THE RELATIONSHIP BETWEEN pH VALUE AND MAGNETIC SUSCEPTIBILITY OF KUNMING RED LIMESTONE SOIL BY ACID- ALKALI DISPOSED
About the research of soil magnetic change mechanism, more and more evidences indicate the impact of pedogenesis. The physical and chemical properties of soil decided soil classification, rarely reported on he relationship between soil properties and magnetic susceptibility. Based on studied the red limestone soil Acid - Alkali disposed, try to analysis the relationship between soil pH and the Magnetic susceptibility. Our result indicate that the magnetic susceptibility of the soils changes from 3 000 -4 500 × 10^ -8m^3/kg before disposing and the pH value of the soil stays from 7 -8, belongs to alkaline soil. After disposing the soil samples with HCl, the magnetic susceptibility changes from 250 -4 000 × 10^-8m^3/kg and the pH value drops tol -4, the pH value and the magmefic susceptibility are positive correlation. After disposing the soil samples with NaOH, the magnetic susceptibility changes form 2 500 - 4 000 × 10^-8m^3/kg and the pH value rises to 8 - 13, the pH value and the magnetic susceptibility are negative correlation. The primary cause of the above phenomenon, Strong acid and alkali were brought to reduction and oxidation environment, changed the transformed direction between the weakly magnetic minerals and strong magnetic minerals, inhibited magnetic bacterial action, ultimately affect the changes of soil magnetic susceptibility.
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万方数据
维普
