摘要
通过击实、渗透试验得到粉煤灰改性-黄土的最佳配比为10%。对压实黄土和压实粉煤灰改性-黄土,分别用清水和渗滤液进行室内渗透试验,结果表明:渗滤液在压实粉煤灰改性黄土中的渗透系数≤1.0×10-7cm/s,在压实黄土中的渗透系数≤1.0×10-5cm/s,前者可作为填埋场防渗垫层,后者可作为填埋场防渗保护垫层。对COD、NH3-N的去除效果前者优于后者。
It has been found that the better fly-ash modified loess liner could be achieved while fly-ash filling rate is 10% by the compacting and permeability tests. Two laboratory permeability tests have been done for tap water and leachate infiltration, respectively. One was for the compacted loess, and the other for the compacted fly-ash modified loess. The findings indicated that the permeability of leachate in the compacted fly-ash modified loess could be less than 1.0 ×10^-7 cm/s, and also less than 1.0 ×10^-5 cm/s when in compacted loess. The former can be used as the landfill liner, and the latter the landfill protective liner. Furthermore, the removal efficiency of COD and NH3-N of the former was better than that of the latter.
出处
《环境工程》
CAS
CSCD
北大核心
2009年第4期105-108,86,共5页
Environmental Engineering
基金
自然科学基金(NSFC40671167)
国家环境保护公益性项目(NEPCP200809098)资助
关键词
粉煤灰改性黄土
压实黄土
渗透系数
渗滤液
fly-ash modified loess
compacted loess
permeability coefficient
leachate
