An electrochemical treatment (EC) was applied at different intensities to degrade the chromophoric groups of dyes C.I. Reactive Black 5 (RB5) and C.I. Reactive Blue 7 (Rb7) until uncolored species were obtained. Decolorization rate constants of the azo dye RB5 were higher than the phtalocyanine Rb7 ones. In addition, the EC treatment was more efficient at higher intensities, but these condition...

This study aimed at comparing various advanced oxidation processes (H2O2, UV, UV/H2O2, Fe /H2O2, UV/Fe /H2O2) for textile dye Reactive Red 195 decolorization. The use of blast furnace dust (BFD) was also investigated as an alternative source of iron in catalytic peroxidation with and without UV radiation. The effects of H2O2 and dye concentrations in kinetics of decolorization were studied. Dec...

The aim of the present study was to use a bacterial isolate for decolorization and reduction of pollution from textile effluent. Shewanella putrefaciens was isolated from raw textile effluent and used to decolorize the effluent, in unoptimized and optimized conditions. In unoptimized condition the decolorization was 27.95% whereas in optimized condition it reached 63.15% (Chrysophenine optimize...

Mix consortia of Bacillus sp was used to decolorize Direct Blue dye 2B. The bacterial cultures exhibited 60 % decolorization ability within 48 h at temperature 40 o C and pH 7. Maximum rate of decolorization was observed (60%) when starch was supplemented in the medium. Decolorization of Direct Blue dye 2B was monitored by TLC, which indicated that dye decolorization was due to its degradation ...

Results Materials and Methods Four commercial dyes were used — Remazol® Black BA, Levafix® Blue Ca, Levafix® Yellow CA and Levafix® Red CA (Dystar). A standard anthraquinone dye, Remazol Brilliant Blue R (RBBR, Sigma) was also used. Dye stock solutions were added to solid or liquid decolorization media, up to 200 mg.L-1 final concentration. Rose Bengal Agar and Potato Dextrose Agar (both from D...

BACKGROUND Laccases have good potential as bioremediating agents and can be used continuously in the immobilized form like many other enzymes. METHODS In the present study, laccase from Cyathus bulleri was immobilized by entrapment in Poly Vinyl Alcohol (PVA) beads cross-linked with either nitrate or boric acid. Immobilized laccase was used for dye decolorization in both batch and continuous ...

The textile industries by for the most passionate user of synthetic dyes are in need of ecoefficient solutions for its coloured effluents. The decolorization and detoxification potential of white rot fungi can be harnessed. Laccase has been utilized in biological treatment of effluents containing chemical dyes. The present study is planned to study the screening and chrecterization of laccase f...

The aim of the present study is to analyze the ability of the white rot fungi Coriolus Versicolor (MTCC 138) in the decolorization of Cibacron Yellow S-3R, a recalcitrant azo reactive textile dye. The influencing parameters that affect the percentage of decolorization rates are optimized in batch mode. The optimal values of the parameters such as mycelia age, temperature, pH, initial dye concen...

The studies regarding decolorization of dyes by laccase may not only inform about the possible application of this enzyme for environmental purposes, but also may provide important information about its reaction mechanism and the influence of several factors that could be involved. In this paper, decolorization of crystal violet and phenol red was carried out with different fractions of extrace...

Decolorization of azo dye Red 3BN by two bacterial species Bacillus cereus and B. megaterium has been analyzed using mineral effluent, consisting of known concentration of the dye in ZZ medium. Physico chemical parameters like carbon source, nitrogen source, temperature, pH and inoculum volume are optimized for the decolorization process by changing one parameter at a time. Optimal condition fo...