摘要
根据世界各国的经验,在未来相当长的时期内,填埋仍将是城市固体废物(MSW)的主要处置方式,但MSW渗滤液的产生及处理不仅加大了填埋场的建设及运行成本,而且也增大了发生二次污染的风险。MSW填埋结构中的单元覆盖层具有防止降水入渗、减少(或消除)渗滤液数量的重要作用,而这种作用能否充分发挥则取决于其渗透性能,因此,单元覆盖层的防渗研究具有重要的实用价值。文章重点介绍了该领域研究已取得的进展,包括阳离子、阴离子、pH及氧化物等对饱和土体渗透性的影响、非饱和土体胀缩行为与渗透性变化的描述及饱和、非饱和土体隔水性能优化等;提出了该领域研究中存在的问题及未来发展方向。
According to the experiences of municipal solid waste(MSW) disposal from many countries,landfill is still one of the main garbage treatment ways for a long run.Intermediate soil layers in landfill site can resist the seepage of rainfall and reduce volume of leachate from landfill to some extent,which depends on the sealant characteristics of the layer.Therefore,it is important to prevent seepage of the soil layers.The achievements of the research field are presented,including the effect of cations,anions,pH,Fe and Al hydroxides on saturated hydraulic conductivity,describing the shrinkage\|swelling behavior and permeability change of unsaturated clay and optimizing the sealant characteristics of saturated and unsaturated clays.The existing problems and the developing trend in this field are discussed.
出处
《中国地质灾害与防治学报》
CSCD
2003年第1期42-47,共6页
The Chinese Journal of Geological Hazard and Control
基金
教育部重点科技项目(02140)
云南省自然科学基金资助项目(2001E0001G)
