colorante Anaranjado Directo 102. Resumo: Os corantes presentes no efluente das indústrias têxteis são de moléculas recalcitrantes difíceis de degradar biologicamente. Neste estudo usou-se a Pseudomonas fluorescens para degradar o corante “Direct Orange 102”. A Pseudomonas fluorescens NCIM 2100 foi obtida do Laboratório Químico Nacional, Prune, Índia. O corante foi sujeito a degradação pela bactéria e os seus produtos de metabólise forma identificados com recurso a UV, 1HNMR e Espectrografia de IR. O corante foi primeiramente cindido no sal sódico do ácido 3,7-Diamino-4-hidroxilo-naftaleno-2-sulfonico. Este composto é seguidamente decomposto no sal sódico do ácido 7-amino-4,7-dihidroxi-naftaleno-2-sulfonico ou 3-Amino-4,7-dihidroxi-naftaleno2-sulfonico ou no sal sódico do ácido 1,3,4,5,6,7,8-Heptahidroxil-naftaleno-2-sulfonico. Estes compostos da cisão não eram tóxicos na natureza. Assim, a Pseudomonas fluorescens pode ser usada na bioremediação dos efluentes têxteis contendo “Direct Orange 102”.
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