摘要 : Disposal of dredged sediment from rivers and lakes is an important environmental management issue. Reuse of amended dredged sediment as planting medium for urban greening (PMUG) is a potentially valuable resource management approa... 展开 Disposal of dredged sediment from rivers and lakes is an important environmental management issue. Reuse of amended dredged sediment as planting medium for urban greening (PMUG) is a potentially valuable resource management approach. However, risks associated with heavy metals in dredged sediment, as well as its poor permeability and water retention capacity, limit its potential for reuse. In this study, we used dredged sediment to prepare PMUG by alternating aerobic and anaerobic processes, using dredged sediment from Chaohu Lake (China) as raw material. Straw, peat, and biochar were added as auxiliary materials and zeolite and superabsorbent resin as water-retaining agents. Changes in physical and chemical indices of the amended sediment were determined during planting medium preparation. Compared with the original dredged sediments, the addition of straw significantly increased the organic matter, nitrogen, and phosphorus content ( p < 0.05). The resulting pH, conductivity, cation exchange capacity, available phosphorus, and available nitrogen of the amended sediments met Standard CJ/T 340-2016, China. The added materials also effectively stabilized the heavy metals in the sediments; the immobilization rates of Cr, Ni, Zn, As, Cd, Pb, Hg, and Cu in the amended sediments were 73–84%, 38–55%, 61–62%, 66–76%, 73–77%, 75–86%, 73–90%, and 43–51%. The addition of peat also significantly increased seed germination. The seed germination index of the amended sediments was >119%, ranging up to 173%. This study provides guidance for preparation of amended dredged sediments for use in urban greening. 收起