Abstract
This paper discussed the effect of ferrate preoxidation on enhanced removal of cadmium and lead from water in the process of coagulation. Some factors affecting the removal of heavy metals were discussed such as pH value, the dosage of ferrate and the water quality condition etc. The results showed that ferrate preoxidation could effectively increase the removal efficiency of lead, whilst a little increase of removal efficiency of cadmium; the removal efficiency increased with the increase of pH. The presence of humic acid greatly affected the removal efficiency of lead in the process of coagulation, but hardly affected the removal efficiency of cadmium. The combined effect of adsorption by intermediate iron species formed in the process of ferrate oxidation and the enhanced coagulation of iron colloids co-precipitated with heavy metals might be responsible for the effective removal of heavy metals.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
