Volume 17 Part 1 Article 80: Bioaccumulation of Heavy Metals and Enzymeactivities of Pleurotus ostreatus

Volume 17 Part 1 Article 80
Year 2008
Title: Bioaccumulation of Heavy Metals and Enzymeactivities of Pleurotus ostreatus
Authors: C.O. Adenipekun and O.M. Omoruyi


Soils collected from cement, black oil and battery polluted sites were incubated with Pleurotus ostreatus for a period of one month and two months. In the cement-polluted soil, there was a reduction in lead from 8.00ppm in the control sample to 6.00ppm after one month and after two months, the lead content was still 6.00ppm. Similar result was observed in nickel which reduced from 0.40ppm to 0.05ppm after one month and did not change after two months. In black oil polluted soil, after each incubation period, the value of lead, copper manganese and nickel reduced respectively while in battery polluted soil copper and manganese soil content decreased as the incubation period increased. The result of the enzyme activities showed a decrease in peroxidase activity in black-oil polluted soil from 42 to 39 while an increase was observed in the other soil samples with increase in incubation period from 27 to 43 for cement polluted soil and from 18 to 27 activity/minute in battery polluted soil and the highest polyphenol oxidase activity was also observed in black-oil polluted soil (62activity/minute). The study thus shows that P. ostreatus has the ability of accumulating heavy metals is related to its ability to produce enzymes.

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