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- W4378449994 abstract "Dredging is one of the most effective methods for inhibiting the endogenous contamination of natural lakes. However, both the amount and the scope of dredging will be restricted if the disposal of the dredged sediment incurs considerable environmental and economic costs. The use of dredged sediments as a post-mining soil amendment for mine reclamation benefits both sustainable dredging and ecological restoration. This study incorporates a field planting experiment with a life cycle assessment to confirm the practical effectiveness of sediment disposal via mine reclamation, as well as its environmental and economic superiority over other alternative scenarios. The results show that the sediment offered plentiful organic matter and nitrogen for mine substrate, stimulating plant growth and increasing photosynthetic carbon fixation density, followed by enhanced plant root absorption and an improved soil immobilization effect on heavy metals. A 2:1 ratio of mine substrate to sediment is recommended to significantly promote the yield of ryegrass while reducing levels of groundwater pollution and soil contaminant accumulation. Due to the significant reduction in electricity and fuel, mine reclamation had minimal environmental impacts on global warming (2.63 × 10-2 kg CO2 eq./kg DS), fossil depletion (6.81 × 10-3 kg oil eq./DS), human toxicity (2.29 × 10-5 kg 1,4-DB eq/kg DS), photochemical oxidant formation (7.62 × 10-5 kg NOx eq./kg DS), and terrestrial acidification (6.69 × 10-5 kg SO2 eq./kg DS). Mine reclamation also had a lower cost (CNY 0.260/ kg DS) than cement production (CNY 0.965/kg DS) and unfired brick production (CNY 0.268/kg DS). The use of freshwater for irrigation and electricity for dehydration were the key factors in mine reclamation. Through this comprehensive evaluation, the disposal of dredged sediment for mine reclamation was verified to be both environmentally and economically feasible." @default.
- W4378449994 created "2023-05-27" @default.
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- W4378449994 date "2023-07-01" @default.
- W4378449994 modified "2023-10-14" @default.
- W4378449994 title "Beneficial use of dredged sediments as a resource for mine reclamation: A case study of Lake Dianchi’s management in China" @default.
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- W4378449994 doi "https://doi.org/10.1016/j.wasman.2023.05.010" @default.
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