Adsorption processes using natural adsorbents or agricultural
waste products are becoming the new alternative for
waste water treatment as they are cheap, simple, sludge-free,
and involve small initial cost (Matheickal and Yu 1997;
Chandra et al. 2003; Abdel-Ghani et al. 2007; Abdel-Ghani
and El-Chaghaby 2007, 2008).