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.

Utilizing land cover change (LCC) information together with MODIS land surface temperature in Jing-Jin-Ji area in 2000, 2005 and 2010, spatiotemporal difference of urban heat island (UHI) effects and the factors influenced UHI is explored. Results reveal that the seasonal fluctuations of daytime UHI is bigger than that of nighttime UHI. More than 92.8% of the urban have UHI in the nighttime every season. The strongest daytime UHI happens in summer, but more than 85% of the cities have urban cooling effect in winter. The nighttime UHI in different seasons appear to be similar. The water in urban has different influence to UHI in daytime and nighttime which is to weaken the UHI and to enhance the UHI. The grass in urban enhance the UHI in the daytime of spring and summer and in the nighttime of all seasons but weaken the UHI in the daytime of winter. The forest and the crop land in the urban have the same effect which are weaken the UHI in the daytime of spring, summer and autumn and in the nighttime of all seasons but enhance the UHI in the daytime of winter.