Rapid industrialization and urbanization have
resulted in elevated emission of toxic heavy metals
entering the biosphere (Lu et al., 2004). Heavy metals,
industrial pollutants, in contrast with organic materials
cannot be degraded and therefore accumulate in water,
soil, bottom sediments and living organisms. Water
contamination with heavy metals is a very important
problem in the current world (Rai et al., 2002).
Considerable attention has been paid to methods for
metal removal from industrial wastewaters because
they pose serious environmental problems and are
dangerous to human health (Miretzky et al., 2006).
Heavy metal ions such as Cu2+, Zn2+, Fe2+ are essential
micronutrients for plant metabolism but when present
in excess, can become extremely toxic (Lu et al., 2004).