Figure 2

Morphology and element analyses. (a) SEM of the activated sludge without Cr(VI); (b) SEM of the activated sludge with Cr(VI); (c) EDS for the sludge with Cr(VI); (d) TEM of the activated sludge without Cr(VI); (e) TEM of the activated sludge with Cr(VI); (f) and (g) EDS for the TEM outside and inside of cell with Cr(VI), respectively. Samples were taken at Day 10 and Day 130.