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Ash prepared from calcinating rice hull at 500°C under 20mL air/s for 50min was used to remove copper (II) ion from aqueous solution. The rice hull ash (RHA) thus produced was found to be efficient in removing copper (II) ion from aqueous solution. The kinetic study of the adsorption experiment indicated that both the rate of removal and the removal at equilibrium were increased with decreasing RHA...
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