复合污染作用下膨润土的防渗性能研究

doi:10.19841/j.cnki.hjwsgc.2023.01.010

环境卫生工程 ›› 2023, Vol. 31 ›› Issue (1): 63-68.doi: 10.19841/j.cnki.hjwsgc.2023.01.010

• 固体废物处理过程衍生污染控制 • 上一篇下一篇

复合污染作用下膨润土的防渗性能研究

陈宏信，潘鸿诚，尹泽豪，闵欣愉，石福江，高　亮

1. 同济大学土木工程学院地下建筑与工程系；2. 澳门大学智慧城市物联网国家重点实验室；3. 澳门大学土木与环境工程系

出版日期:2023-03-01 发布日期:2023-03-01

Study of Anti-seepage Performance of Bentonite under the Influence of Compound Pollution

CHEN Hongxin， PAN Hongcheng， YIN Zehao， MIN Xinyu， SHI Fujiang， GAO Liang

1. Department of Geotechnical Engineering， College of Civil Engineering， Tongji University； 2. State Key Laboratory of Internet of Things for Smart， University of Macau； 3. Civil and Environmental Engineering, University of Macao

Online:2023-03-01 Published:2023-03-01

摘要/Abstract

摘要： 复合污染是实际工程中常见的污染类型，膨润土基防污屏障是阻滞污染物运移最有效的方式之一。为探究复合污染对膨润土防渗性能的影响，开展了自由膨胀试验及扫描电子显微镜（SEM）试验，研究不同组合、不同浓度的Cu2+、Pb2+和醇类复合污染作用下膨润土防渗性能的变化规律以及微观影响机制。试验结果表明：在同一价态重金属复合污染作用下，膨润土防渗性能主要与溶液中重金属总浓度相关，受重金属种类的影响较小；在重金属-乙醇复合污染作用下，随重金属总浓度的增大，乙醇对防渗性能具有促进作用的浓度区间减小，促进作用效果减弱，最终表现为抑制作用。

关键词: 自由膨胀试验, 复合污染, 钠基膨润土, 防渗性能

Abstract: Compound pollution is one of the most common pollution types in engineering practices. Bentonite anti-fouling barrier had been widely used to prevent the migration of contaminants. In order to investigate the influence of compound pollution on the anti-seepage performance of bentonite， the free-swelling test and scanning electron microscope （SEM） test were conducted. The variation of the anti-seepage performance of bentonite and the microscopic influence mechanism under the combined pollution effects of different combinations and concentrations of Cu2+， Pb2+ and alcohols were studied. The results showed that for the compound pollution of different metal ions with the same valence， the anti-seepage performance of bentonite was mainly related to the total concentration of metal ions in the solution， and slightly influenced by ion type. For the compound pollution of metal ions and ethanol， with the total concentration of heavy metal increased， the concentration range of ethanol which could promote the anti-seepage performance decreased， the promotion effect gradually decreased and finally appeared as inhibition.

Key words: free-swelling test, compound pollution, Na-bentonite, anti-seepage performance

陈宏信, 潘鸿诚, 尹泽豪, 闵欣愉, 石福江, 高　亮. 复合污染作用下膨润土的防渗性能研究[J]. 环境卫生工程, 2023, 31(1): 63-68.

CHEN Hongxin, PAN Hongcheng, YIN Zehao, MIN Xinyu, SHI Fujiang, GAO Liang. Study of Anti-seepage Performance of Bentonite under the Influence of Compound Pollution[J]. Environmental Sanitation Engineering, 2023, 31(1): 63-68.

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复合污染作用下膨润土的防渗性能研究

Study of Anti-seepage Performance of Bentonite under the Influence of Compound Pollution

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