摘要
通过模拟实验研究垃圾渗滤液污染地下环境介质岩性对pH缓冲能力变化的影响。亚黏土和砂土的pH缓冲容量的本底值分别为440.20和324.93mmol/(kg·pH),其中阳离子交换缓冲、碳酸钙缓冲、硅酸盐缓冲和次级缓冲的本底值分别为206.18、88.43、75.79和69.80mmol/(kg·pH),149.31、86.53、47.33和41.77mmol/(kg·pH)。污染的亚黏土和砂土的交换性阳离子(CEC)和交换性盐基离子(BEC)均小于本底值;盐基饱和度随离污染源距离的增加呈先升高后降低的变化趋势。
Simulated experiment was constructed to investigate the influences on pH buffering capacity of subsurface environmental media lithology polluted by landfill leachate.Experimental results indicated that the background values of pH buffering capacity of loam and sandy soil as 440.20 and 324.93 mmol/（kg·pH）.Cation exchange,calcium carbonate,silicate and secondary buffering capacity of loam as 206.18、88.43、75.79 and 69.80 mmol/（kg pH） and that of sandy soil as 149.31,86.53,47.33 and 41.77 mmol/（kg pH）,respectively.Both of the cation exchange capacity（CEC） and the base exchangeable cation（BEC） of polluted loam and sandy soil were lower than the background in value.Base saturation was increasing first and decreasing followed along with the distance incresed of pollution source.
出处
《世界地质》
CAS
CSCD
2010年第3期490-494,共5页
World Geology
基金
国家自然科学基金项目(40802055)
关键词
垃圾渗滤液
pH缓冲体系
介质
岩性
landfill leachate
pH buffering system
media
lithology
