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Hexavalent Chromium Removal by a Paecilomyces sp. Fungal Strain Isolated from Environment.

Cárdenas-González JF, Acosta-Rodríguez I - Bioinorg Chem Appl (2010)

Bottom Line: A resistant and capable fungal strain in removing hexavalent chromium was isolated from an environment near of Chemical Science Faculty, located in the city of San Luis Potosí, Mexico.Strain resistance of the strain to high Cr (VI) concentrations and its ability to reduce chromium were studied.When it was incubated in minimal medium with glucose, another inexpensive commercial carbon source like unrefined and brown sugar or glycerol, in the presence of 50 mg/L of Cr (VI), the strain caused complete disappearance of Cr (VI), with the concomitant production of Cr (III) in the growth medium after 7 days of incubation, at 28 degrees C, pH 4.0, 100 rpm, and an inoculum of 38 mg of dry weight.

View Article: PubMed Central - PubMed

Affiliation: Laboratorio de Micología Experimental, Centro de Investigación y de Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Avenue Dr. Manuel Nava No. 6, Zona Universitaria, 78320 San Luis Potosí, SLP, Mexico.

ABSTRACT
A resistant and capable fungal strain in removing hexavalent chromium was isolated from an environment near of Chemical Science Faculty, located in the city of San Luis Potosí, Mexico. The strain was identified as Paecilomyces sp., by macro- and microscopic characteristics. Strain resistance of the strain to high Cr (VI) concentrations and its ability to reduce chromium were studied. When it was incubated in minimal medium with glucose, another inexpensive commercial carbon source like unrefined and brown sugar or glycerol, in the presence of 50 mg/L of Cr (VI), the strain caused complete disappearance of Cr (VI), with the concomitant production of Cr (III) in the growth medium after 7 days of incubation, at 28 degrees C, pH 4.0, 100 rpm, and an inoculum of 38 mg of dry weight. Decrease of Cr (VI) levels from industrial wastes was also induced by Paecilomyces biomass. These results indicate that reducing capacity of chromate resistant filamentous fungus Cr (VI) could be useful for the removal of Cr (VI) pollution.

No MeSH data available.


Related in: MedlinePlus

Influence of carbon source on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the  growth medium. 100 rpm, 28°C, pH 4.0. Influence of commercial carbon sources and salt on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the growth medium. 100 rpm, 28°C, pH 4.0.
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Related In: Results  -  Collection


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fig5: Influence of carbon source on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the growth medium. 100 rpm, 28°C, pH 4.0. Influence of commercial carbon sources and salt on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the growth medium. 100 rpm, 28°C, pH 4.0.

Mentions: Figures 5(a) and 5(b) show that the decrease of Cr (VI) level in culture medium of Paecilomyces sp. occurred exclusively in the presence of a carbon source, either fermentable (glucose sucrose, fructose, citrate) or oxidable (glycerol). In the presence of glucose, another inexpensive commercial carbon sources like unrefined sugar and brown sugar or glycerol, the decrease in Cr (VI) levels occurred at a similar rate, at 7 days of incubation, are of 99.17%, 100%, 94.28%, 81.5, and 99%, respectively, and the other carbon sugar were less effectives. On the other hand, incubation of the biomass in the absence of a carbon source did not produce any noticeable change in the initial Cr (VI) concentration in the growth medium. These observations indicated that in culture of the fungus a carbon source is required to provide the reducing power needed to decrease Cr (VI) in the growth medium. Our observations are like to the report of Acevedo Aguilar et al., Prasenjit and Sumathi [13, 24] with glucose like carbon source, and are different from the observations of Srivasta and Thakur [28] with Aspergillus sp, and Acinetobater sp, who observed how the main carbon source is the sodium acetate.


Hexavalent Chromium Removal by a Paecilomyces sp. Fungal Strain Isolated from Environment.

Cárdenas-González JF, Acosta-Rodríguez I - Bioinorg Chem Appl (2010)

Influence of carbon source on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the  growth medium. 100 rpm, 28°C, pH 4.0. Influence of commercial carbon sources and salt on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the growth medium. 100 rpm, 28°C, pH 4.0.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2902107&req=5

fig5: Influence of carbon source on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the growth medium. 100 rpm, 28°C, pH 4.0. Influence of commercial carbon sources and salt on the capability of Paecilomyces sp. to decrease Cr (VI) levels in the growth medium. 100 rpm, 28°C, pH 4.0.
Mentions: Figures 5(a) and 5(b) show that the decrease of Cr (VI) level in culture medium of Paecilomyces sp. occurred exclusively in the presence of a carbon source, either fermentable (glucose sucrose, fructose, citrate) or oxidable (glycerol). In the presence of glucose, another inexpensive commercial carbon sources like unrefined sugar and brown sugar or glycerol, the decrease in Cr (VI) levels occurred at a similar rate, at 7 days of incubation, are of 99.17%, 100%, 94.28%, 81.5, and 99%, respectively, and the other carbon sugar were less effectives. On the other hand, incubation of the biomass in the absence of a carbon source did not produce any noticeable change in the initial Cr (VI) concentration in the growth medium. These observations indicated that in culture of the fungus a carbon source is required to provide the reducing power needed to decrease Cr (VI) in the growth medium. Our observations are like to the report of Acevedo Aguilar et al., Prasenjit and Sumathi [13, 24] with glucose like carbon source, and are different from the observations of Srivasta and Thakur [28] with Aspergillus sp, and Acinetobater sp, who observed how the main carbon source is the sodium acetate.

Bottom Line: A resistant and capable fungal strain in removing hexavalent chromium was isolated from an environment near of Chemical Science Faculty, located in the city of San Luis Potosí, Mexico.Strain resistance of the strain to high Cr (VI) concentrations and its ability to reduce chromium were studied.When it was incubated in minimal medium with glucose, another inexpensive commercial carbon source like unrefined and brown sugar or glycerol, in the presence of 50 mg/L of Cr (VI), the strain caused complete disappearance of Cr (VI), with the concomitant production of Cr (III) in the growth medium after 7 days of incubation, at 28 degrees C, pH 4.0, 100 rpm, and an inoculum of 38 mg of dry weight.

View Article: PubMed Central - PubMed

Affiliation: Laboratorio de Micología Experimental, Centro de Investigación y de Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Avenue Dr. Manuel Nava No. 6, Zona Universitaria, 78320 San Luis Potosí, SLP, Mexico.

ABSTRACT
A resistant and capable fungal strain in removing hexavalent chromium was isolated from an environment near of Chemical Science Faculty, located in the city of San Luis Potosí, Mexico. The strain was identified as Paecilomyces sp., by macro- and microscopic characteristics. Strain resistance of the strain to high Cr (VI) concentrations and its ability to reduce chromium were studied. When it was incubated in minimal medium with glucose, another inexpensive commercial carbon source like unrefined and brown sugar or glycerol, in the presence of 50 mg/L of Cr (VI), the strain caused complete disappearance of Cr (VI), with the concomitant production of Cr (III) in the growth medium after 7 days of incubation, at 28 degrees C, pH 4.0, 100 rpm, and an inoculum of 38 mg of dry weight. Decrease of Cr (VI) levels from industrial wastes was also induced by Paecilomyces biomass. These results indicate that reducing capacity of chromate resistant filamentous fungus Cr (VI) could be useful for the removal of Cr (VI) pollution.

No MeSH data available.


Related in: MedlinePlus