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TitleWicherhamomyces anomalus biofilm supported on wood husk for chromium wastewater treatment
Author(s)Asri, Meryem
El Ghachtouli, Naïma
Elabed, Soumya
Koraichi, Saad Ibnsouda
Elabed, Alae
Silva, Bruna Andreia Nogueira Airosa
Tavares, T.
wood husk
Issue date5-Oct-2018
JournalJournal of Hazardous Materials
CitationAsri, Meryem; El Ghachtouli, Naïma; Elabed, Soumya; Koraichi, Saad Ibnsouda; Elabed, Alae; Silva, Bruna; Tavares, Teresa, Wicherhamomyces anomalus biofilm supported on wood husk for chromium wastewater treatment. Journal of Hazardous Materials, 359, 554-562, 2018
Abstract(s)A Wickeramomyces anomalus biofilm supported on wood husk was used to remediate water bodies contaminated with chromium (Cr), in batch and open systems. The favorable adhesion ability of the chromium-resistant yeast strain on the wood husk was predicted by XDLVO theory and confirmed by environmental scanning electronic microscopy. The chromium decontamination was then optimized in a batch mode using a central composite design (CCD). Analysis of variance (ANOVA) showed a high coefficient of determination (R2) value of 0.93 0.91 for Cr(VI) and total Cr removal, respectively, ensuring a satisfactory fitting of the second-order regression model to the experimental data. In batch system, the concentration of biomass exhibited the minimal effect on the process. An acidic pH of 3.72 and 5.48, an initial chromium concentration of 10 and 16.91mg/L and a support dose of 6.95 and 8.20g/L were optimal for Cr(VI) and total Cr removal, respectively. The breakthrough curves were determined in open system for different initial chromium concentrations. The study of glucose concentration effect on the yeast extracellular polymeric substances (EPS) production showed that a medium exempt of glucose allowed maximal EPS production and minimal chromium removal efficiency, while 20g/L glucose concentration of presented the optimal condition for chromium removal.
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AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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