Papers by Alessandra Z Santos
Holos Environment
Abstract: The main objective of this study was to evaluate the photocatalytic oxidation process t... more Abstract: The main objective of this study was to evaluate the photocatalytic oxidation process to decolorize the commercial textile dye Intense Black and a textile effluent, aiming to obtain a final effluent for reuse in the industry. Both dye and textile effluent was obtained ...
Brazilian Journal of Chemical Engineering, 2002
The aim of this work was to evaluate the decolorization of a textile effluent and of reactive dye... more The aim of this work was to evaluate the decolorization of a textile effluent and of reactive dyes by the basidiomycete Pleurotus pulmonarius and by laccase. The fungus decolorized all dyes. The decolorization percent varied from 47% to 98%. The dyes did not inhibit the biomass growth and in all experiments, the COD reduction was verified. The fungus also decolorized the effluent. Evaluating the influence of the inoculum concentration and the medium agitation speed on the decolorization, the best result, around 62%, was obtained using 50rpm and 50% of inoculum concentration. For the experiments using laccase, the decolorization percent of the dyes blue-bf-r, turquoise blue, navy blue-ble, rbb-r, yellow-gle, black and grey was greater than 30%. For the dyes scarlet red, red-4b and yellow-3r, the decolorization results were bellow 20%. The effluent decolorization was about 35%. The fungus, as well as the enzyme, decolorized the textile effluent and dyes.
Environmental Engineering and Management Journal, 2006
The aim of this work was to evaluate the decolorization of a textile effluent and of reactive dye... more The aim of this work was to evaluate the decolorization of a textile effluent and of reactive dyes by the basidiomycete Pleurotus pulmonarius and by laccase. The fungus decolorized all dyes. The decolorization percent varied from 47% to 98%. The dyes did not inhibit the biomass growth and in all experiments, the COD reduction was verified. The fungus also decolorized the effluent. Evaluating the influence of the inoculum concentration and the medium agitation speed on the decolorization, the best result, around 62%, was obtained using 50rpm and 50% of inoculum concentration. For the experiments using laccase, the decolorization percent of the dyes blue-bf-r, turquoise blue, navy blue-ble, rbb-r, yellow-gle, black and grey was greater than 30%. For the dyes scarlet red, red-4b and yellow-3r, the decolorization results were bellow 20%. The effluent decolorization was about 35%. The fungus, as well as the enzyme, decolorized the textile effluent and dyes.
The ligninolytic fungus Pleurotus ostreatoroseus (synonymy of Pleurotus ëous) was used to treat t... more The ligninolytic fungus Pleurotus ostreatoroseus (synonymy of Pleurotus ëous) was used to treat the first alkali extraction stage (E1) effluent of a kraft bleach plant. It was pelletized and used for two continuous experiments in a two-liter turbulent-flow bioreactor. In the first experiment, the average removal of color and of total phenols was 18.6 and 11.6%, respectively, after the addition of glucose. During the second experiment, which was developed with the addition of several quantities of glucose, the maximum removal of color, of total phenols and of lignin/chlorolignin was 19.4, 9.4 and 44.5%. For both experiments, the best results were obtained when the effluent was diluted and enriched with glucose. This indicated the need for an extra carbon source for the fungal treatment. Using the mycelial mass in suspension, three experiments were carried out. The best results were obtained with 20% fungus and shaking of the effluent. During the last three days of the experiment the average removal of color, of total phenols and of lignin/chlorolignin was 84.4±6.1, 82.1±5.7 and 72.4±8.9, respectively. The results indicate the potential of Pleurotus ostreatoroseus for use in the treatment of E1 effluent.
The aim of this work was to evaluate the decolorization of a textile effluent and of reactive dye... more The aim of this work was to evaluate the decolorization of a textile effluent and of reactive dyes by the basidiomycete Pleurotus pulmonarius and by laccase. The fungus decolorized all dyes. The decolorization percent varied from 47% to 98%. The dyes did not inhibit the biomass growth and in all experiments, the COD reduction was verified. The fungus also decolorized the effluent. Evaluating the influence of the inoculum concentration and the medium agitation speed on the decolorization, the best result, around 62%, was obtained using 50rpm and 50% of inoculum concentration. For the experiments using laccase, the decolorization percent of the dyes blue-bf-r, turquoise blue, navy blue-ble, rbb-r, yellow-gle, black and grey was greater than 30%. For the dyes scarlet red, red-4b and yellow-3r, the decolorization results were bellow 20%. The effluent decolorization was about 35%. The fungus, as well as the enzyme, decolorized the textile effluent and dyes.
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Papers by Alessandra Z Santos