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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

Removal of Chromium (VI) in industrial wastes incubated with the fungal biomass. 100 rpm, 28°C, pH 4.0,  50 g of contaminated soil (50 mg Cr (VI)/g soil).
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Related In: Results  -  Collection


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fig7: Removal of Chromium (VI) in industrial wastes incubated with the fungal biomass. 100 rpm, 28°C, pH 4.0, 50 g of contaminated soil (50 mg Cr (VI)/g soil).

Mentions: We adapted a water-phase bioremediation assay to explore possible usefulness of strain of Paecilomyces sp., for eliminating Cr (VI) from industrial wastes, the mycelium biomass was incubated with nonsterilized contaminated soil containing 50 mg Cr (VI)/g, suspended in LMM, pH 4.0. It was observed that after eight days of incubation with the Paecilomyces sp. biomass, the Cr (VI) concentration of soil sample decreased fully (Figure 7), and the decreased level occurred without significant change in total Cr content, during the experiments. In the experiment carried out in the absence of the fungal strain, the Cr (VI) concentration of the soil samples decreased by about of 18% (date not shown); this might be caused by indigenous microflora and (or) reducing components present in the soil. The chromium removal abilities of Paecilomyces sp. are equal or better than those of other reported strains, for example, Candida maltose RR1 [12]. In particular, this strain was superior to the other strains because it has the capacity for efficient chromium reduction under acidic conditions. Most other Cr (VI) reduction studies were carried out at neutral pH [14, 15]. Aspergillus niger also has the ability to reduce and adsorb Cr (VI) [14]. When the initial concentration of Cr (VI) was 500 ppm, A. niger mycelium removed 8.9 mg of chromium/g dry weight of mycelium in 7 days. In the present study, Paecilomyces sp., remove 50 mg/g, (pH, 4.0 and 8 days).


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

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

Removal of Chromium (VI) in industrial wastes incubated with the fungal biomass. 100 rpm, 28°C, pH 4.0,  50 g of contaminated soil (50 mg Cr (VI)/g soil).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig7: Removal of Chromium (VI) in industrial wastes incubated with the fungal biomass. 100 rpm, 28°C, pH 4.0, 50 g of contaminated soil (50 mg Cr (VI)/g soil).
Mentions: We adapted a water-phase bioremediation assay to explore possible usefulness of strain of Paecilomyces sp., for eliminating Cr (VI) from industrial wastes, the mycelium biomass was incubated with nonsterilized contaminated soil containing 50 mg Cr (VI)/g, suspended in LMM, pH 4.0. It was observed that after eight days of incubation with the Paecilomyces sp. biomass, the Cr (VI) concentration of soil sample decreased fully (Figure 7), and the decreased level occurred without significant change in total Cr content, during the experiments. In the experiment carried out in the absence of the fungal strain, the Cr (VI) concentration of the soil samples decreased by about of 18% (date not shown); this might be caused by indigenous microflora and (or) reducing components present in the soil. The chromium removal abilities of Paecilomyces sp. are equal or better than those of other reported strains, for example, Candida maltose RR1 [12]. In particular, this strain was superior to the other strains because it has the capacity for efficient chromium reduction under acidic conditions. Most other Cr (VI) reduction studies were carried out at neutral pH [14, 15]. Aspergillus niger also has the ability to reduce and adsorb Cr (VI) [14]. When the initial concentration of Cr (VI) was 500 ppm, A. niger mycelium removed 8.9 mg of chromium/g dry weight of mycelium in 7 days. In the present study, Paecilomyces sp., remove 50 mg/g, (pH, 4.0 and 8 days).

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