Ion Transport and Permeability in an Allophanic Andisol at Low pH

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概要

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• Allophanic Andisols have a significant pH-dependent charge. The positive charge increases and the negative charge decreases as pH decreases; therefore, anion movement becomes slower and cation movement becomes faster as pH decreases in the soil. At low pH, soil dispersion occurs easily due to electric repulsive force. The permeability of the soil then decreases because of structural changes that occur when dilute HCl or HNO_3 is percolated in the soil. However, soil permeability does not decrease when dilute H_2SO_4 is percolated in the soil. This is because SO_4^<2-> strongly adsorbs on the soil surface at low pH and the soil remains flocculated.

• 一般社団法人日本土壌肥料学会の論文

著者

• Ishiguro Munehide

  Faculty Of Environmental Science And Technology Okayama University

関連論文

• Effect of Sulfate on Nitrate Transport in Volcanic Ash Soils Sampled from the A and the B Horizons (Soil Physics)
• Ion Transport and Permeability in an Allophanic Andisol at Low pH

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