Strategies for Lime Treatment Of D-Area Coal Storage Area (484-17D) Vadose Zone Soil [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 484. [Unassigned]
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Department of Energy. Office of Environmental Restoration and Waste Management ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2018
• Mô tả vật lý: Size: 21 p. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 267983
• Chủ đề: 1. 01 coal, lignite, and peat

Tóm tắt

Sixty years of coal storage operations in the DCSA (484-17D, Figure 1) have resulted in vadose zone soils with a total acidity level typical of acid mine drainage soils. Field measurements from June 2018 show soil pH values ranging from 3 to 4.5 to water-table depth (10 to 12 feet). Best estimates for treatment of the acidic soils with dolomitic (agricultural) limestone suggest a required application rate ranging from 8 to 10 tons per acre per foot of soil depth to raise the soil pH from 3.5 to 5.5. The model predicts a lower bound of 3 tons per acre per foot for high-quality limestone with a particle size less than 60-mesh and an upper bound of 19 tons per acre per foot for lower-quality limestone. This compares to typical residential and agricultural lime application rates of one to four tons per acre per foot of depth.