Biosorption of lead and chromium bypenicilliumpreparations

✍ Scribed by S. Siegel; P. Keller; M. Galun; H. Lehr; B. Siegel; E. Galun

• Publisher: Springer Netherlands
• Year: 1986
• Tongue: English
• Weight: 267 KB
• Volume: 27
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00464770

✦ Synopsis

Penicillium sp. mycelium can accumulate Pb from aqueous solutions of nitrate. Uptake of Pb by mycelial preparations after heat treatment was more rapid, but the maximum quantity bound remained unchanged. Chromium was not accumulated from solutions of potassium dichromate unless the mycelial preparation was first incubated in Pb nitrate. In the example given, 0.14 g of dry mycelium incubated in Pb nitrate (50 ppm, 2 hr) contained 850 pg of Pb and subsequently accumulated 120 ~tg of Cr in 5 min from 20 mL of 20 ppm dichromate solution.

We suggest that the binding of divalent Pb cations to negative fungal wall sites reverses their charge, enabling them to accumulate Cr anions.