Removal of chromium (VI) in a chromate-resistant strain of paecilomyces sp [Remoción de Cromo (VI) por una cepa de paecilomyces sp resistente a cromato]
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abstract
The ability to reduce chromium (VI) by a fungal strain of Paecilomyces sp was studied. When it was incubated in minimal medium with glucose and other inexpensive commercial carbon sources such as unrefined and brown sugar or glycerol, in the presence of 50 mg/L of Cr(VI), the strain caused complete removal of Cr(VI). The reduction to Cr (III) occurs in the growth medium after 7 days of incubation, at 28°C, pH 4.0, and inoculum of 38 mg. Also, the fungi efficiently reduced the concentration of Cr(VI) from contaminated soil wastes. The results indicate that the fungal strain of Paecilomyces sp has the capacity of reducing Cr(VI) to Cr(III), and therefore it could be useful for the removal of Cr(VI) pollution.
