The practical use of chitosan is limited due to the relatively high costs of constructing a treatment system for chitosan alone (Wan et al. 2004). Chitosan is soft and has a tendency to agglomerate or form a gel in aqueous solutions, therefore, it is necessary to provide physical support and increase the accessibility of the functional groups for metal binding (Nomanbhay and Palanisamy 2005). One option is to coat sand with chitosan (Wan et al. 2004), although the economics and practicalities of achieving this have yet to be determined.