REMOVAL OF Cu~(2+), Pb~(2+) and Zn~(2+) FROM AQUEOUS SOLUTIONS ON DIATOMITE VIA ADSORPTION IN FIXED BED

摘要

Adsorption of heavy metal ions from wastewater on untreated diatomite was studied. The effect of particle size of the adsorbent (4.76, 3.15 and 2.00 mm) on adsorption efficiency of Cu~(2+), Pb~(2+) and Zn~(2+) in a ternary, continuous system at constant temperature was investigated. Adsorption capacity was increased with decreasing particle size, and the adsorption order was Cu~(2+) > Pb~(2+) > Zn~(2+) with the 2.00 mm particle adsorbent.