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TitleBiosorption potential of dead and living Arthrobacter viscosus biomass in the removal of Cr(VI): Batch and column studies
Author(s)Hlihor, R.
Figueiredo, Hugo
Tavares, T.
Gavrilescu, Maria
KeywordsCr(VI) removal/reduction
A. viscosus
Bacterial biofilm
Aqueous solution
Issue dateMay-2017
PublisherInstitution of Chemical Engineers (IChemE)
JournalProcess Safety and Environmental Protection
CitationHlihor, R.; Figueiredo, Hugo; Tavares, T.; Gavrilescu, Maria, Biosorption potential of dead and living Arthrobacter viscosus biomass in the removal of Cr(VI): Batch and column studies. Process Safety and Environmental Protection, 108, 44-56, 2017
Abstract(s)Batch experiments were conducted with dead and living Arthrobacter viscosus biomass for Cr(VI) removal from aqueous solution. Both dead and living cells successfully reduced Cr(VI) to Cr(III) from aqueous solution in highly acidic pH (pH 1 and 2) with an efficiency of 100% for aqueous solutions having the initial concentrations of Cr(VI) lower than 100 mg/L. Langmuir isotherm and kinetic models based on reduction could simulate chromium removal at 5 and 8 g/L biosorbent dosages and in highly acidic pH conditions (pH = 1-2). Further, the potential use of the Arthrobacter viscosus biomass was examined in an open system, where Cr(VI) removal from aqueous solution was performed by a bacterial biofilm supported on a new type of polyethylene supports. The experiment showed a favorable uptake of chromium ions bound to the biomass, of 20.37 mg/g, with high potential for scaling up. This study showed that the reduction of toxic Cr(VI) to the less toxic Cr(III) by Arthrobacter viscosus, in batch and continuous modes is an efficient and promising technique for wastewaters polluted with chromium.
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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