Effects of Graphene on Bacterial Community Diversity and Soil Environments of Haplic Cambisols in Northeast China

摘要: Graphene is the thinnest and toughest two-dimensional nanomaterial yet discovered. However, it inevitably enters biosphere, where may pose potential risks to ecosystems. We investigated impact of applied graphene concentrations on bacterial community diversity, physicochemical properties, enzyme activities Haplic Cambisols, zonal soil Northeastern China. Soils receiving 0, 10, 100, or 1000 mg kg−1 were incubated for 7, 15, 30, 60, 90 days. Adding significantly increased richness diversity index in as well their abundances, but this varied with concentration incubation time. Compared 0 applied, bacteria abundance during early stages (i.e., 7 15 days) under different graphene, was inhibited remained unchanged by a longer time, reaching minima at 60 days then following an upward trend. treatments influenced structure metabolic function community’s regulation mechanism both time concentration. The rank order similarity soils treated > 30 Throughout periods, except few unidentified bacteria, relative abundances Proteobacteria Acidobacteria samples highest, number Pseudomonas being particularly large. phylum level Cambisols also affecting several key environmental factors, such organic matter hydrolytic nitrogen contents, urease catalase activities.