“…These adsorbents are abundant and relatively cheap. These adsorbents have been used in the adsorptive removal of heavy metals such as maize cob and husk (Igwe and Abia, 2003;Igwe, et al, 2005b), sunflower stalks (Gang and Weixing, 1998), chemically modified and unmodified cassava waste biomass , sawdust (Igwe, et al, 2006), bacterial algal Holan, 1995, Figurerira, et al, 2000), fungal biomass (Guibal, et al, 1992), chitosan and N-carboxymethyl chitosan (Guibal, et al, 1998;Ngah and Liang, 1998), Pillared clay (Vinod and Anirudhan, 2001), sago waste (Quek, et al, 1998), banana pith (Low, et al, 1995), sawdust (Raji and Anirudhan, 1997), Medicago sativa (Alfalfa) (Gardea-Torresdey, et al, 1998), spagnum peat moss (Ho, et al, 1995) and so on. In the present study, the kinetics of sorption of Hg (II) As (III) and Pb (II) onto modified and unmodified coconut fiber was studied at th e optimum pH 7.5 and the temperature 30 ÂșC.…”