Figure 14

Response surface methodology of % removal of MB using activated carbon from Raphanus seeds residual: (A) time (min)/pH, (B) effect of concentration of MB (ppm)/pH, (C) adsorbent dose (g/250 ml)/ pH, (D) effect of concentration of MB (ppm)/time(min), (E) adsorbent dose (g/250 ml)/time (min), (F) adsorbent dose (g/250 ml)/concentration of MB (ppm).