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UV/TiO2 photocatalytic degradation of xanthene dyes
Pereira, Luciana; Pereira, Raquel; Oliveira, Catarina S.; Apostol, Laura; Gavrilescu, M.; Pons, M. N.; Zahraa, O.; Alves, M. M.UV/titanium dioxide (TiO2) degradation of two xanthene dyes, erythrosine B (Ery) and eosin Y (Eos), was studied in a photocatalytic reactor. Photocatalysis was able to degrade 98% of Ery and 73% of Eos and led to 65% of chemical oxygen demand removal. Experiments in buffered solutions at different initial pH values reveal the pH dependence of the process, with better results obtained under acidic conditions due...
Bioremediation of Cr(VI) polluted wastewaters by sorption on heat inactivated S...
Hlihor, R. M.; Diaconu, M.; Fertu, D.; Chelaru, C.; Sandu, I.; Gavrilescu, M.; Tavares, T.The potential of heat inactivated Saccharomyces cerevisiae in the bioremoval and reduction of Cr (VI) ions from wastewaters was evaluated in terms of metal uptake in time and at equilibrium, and biosorption efficiency, by varying pH, biosorbent doses, contact time and temperature, in batch mode. During the sorption process, the heat inactivated biomass of the yeast Saccharomyces cerevisiae is capable of reducin...
Biological decolorization of xanthene dyes by anaerobic granular biomass
Apostol, Laura; Pereira, Luciana; Pereira, Raquel; Gavrilescu, M.; Alves, M. M.Biodegradation of a xanthene dyes was investigated for the first time using anaerobic granular sludge. On a first screening, biomass was able to decolorize, at different extents, six azo dye solutions: acid orange 7, direct black 19, direct blue 71, mordant yellow 10, reactive red 2 and reactive red 120 and two xanthene dyes—Erythrosine B and Eosin Y. Biomass concentration, type of electron donor, induction of ...
Effect of ferromagnetic nanoparticle on dyes biodegradation
Apostol, Laura; Pereira, Luciana; Pereira, Raquel; Alves, M. M.; Gavrilescu, M.In this study the biodecolourisation of two dyes, a xanthene dye, Erythrosine B (Ery B) and an azo dye, Reactive Red 51 (RR120), was investigated colourdecolourisationunder batch anaerobic conditions by using non - acclimated anaerobic granular sludge. The effect of ferromagnetic nanoparticle (FN) (as adsorbent or mediator) on dyes removal was experienced.
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