Adsorption of Hg(II) from aqueous solution using thiourea functionalized chelating fiber

Scheme 2 shows the proposed chelation of Hg(II) with PP-g-AA-TU fiber. It may form stable chelating structure between Hg(II), -CONH and -C = S of chelating fiber. The adsorption of Hg(II) ions onto PP-g-AA-TU fiber may be considered to consist of two processes: the first is an instantaneous adsorption stage or external surface adsorption, and the second is a gradual adsorption stage in which intra-particle diffusion controls the adsorption rate until metal uptake reaches equilibrium.108