Fig. 5. Effect of initial COD and BOD concentration on percentage COD
and percentage BOD reduction by commercial activated carbon and
mixed adsorbent carbon. Treatment time: for CAC 180 min and for MAC
150 min; adsorbent dose for CAC 40 g/l and MAC 35 g/l, pH for CAC is 2
and for MAC is 7, agitation speed: 600 rpm, adsorbent particle size
6 2.8 mm.