Equillibrium and kinetics of metal ion adsorption onto a commercial H-type granular activated carbon: Experimental and modeling studies

摘要

Systematic studies on metal ion adsorption equilibrium and kinetics by a commercial H-type granular activated carbon were carried out. Titration of the carbon showed that the surface charge density decreased with an increasing pH. Higher copper adsorption was obtained with increasing solution pH and ionic strength. Metal removal was in the descending order: Cu~2+>Zn~2+=Co~2+. Copper removal was not affected by addition of zinc or cobalt, while copper can reduce both zinc and cobalt removal.