Figure 4

The proportions of live and dead cells in sludge samples incubated for 96 hours with (a) 100 mg Hg/L, (b) 100 mg Pb/L, and (c) metal-free wastewaters.
The proportions of live and dead cells in sludge samples incubated for 96 hours with (a) 100 mg Hg/L, (b) 100 mg Pb/L, and (c) metal-free wastewaters.