NDLI: Adsorption and decolorization of dyes using solid residues from Pleurotus ostreatus mushroom production

Content Provider	Springer Nature Link
Author	Papinutti, Leandro Forchiassin, Flavia
Copyright Year	2010
Abstract	We investigated the use of solid residues from Pleurotus ostreatus mushroom production in adsorbing and decolorizing different dyes. The solid residue used in this study was composed of hemicellulose and cellulose (52.81 %), acid-insoluble lignin (25.42%), chitin (6.5%), and water extractives (14.82%). After incubating 14% (wt/vol) solid residue in distilled water for 4 h, laccase and manganese peroxidase (MnP) activities were 0.5 U/g and 12 mU/g, respectively. Enzymatic decolorization percentages were up to 100 for azure B (heterocyclic dye) and indigo carmine (indigoid dye), 74.5 for malachite green (MG) (triphenylmethane dye), and zero for xylidine (azoic dye). The optimum temperature for decolorization was in the range of 26 ∼ 36°C for all dyes. Data obtained on adsorption (enzymatic decolorization was prevented with sodium azide) at different dye concentrations and in a pH range of 3 ∼ 7 were used to plot Freundlich isotherms. The spent fungal substrate (SFS) displayed large differences in adsorption capacity, depending on the dye tested. The highest adsorption capacity was observed at pH 3 for MG, while xylidine was slightly adsorbed at pH 3 and 4 and not adsorbed at higher pH values. Laccase and MnP production were affected by the presence of the dyes. The highest enzyme levels were observed in the presence of MG, when laccase and MnP increased 1.39- and 2.13-fold, respectively. Decolorization and adsorption to SFS are both important processes in removing dyes from aqueous solutions. The application of this spent substrate for wastewater treatment will be able to take advantage of both of these dye removal processes. An important problem in bioremediation processes involving microorganisms is the amount of time required for their growth. In this report, we used the spent substrates from mushroom cultivation in wastewater treatment, thus solving the problem of waiting for microorganisms to grow.
Starting Page	1102
Ending Page	1109
Page Count	8
File Format	PDF
ISSN	12268372
Journal	Biotechnology and Bioprocess Engineering
Volume Number	15
Issue Number	6
e-ISSN	19763816
Language	English
Publisher	The Korean Society for Biotechnology and Bioengineering
Publisher Date	2011-02-15
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	adsorption bioremediation dyes laccase ligninases white rot fungi Industrial and Production Engineering Biotechnology
Content Type	Text
Resource Type	Article
Subject	Bioengineering Biomedical Engineering Applied Microbiology and Biotechnology Biotechnology

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