My master project is to study the competitive adsorption of four types of heavy metals by a synthetic adsorber, and It is important for me to investigate a case as realistic as possible. So I want to choose four toxic metals that find together in real wastewater samples of activities like mining, mineral extraction, metal forming and the like. I'll be so happy if you share your information with me about the coexistence of heavy metal ions in wastewater of large industries and the current references on this subject.
Regards
M. Keyhani