| 冻融作用下特定污染物的清洗试验研究 |
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| 引用本文： | 芮大虎,张军,武迎飞,杨建辉,伊藤譲.冻融作用下特定污染物的清洗试验研究[J].土木建筑与环境工程,2017,39(4):69-75. |
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| 作者姓名： | 芮大虎 张军 武迎飞 杨建辉 伊藤譲 |
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| 作者单位： | 1. 河南理工大学 土木工程学院;生态建筑与环境构建河南省工程实验室,河南 焦作 454000;中国科学院寒旱所冻土工程国家重点试验室,兰州 730000;2. 河南理工大学 土木工程学院,河南 焦作,454000;3. 河南理工大学 土木工程学院;生态建筑与环境构建河南省工程实验室,河南 焦作 454000;4. 摄南大学社会环境工学科,日本 大阪 572-8508 |
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| 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） |
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| 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NaCl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。
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| 关 键 词： | 土壤修复 抽出处理法 冻融循环 渗透性 |
| 收稿时间： | 2016/11/15 0:00:00 |
Flushing remediation with specific pollutants based on freezing and thawing |
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| Rui Dahu,Zhang Jun,Wu Yingfei,Yang Jianhui and Ito Yzuru.Flushing remediation with specific pollutants based on freezing and thawing[J].土木建筑与环境工程,2017,39(4):69-75. |
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| Authors: | Rui Dahu Zhang Jun Wu Yingfei Yang Jianhui and Ito Yzuru |
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| Affiliation: | School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, P. R. China;Henan Province Engineering Laboratory for Eco-architecture and the Built Environment, Henan Polytechnic University, Jiaozuo 454000, Henan, P. R. China;State Key Laboratory of Frozen Soil Engineering, Lanzhou 730000, P. R. China,School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, P. R. China,School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, P. R. China,School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, P. R. China;Henan Province Engineering Laboratory for Eco-architecture and the Built Environment, Henan Polytechnic University, Jiaozuo 454000, Henan, P. R. China and Department of Civil and Environment Engineering, Setsunan University, Osaka 572-8508, Japan |
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| 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 provided for the following implementation of the situ soil flushing. |
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| Keywords: | ground remediation pump & treat method freezing and thawing cycle permeability properties |
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