Phragmites karka as a Biosorbent for the Removal of Mercury Metal Ions from Aqueous Solution: Effect of Modification

Figure 9

(a) Freundlich adsorption isotherm for natural P. karka and treated P. karka. (b) Dubinin-Radushkevish (D-R) model fornatural P. karka and treated P. karka (concentration = 10–60 mg/L, time = 50 and 40 minutes for natural P. karka and treated p. karka, resp.,  K, agitation speed = 150 and 100 rpm natural P. karka and treated p. karka, resp., dose of biosorbent = 1 g/100 mL, and pH = 6 and 7 for natural P. karka and treated p. karka, resp.).

(a)

(b)