摘要
针对填土层在填埋体中的作用 ,以成都市万兴废弃物处置场为例 ,通过土柱试验着重研究了填土层对垃圾淋滤液的净化机理。试验证明在相同的干密度下含水率大的土层对阳离子净化效果要好 ;淋滤引起土层的渗透系数明显增大 ,变化范围在 0 .5～ 1个数量级 ;典型的一价离子NH+4 (和Cl-)的净化规律可用指数函数表征。
In the waste filling, it is extremely important that the earthfill retards the percolation of the waste leached solution. On the basis of a large number of test data, the paper presents the decontamination mechanism and laws of ions frequently appearing in leachate. The results of earthcolumn tests indicate that the structure of layers has effects on the transporting and cleaning of ions in different degree with different ions; that due to exchange of adsorption with bivalent cation (Ca 2+ ,Mg 2+ )in place of monovalent ions the permeability increases 5～10 times; that potential function of typical monovalent ions (NH 4 +,Cl -) is exponential.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2000年第6期678-681,共4页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金资助项目!(49572 1 63)
关键词
卫生填埋体
填土层
土柱试验
净化机理
土层结构
landfill
earthfill
earthcolumn test
decontamination mechanism
soil structure
