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    Decolorization of Congo red mediated by marine Alcaligenes species isolated from Indian West coast sediments

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    Envir_Ear_Sci_76(20)_721.pdf (1.538Mb)
    Date
    2017
    Author
    DeSouza, E.
    Fulke, A.B.
    Mulani, N.
    Ram, A.
    Asodekar, M.
    Narkhede, N.
    Gajbhiye, S.N.
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    Abstract
    Alcaligenes species capable of degrading highly recalcitrant, carcinogenic, water-soluble dye-Congo red-were isolated from Indian West coastal sediments. Individual strains showed decolorization rates ranging from 76.49 to 98.76% within 24-48 h. Decolorization was most efficient at anoxic conditions catalyzed by intracellular azoreductase enzyme with an activity of 0.032 μmol min?1 mg?1 of protein. Degradation was confirmed by HPLC and FTIR analysis. LC/MS analysis of degraded metabolites established the cleavage of the azo bond-producing biphenyl diamine and 1,2?-diaminonapthalene-4-sulfonic acid. These results signify the effectiveness and ease to engineer processes such as feed batch/immobilized cell systems using these strains as biocatalysts to address the problem of global coastal water pollution caused by increased disposal of azo dye-containing industrial effluents.
    URI
    https://doi.org/10.1007/s12665-017-7077-8
    http://drs.nio.org/drs/handle/2264/7781
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