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以腐殖酸为表面活性剂进行了脱硫石膏改良油污盐碱土壤的土柱实验,研究了不同洗盐条件下土壤渗透性能、电导率和pH值的变化规律。研究结果表明,油污显著影响脱硫石膏改良盐碱土壤的效果,淋洗前后油污土壤的碱化度仅从42.78%下降到37.72%;而加入腐殖酸表面活性剂后,油污盐碱土壤碱化度由42.78%下降到23.20%,淋出液电导率值显著增高,且pH值有所变化,证明加入腐殖酸表面活性剂可显著强化脱硫石膏改良油污盐碱土壤。
Soil humic acid was used as surfactant to improve gypsum soils with oily soil, and the variation of soil permeability, conductivity and pH under different salt washing conditions were studied. The results showed that oil pollution significantly affected the effect of desulfurized gypsum on the improvement of saline-alkali soil. Before and after leaching, the alkalization degree of oil-contaminated soil decreased from 42.78% to 37.72% only. When humic acid surfactant was added, The degree decreased from 42.78% to 23.20%, the conductivity of leachate was significantly increased, and the pH value changed. It was proved that the addition of humic acid surfactant can significantly enhance the improvement of oil and saline soil with gypsum.