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- W1996948151 abstract "In southern China revegetation and ecological restoration of many abandoned Mn tailings has become a major concern. To determine the major constraints for plant establishment and evaluate the feasibility of remediation, a comparative study was conducted on Mn tailings and rhizosphere soils at the boundary of the tailings pond. Both tailings and rhizosphere soils had neutral to slightly alkaline pH and normal electrical conductivity. They were both enriched with organic matter (6.8–9.2%), total N (1.77–5.94 g kg−1), available P (41.78–73.83 mg kg−1) and K (146.7–906.9 mg kg−1), suggesting the tailings were a nutrient rich substrate for revegetation. Mn tailings were clay textured, while rhizosphere soils were silty loam or clay loam. The compaction and anoxic nature of Mn tailings were considered to be the major constraints for plant establishment. Total Mn (31903 mg kg−1), Cd (119 mg kg−1), Cu (126 mg kg−1) and Zn (2490 mg kg−1) in tailings were all at phytotoxic levels, but did not differ significantly from those in rhizosphere soils. In both tailings and rhizosphere soils, percentages of water- and DTPA-extractable metals were less than 1% and 2% of the total metal pools, respectively. Sequential extraction revealed that the majority of Mn, Cu and Zn were associated with the residual fraction, while the majority of Cd occurred as Fe–Mn oxides. The natural succession of plants around Mn tailings formed a distinctive metal-tolerant plant community, mainly comprising nine species such as Cynodon dactylon and Humulus scandens and so on. All species studied could be good candidates for revegetation of Mn tailings." @default.
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- W1996948151 date "2008-07-01" @default.
- W1996948151 modified "2023-10-10" @default.
- W1996948151 title "Pedological characteristics of Mn mine tailings and metal accumulation by native plants" @default.
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- W1996948151 doi "https://doi.org/10.1016/j.chemosphere.2008.05.001" @default.
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