“…Extensive literature has been reported regarding dye removal from aqueous solutions by using a myriad of adsorbents derived from clay minerals (Khan et al, 2004), activated carbon (Annadurai et al, 2001;Pelekani and Snoeyink, 2000;Ramuthai et al, 2009), coal (Mohan et al, 2002b), wood (Garg et al, 2003), carbon xerogels (Figueiredo et al, 2011), fly ash (Lin et al, 2008;Mohan et al, 2002a;Shaobin et al, 2005), and bio-materials (Debrassi and Rodrigues, 2011;Hii et al, 2009). However, owing to the lack of effective adsorbateeadsorbent interactions, which can be ascribed either to the relatively limited surface area or clogged "dead volume" in the pores of adsorbents, a number of the above mentioned materials are found to be sluggish for the adsorption of dyes.…”