Fig. 3

Removal of Hg by P. aeruginosa FZ-2 at different salinity levels. The error bar indicates the standard deviation with three replicates. The A-B-C symbols show significant differences at p < 0.05 at different salinity levels for the same contact times. The a-b-c symbols present significant differences at p < 0.05 for various contact times at the same salinity level. The α-β symbols show significant differences at p < 0.05 between the control and treated reactors