SIMULATION EXPERIMENT ON DISSOLUTION OF CALCITE BY CITRIC AND ITS KARST IMPORTANCE
Abstract：The simulation experiment of calcite grains eroded by citric was carried out. The calcite was ground into grains with the diameter 0.15～0.25mm. Labile calcium in the soil and limestone powders on the interface of soil-rock were taken into account, therefore, the fresh calcite grains were not washed. The concentrations of citric solutions were 10mg/l, 50mg/l, and 100mg/l respectively. The results showed that the amount of released calcium from calcite increased in logarithm. High contents of citric solution could result in more calcite dissolution.The amount of released calcium from the calcite in 10mg/l, 50mg/l, 100mg/l citric solutions was 1.77, 4.25, 5.03 times as much as that in deionized water respectively. The dissolution amount of 100mg/l citric was matched with those of 10×10-2 atm CO2 and 50mg/l citric+5×10-2 atm CO2. Consequently, organic acid is one of the important driving forces in karst dynamic systems.
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Publication Date：2001-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-4 )