Evaluation of the bioremoval of Cr(VI) and TOC in biofilters under continuous operation using response surface methodology

Leles, Daniela Martins Araujo; Lemos, Diego Andrade; Filho, Ubirajara Coutinho; Romanielo, Lucienne Lobato; Resende, Miriam Maria de; Cardoso, Vicelma Luiz

doi:10.1007/s10532-011-9523-8

Cited by 8 publications

(4 citation statements)

References 46 publications

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“…2C also shows a similar effect of yeast extract on the % Cr(VI) removal during the interaction of molasses and yeast extract. These results are similar to the results obtained for the interaction of carbon, nitrogen sources, and Cr(VI) concentration on Cr(VI) removal reported by Leles et al [16]. According to that report, the variation in reduction capacity decreased with increasing Cr(VI) concentration [16].…”

Section: Response Surface Plotssupporting

confidence: 91%

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Enhancing the Hexavalent Chromium Bioremediation Potential of Acinetobacter junii VITSUKMW2 Using Statistical Design Experiments

Pulimi

Jamwal²,

Samuel³

et al. 2012

J. Microbiol. Biotechnol.

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The Cr(VI) removal capability of Acinetobacter junii VITSUKMW2 isolated from the Sukinda chromite mine site was evaluated and enhanced using statistical design techniques. The removal capacity was evaluated at different pH values (5-11) and temperatures (30-40 o C) and with various carbon and nitrogen sources. Plackett-Burman design was used to select the operational parameters for bioremediation of Cr(VI). Three parameters (molasses, yeast extract, and Cr(VI) concentration) were chosen for further optimization using central composite design. The optimal combination of parameters was found to be 14.85 g/l molasses, 4.72 g/l yeast extract, and 54 mg/l initial Cr(VI), with 99.95% removal of Cr(VI) in 12 h. A. junii VITSUKMW2 was shown to have significant potential for removal of Cr(VI).

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Section: Response Surface Plotssupporting

confidence: 91%

“…The increase in reduction capacity with glucose and molasses was probably due to an increase in metabolic activity. It has been found that chromium transport into the bacterial cell depends on energy; therefore, it is glucose dependent [16].…”

Section: Effects Of Carbon Sourcesmentioning

confidence: 99%

Enhancing the Hexavalent Chromium Bioremediation Potential of Acinetobacter junii VITSUKMW2 Using Statistical Design Experiments

Pulimi

Jamwal²,

Samuel³

et al. 2012

J. Microbiol. Biotechnol.

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“…Em pesquisas desenvolvidas na Faculdade de Engenharia Química da Universidade Federal de Uberlândia, utilizando meios sintéticos simulando um efluente de curtume, foi utilizada aplicação de campo magnético em micro-organismos de culturas mistas para redução de Cr(VI) a Cr(III) (Dalcin et al, 2011, Leles et al, 2012, Moura, 2012.…”

Section: Introductionunclassified

Aplicação De Campo Magnético Em Cultura Mista

Filho¹,

Dias²,

Cardoso³

et al. 2015

Anais Do Congresso Brasileiro De Engenharia Química Em Iniciação Científica - Cobeq IC 2015

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RESUMO -A aplicação de campo magnético em micro-organismos de cultura mista vem sendo utilizada em pesquisas para tratamento de efluentes. Este trabalho utilizou uma cultura mista que já vem sendo estudada no laboratório e adaptada em meio sintético simulando um efluente de curtume. Avaliou-se o comportamento dos micro-organismos presentes nesta cultura durante a aplicação de campo magnético permanente em biorreator com operação em reciclo durante 8 horas de processo e 2:30 h de aplicação de campo. Os resultados da contagem de células viáveis indicaram que os experimentos com e sem a aplicação do campo permaneceram na mesma ordem de grandeza de 10 12 (UFC/mL).

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“…Studies have shown that certain bacterial species are capable of transforming hexavalent chromium (VI) into a valence with less toxicity, such as chromium (III) . The processes by which the microorganisms interact with toxic metals to allow for their removal or recovery include the following: bioaccumulation, biosorption, and enzymatic reduction .…”

Section: Introductionmentioning

confidence: 99%

Influence of an electromagnetic field on the bioreduction of chromium (VI) using a mixed culture of microorganisms

Moura

Terra

Borges

et al. 2014

Env Prog and Sustain Energy

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In this study, the bioreduction of chromium (VI) and Chemical Oxygen Demand (COD) were obtained using a mixed culture of microorganisms originating from the tannery industry. The influence of an electromagnetic field on the reduction of chromium (VI), together with the removal of COD and total chromium, were evaluated. Batch reactors were used, one in the presence of an electromagnetic field and another without exposure to the field. The bioreduction was conducted with various initial concentrations of chromium (VI) (50, 100, 150, and 200 mg L−1) at different electromagnetic field frequencies (1, 2, 5, and 10 Hz) with different initial volumes of the effluent (300, 500, and 1000 mL). Using an initial concentration of chromium (VI) of 100 mg L−1 in 500 mL of effluent at a frequency of 5 Hz, the maximum chromium (VI) bioreduction was 100% after 8 h, but the total removal of chromium was 38%. Using the same conditions but with a volume of 1000 mL, the same reduction of chromium (VI) was achieved, but there was a need for a longer processing time, ∼14 h. When using concentrations above 100 mg L−1, the same efficiency for the bioreduction of chromium (VI) was not obtained relative to the experiments performed without the presence of an electromagnetic field. The concentration of cells in both reactors remained almost constant over time, except when a frequency higher than 5 Hz was used, where we could observe the occurrence of cell death. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 88–98, 2015

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Evaluation of the bioremoval of Cr(VI) and TOC in biofilters under continuous operation using response surface methodology

Cited by 8 publications

References 46 publications

Enhancing the Hexavalent Chromium Bioremediation Potential of Acinetobacter junii VITSUKMW2 Using Statistical Design Experiments

Enhancing the Hexavalent Chromium Bioremediation Potential of Acinetobacter junii VITSUKMW2 Using Statistical Design Experiments

Aplicação De Campo Magnético Em Cultura Mista

Influence of an electromagnetic field on the bioreduction of chromium (VI) using a mixed culture of microorganisms

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