Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China;
Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China;
Cd2+; pb2+; biofilms; dehydrogenase activity; polysaccharide content; integrated vertical-flow constructed wetland(IVCW);