Sorptive removal of Nickel and Zinc ions from aqueous waste solutions by bag's pith

Sugar cane bagasse pith (BP), was used as a sorbent material for removal of Zn and Ni ions from aqueous waste solutions. The effect of certain factors; shaking time, sorbent mass, Ph, and presence of certain inorganic ions on the adsorption capacity was evaluated. The obtained results was discussed in the light of the two parameter equilibrium model (Freundlich equation). And it was found that the exponent 1/n is in the range, 1> 1/n >0, which signify that strong adsorptive forces are operative on the surface of sugar cane bagasse pith (BP). Dynamic studies showed that the lagergren equation is applicable. The boundary layer thickness in case of Zn(II) is greater than Ni(II) in spite of they have the same equilibrium time (120 min.). This was confirmed by evaluating the intra particle diffusion rate constant kP. The diverse ions proved that, not only the kind but also the amount of ions influence the adsorption capacity of the tested metal ions. the use of biomass sorbent (BP) was recommended for the radioactive and industrial water treatment, recovery and reuse these metal ions