The effect of pH on the removal f cadmium from aqueous solutionsby dry leaves has been studied. Reed leaves showed a high capabilityof cadmium adsorption at almost any pH. The adsorption wasparticularly high at pH 1. Cypress, oak and pine leaves showed loweradsorption of cadmium ions at low pH values and this adsorptionincreased steadily at higher pH values. Reed and oak leaves have beenfound more efficient for removing cadmium from aqueous solutions thancypress and pine leaves in acidic, neutral or basic media. Reed wasparticularly efficient at very low pH which makes it suitable forremoving cadmium from polluted water affected by acid rain. Almostall of the cadmium present in solutions having concentrations 10mg/Lwas removed by reed leaves within 24 hours.
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