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Natural Bioaccumulation of Heavy Metals onto Common Edible Macrofungi and Equilibrium and Kinetic Studies on Biosorption of Pb(Ⅱ) to Them
Yuan JIANG, Ruixia HAO, Shiqin YANG
Acta Scientiarum Naturalium Universitatis Pekinensis    2017, 53 (1): 125-134.   DOI: 10.13209/j.0479-8023.2017.003
Abstract879)   HTML10)    PDF(pc) (824KB)(510)       Save

Natural bioaccumulation of heavy metals and biosorption of Pb (Ⅱ) in some common edible macro-fungi was studied. They include the following species: Pleurotus ostreatus, Tricholomagambosum, Auricularia auricular, and Hypsizygus marmoreus Bigelow. The present analysis of heavy metals (Pb, Mn, Co, Ni, Cr, Zn, Fe, Cd, V, and Cu) revealed distinct capabilities of metal accumulation among individual species. The concentrations of the metals have not reached a health risk level when cultivated in uncontaminated soil. The biosorption experiment by edible-macro-fungi shows that the equilibrium data of living sporocarp of Auricularia auricular and the homogenate of all the species follow well the Langmuir model; living sporocarp of Pleurotus ostreatus exhibites better fit to the Freundlich model. The maximum lead removal capacity of Pleurotus ostreatus, Tricholomagambosum, Auricularia auricular, Hypsizygus marmoreus Bigelow show a higher lead removal capacity than other biosorbents, reaching 91.7, 123, 58.5 and 120 mg/g respectively. The pseudo-second-order kinetics model best fits the biosorption processes. The effectiveness of edible macro-fungi as a potential biosorbent for Pb(Ⅱ) is confirmed.

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