人工冻结土污染物隔离屏障应用现状及研究展望

Application and Prospect of Frozen Soil Barrier in Containments Isolation

土体冻结后渗透系数显著降低,能够减缓其中污染物的迁移速度,因此冻土屏障已经被应用于污染物处置领域。通过介绍国内外有关研究现状,总结近年来污染物在工程屏障中的扩散与吸附特性、天然冻土中污染物的运移特性、利用人工冻土处置污染物等方面的研究成果,对该领域常用研究方法、思路和技术进行了介绍,总结污染物常见工程屏障材料以及天然冻土中的迁移特征,指出现有研究的成果与不足,对人工形成冻土屏障处置污染物的技术发展前景进行了展望,提出了更深入的研究人工冻土阻滞机理的设想。

The permeability of soil decreased significantly after freezing,which can decrease the rate of migration of contaminants. So frozen soil barrier has been applied to the field of contamination disposition. By introducing the study status of the domestic and foreign researchers,summaries of environmental protection of permafrost areas and the application of artificial frozen soil in environmental area have been made. Also the research methods,ideas and techniques were introduced. The characteristic of contaminant migration in frozen soil has been summarized. By analyzing the results and shortages of existing research,the assumption of deeper research on a drag mechanism of artificial frozen soil barrier has been put forward and the development prospect of contamination disposition by using artificial frozen soil barrier were proposed.