Application of a Manganese Ore Constructed Wetland for Radium Removal from Lead-Zinc Mine Water

摘要

To remedy the radium (Ra) in lead-zinc mine water, a laboratory-scale horizontal subsurface flow constructed wetland was designed. In lab-scale wetlands, a manganese ore constructed wetland was proven to be a feasible treatment technology for Ra removal. The results showed that with the influent flow loading rate of 0.096 m/d, after the treatment of manganese ore constructed wetlands (CWs), the Ra-226 and Ra-a removal efficiencies were 89.5-94.7% and 84.1-92.3%. And the removal efficiencies of SO42-, Zn, Pb, Cu, Cd, As, Fe, and Mn were 65.4%, 93.7%, 88.5%, 86.2%, 82.4%, 76.3%, 98.3%, and 97.8%, respectively.