建筑垃圾膏体充填材料对地下水水质影响研究

Study on the Effect of Construction Waste Filling Material on Ground Water Quality

利用静态浸出法对以建筑垃圾再生骨料和粗粉煤灰为主要材料的充填膏体进行浸泡,对浸出液中的pH、氟离子、总硬度、电导率和重金属(锰、铜、锌、铬、镉、铅)含量进行检测,并且根据国家地下水质量标准进行评价。试验结果表明:监测溶液的pH值在10左右,超过地下水V类标准;浸出液的氟离子、总硬度、金属离子含量均低于地下水Ⅱ类标准,不会对地下水构成污染,因此这类充填材料可以用于矿山充填,但回用地下水时需要考虑其酸碱度对地下水的影响。

The filling paste which was mainly composed of construction waste and reject fly ash was immersed by static leaching method.Then the pH value,fluoride ion content,total hardness,electrical conductivity and heavy metals(Cu,Zn,Mn,Cr,CD,Pb)contents in the leaching solution were detected and evaluated according to the national standard of ground water quality.The test results showed that the pH value was about 10,exceeding the ground water quality criterion V,while the fluoride ion content,total hardness,and heavy metals contents were all lower than ground water quality criterionⅡ,having no pollution to groundwater.Therefore,this filling material could be used for mine filling.However,the pH value should be considered when reusing the ground water.