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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 226 Ra and a Ra removal efficiencies were 89.5-94.7% and 84.1-92.3%. And the removal efficiencies of SO 4 2-, 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.
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Zhang et al. (2015) studied this question.
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