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- W2183689070 abstract "Coal wastes are the mineral matter rejected from coal during cleaning operations. The refuse consists mainly of shale, clay, pyrite, and waste coal. At many disposal sites in Illinois, considerable quantities of sediment, acidity, sulphate, and dissolved metals have been washed from these sites and have contributed to the degradation in quality of the receiving streams. Hydrologic and water-quality data were gathered from three abandoned, unreclaimed, coal-waste disposal sites in southwestern Illinois. Two of the disposal sites were recontoured, limed, covered with 30 cm of glacial till and loess, fertilized, and seeded. Data collected one to two years after renovation of these sites indicated that: (1) runoff rates were significantly increased because the soil cover was less permeable than the coal waste; (2) peak runoff rates did not seem to be affected; and (3) acidity, sulphate, and metal concentrations in surface runoff waters were reduced by about 80-90% following reclamation. However, gradual increases in acidity, sulphate, and metal concentrations in runoff water at the Staunton site have occurred two years after reclamation and may continue to rise in the future. This indicates that the pyrite and iron sulphate salts contained in the coal Nastes will make reclamation a gradual long-term process -- one that cannot be solved immediately by grading, liming, and covering with soil." @default.
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- W2183689070 date "2006-01-01" @default.
- W2183689070 modified "2023-09-27" @default.
- W2183689070 title "WASTE DISPOSAL SITES IN SOUTHWgSTERN ILLINOIS" @default.
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