摘要
鉴于垃圾填埋场常用天然粘性土衬里存在防渗能力的不足,提出了一种复合土(石灰+粘性土+膨润土)作为改性衬里,并以垃圾浸泡液作为渗透液进行了改性衬里和天然粘性土衬里室内土柱对比实验。结果表明,相对于天然粘性土衬里,改性后衬里的渗透系数由10-8～10-7cm s之间降低到10-9～10-8cm s之间,对垃圾浸泡液中的COD、三氮及铁离子的平均衰减百分比,分别由75.91%升高到84.42%、91.31%升高到94.06%、93.05%升高到94.67%。
Whereas natural clayey liner cannot be good enough to prevent leachate infiltration in waste landfill, this paper proposes a new kind of compound soil liner (clayey soil+lime+bentonite) as a modified clayey liner. Two columns leaching tests have been done for the landfill leachate infiltration: one is for the modified clayey material, and the other is the natural clayey soil for comparison. According to the experiment results, compared with the natural clayey liner, the permeability of the modified clayey liner can be decreased from 10-8～10-7cm/s to 10-9～10-8cm/s. And the average attenuation ratio of COD,nitrogen and iron can be increased from 75.91% to 84.42%, from 91.31% to 94.06%, from 93.05% to 94.67% , respectively.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2003年第3期355-359,共5页
Journal of Jilin University：Earth Science Edition
基金
国家教委优秀年轻教师基金项目(3600210610418)
吉林省杰出青年科学研究计划(1173)
