Figure 2
Optical images of Phragmites australis root cross-section. (a) Sample 1-1 collected at Site 1. (b) Sample 2-1 collected at Site 2. The thickness of the cross sections is 50 µm. These thin cross-section samples are prepared for synchrotron XRF measurement for metal concentrations and distributions. Areas in the frames are selected for synchrotron XRF measurement. |