第39秦第4期 2017年8月
土水建筑与环境工程
Journal of Civil,Architectural &.Environmental Engineering
doi;10.11835/j.issn. 1674-4764. 2017.04. 011
冻融作用下特定污染物的清洗试验研究
芮大虎"，2，张军，武迎飞1a，杨建辉，伊藤”
Vol. 39 No. 4 Aug. 2017
(1.河南理工大学a。土木工程学院；b.生态建筑与环境构建河南省工程实验室，河南焦作454000；2.中国科学院寒旱所冻土工程国家重点试验室，兰州730000；3.摄南大学社会环境工学科，日本大阪572-8508）
摘要：抽出处理法是目前修复土壤污染常用的方法之一，为了解决抽出处理法中对渗透性差的土中污染物和低浓度污染物效率低的问题，利用土体冻结过程中在一定的温度梯度和水分条件下未冻土侧水分(溶质)向冻结锋面迁移和冻融作用导致渗透性增强的特性，开展了基础试验。试验将混有模拟污染物NaCI溶液的粘土作为研究对象，结合传统的抽出处理法，实施了单向冻融试验和污染物清洗模型试验，探索了利用冻融现象清洗污染土壤的可行性。结果表明，冻融作用有助于提高污染物的抽出效率。
关键词：土壤修复；抽出处理法；冻融循环；渗透性
中图分类号：TU411.1
文献标志码：A文章编号：1674-4764(2017)04-0069-07
FlushingremediationwithSpecificpollutantsbased
on freezing and thawing
Rui Dahul.2,ZhangJunl,WuYingfeila,YangJianhui',Ito Yzuru
(la. School of Civil Engineering; lb. Henan Province Engineering Laboratory for Eco-architecture and the Built
Environment, Henan Polytechnic University, Jiaozuo 454000, Henan, P. R. China; 2. State Key Laboratory of Frozen Soil Engineering, Lanzhou 730000, P. R. China;
3. Department of Civil and Environment Engineering, Setsunan University, Osaka 572-8508, Japan)
Abstract:Currently+ pump &. treat, which is one of the common repair contaminated soil methods, could get rid of some pollutants efficiently. However, it's very limit for poor permeability and low concentration pollutions. In consideration of the property that water would shift from unfrozen region to freezing front and soil permeability will also enhance by freeze-thaw action under certain conditions of temperature gradients and moisture, the pump &. treats extraction productivity was explored in experimental research throughbasic experiments. Clay mixed with NaCl (simulation of heavy metal pollutants) is used as the study object and experienced the unidirectional freeze-thaw and pollutants cleansing test, The feasibility of freeze-thaw action flush pollutants is explored. The experimental results show that the freezing and thawing action is contribute to advancing pollutant removed efficiency and a reliable experimental basis is
收稿日期：2016-11-15
基金项目：国家自然科学基金（41371092)；冻土工程国家重点实验室开放基金（SKLFSE201402)；河南省教育厅科技攻关
项目(14B170007)
作者简介：芮大虎（1969-），男，博士后，副教投授，主要从事冻土与环境工程研究，（E-mail)dhrui@hpu.edu.cn。 Received:2016-11-15
Foundation item: National Natural Science Foundation of China (No. 41371092) ; Open Fund of State Key Laboratory of
Frozen Soil Engineering (No. SKLFSE201402) ; Technology Research Project of Education Department in Henan (No. 14B170007)
Author brief: Rui Dahu (1969- ), PhD, associate professor, main research interests: freezing soil and environment
engineering, (E-mail) dhrui@hpu. edu. cn.
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