Equilibrium and kinetics studies of metal ion adsorption on dyed coconut pollens

Batch equilibration studies were conducted to determine the nature of adsorption of Zn (II) and Cu (II) onto dyed coconut pollens. The nature of adsorption of metal ions was explained using the Langmuir equation. The calculated values of equilibrium parameter indicated favourable adsorption by the adsorbents. Also the calculated values of fractional attainment of equilibrium , the intraparticle diffusion rate constant, Ka show that adsorption of metal ions is particle diffusion controlled. The adsorbent produced from coconut fibre can be used to remove heavy metals from aqueous solution with high efficiency.