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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

The effect of cell concentration on the removal of Cr (VI). 50 mg/L Cr (VI). 100 rpm, 28°C, pH 1.0.
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Related In: Results  -  Collection


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fig3: The effect of cell concentration on the removal of Cr (VI). 50 mg/L Cr (VI). 100 rpm, 28°C, pH 1.0.

Mentions: The influence biomass in the removal capacity of Cr (VI) was depicted in Figure 3. From the analyzed 38, 76, and 114 mg of dry weight the removal capacity was in the order of 99.17%, 97.95%, and 97.25%, respectively. In contrast to our observations, most of the reports in the literature observe at higher biomass dose resulting in an increase in the percentage removal [1, 3, 7, 8, 18, 21]. The higher the biomass dose, the more binding sites for complex of Cr (VI) (e.g., HCrO4− and Cr2O7−2 ions) [3, 9]. However, it did not show in our observations.


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

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

The effect of cell concentration on the removal of Cr (VI). 50 mg/L Cr (VI). 100 rpm, 28°C, pH 1.0.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: The effect of cell concentration on the removal of Cr (VI). 50 mg/L Cr (VI). 100 rpm, 28°C, pH 1.0.
Mentions: The influence biomass in the removal capacity of Cr (VI) was depicted in Figure 3. From the analyzed 38, 76, and 114 mg of dry weight the removal capacity was in the order of 99.17%, 97.95%, and 97.25%, respectively. In contrast to our observations, most of the reports in the literature observe at higher biomass dose resulting in an increase in the percentage removal [1, 3, 7, 8, 18, 21]. The higher the biomass dose, the more binding sites for complex of Cr (VI) (e.g., HCrO4− and Cr2O7−2 ions) [3, 9]. However, it did not show in our observations.

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