【摘要】 通过实验室实验确定2mol/L氯化镁、0.5mol/L硫酸和450℃高温为天然钠基膨润土盐改性、酸改性和高温改性的最佳条件。采用上述3种无机改性方式填装防渗层,就其对垃圾渗滤液中主要污染物去除的有效性和控制垃圾渗滤液渗透的可行性进行研究。实验结果显示:3种无机改性膨润土的吸附能力和容量有所提高;渗透系数可达到1×10-7cm/s以下,可以作为"反应型"防渗层材料;在相同渗透量下,高温改性膨润土对垃圾渗滤液中主要污染物的去除效果最好,其次是酸改性膨润土,盐改性膨润土最差。更多还原

【Abstract】 According to the laboratory experiments,2 mol/L magnesium chloride,0.5 mol/L sulfuric acid and 450℃ roasting were determined as the optimum conditions for the natural Na-bentonite by salt modification,acidification and roasting.The availability and feasibility of the 3 inorganic modified-layers to main contaminants removal in the leachate and leachate leaking control were investigated.The experimental results indicated that the adsorptive capacities and the capacities of the 3 inorganic modified bentonites were enhanced;the permeability of the layers was less than 1×10-7 cm/s,therefore the layers could be used as the "reactive layer".In the same leaked amount sample,the best removal efficiency of the main pollutants was the roasted bentonite,and next was the acidified bentonite,and the salty modified bentonite was the lowest one.更多还原