Adsorbing colloid flotation (ACF) possesses many distinct advantages for removing heavy metal ions from wastewater, but it is not much used for wastewater treatment because its separation efficiency is very poor for solutions with high concentrations of electrolyte. We demonstrate that this drawback can be eliminated by using polyaluminum chloride (PAC) as a coagulant. ACF with PAC was also tested for the removal of heavy metals from the wastewaters of a tannery and of an electroplating factory. ACF is shown to be a very promising technique for the removal of heavy metal ions from wastewater.