Fig. 4: ATR-FTIR and XPS characterization of yeast biomass.
From: Lead removal at trace concentrations from water by inactive yeast cells
a Full ATR-FTIR spectrum of yeast cells. The black line represents control yeast cells (C0:0 ppb Pb2+); the blue and green lines represent yeast cells after biosorption with C0 of 100 and 1000 ppb Pb2+ respectively. b XPS analysis of yeast cells. From left to right: control cells, yeast cells after biosorption, C0 100 and 1000 ppb Pb2+. XPS peak assignments are as follows: light green C=O; magenta: O-C=O; purple: C-N; dark green: C-C.
