Studies have been carried out on the removal of copper, cadmium and lead ions from synthetic chloride solutions using modified Indian Shorea Robusta (SR) bark species. Increase of solution pH systematically increases the percentage removal of metal ions. However, the treated solutions are brown colored. On the other hand, the chemically modified bark's efficiency for removal of metal ions is systematically higher than that of the raw ones at any given pH. Kinetics of metal ions removal indicates that about 1 h reaction time is quite adequate to achieve equilibrium removal.
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