| Effect of Clay Minerals on Transport of Surfactants Dispersed Multi-walled Carbon Nanotubes in Porous Media |
| |
| 作者姓名： | ZHANG Wei ZHANG Fawang HAN Zhantao Lü Xiaoli LIN Daohui David WERNER |
| |
| 作者单位： | 1 Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China；
2 Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, 050061, China,3 Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin, 541004, China,1 Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China；
2 Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, 050061, China,1 Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China；
2 Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, 050061, China,4 Department of Environmental Science, Zhejiang University, Hangzhou, 310028, China,5 School of Civil Engineering and Geosciences, Newcastle University, NE1 7RU, England, U.K |
| |
| 基金项目： | This work was supported by National Natural Science Foundation of China (41002088), and Fundamental Research Project (SK201002, SK201502) of the Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences. |
| |
| 摘 要： | Clay minerals can hinder the transport of various contaminants in soil and aquifer, but how clay minerals affect the transport of nanoparticles in aquifers has not been investigated in depth. In this paper, the transport of surfactants dispersed multi-walled carbon nanotubes (MWCNTs) in well-defined quartz sand and mixtures of quartz sand and clay minerals (kaolinite and montmorillonite) with varying ionic strengths was studied. Sodium dodecyl benzenesulfonate (SDBS) and octyl-phenol-ethoxylate (TX100) MWCNT suspensions can migrate through quartz sand easily, but the presence of less than 2% w/w clay minerals in quartz sand can significantly hinder the transport of MWCNT suspensions, especially at high ion strength (0.6 mM CaCl2). The inhibition mechanism of clay minerals for surfactant-dispersed MWCNTs in porous media is the interception of MWCNTs. Kaolinite has stronger inhibition effect for MWCNTs transport than montmorillonite because more kaolinite can be retained in the quartz sand. Adsorption of surfactants by clay minerals does not affect the transport of MWCNTs significantly. This finding is important for the environmental assessment of MWCNT transport risks in soils and aquifers.
|
| 关 键 词： | Multi-walled carbon nanotubes clay mineral surfactant colloid transport porous media |
| 收稿时间： | 2007/6/15 0:00:00 |
| 修稿时间： | 2015/12/21 0:00:00 |
Effect of Clay Minerals on Transport of Surfactants Dispersed Multi-walled Carbon Nanotubes in Porous Media |
| |
| Authors: | Wei ZHANG Fawang ZHANG Zhantao HAN Xiaoli LÜ Daohui LIN David WERNER |
| |
| Institution: | 1. Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, China;2. Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, China;3. Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin, China;4. Department of Environmental Science, Zhejiang University, Hangzhou, China;5. School of Civil Engineering and Geosciences, Newcastle University, England, U.K |
| |
| Abstract: | Clay minerals can hinder the transport of various contaminants in soil and aquifer, but how clay minerals affect the transport of nanoparticles in aquifers has not been investigated in depth. In this paper, the transport of surfactants dispersed multi-walled carbon nanotubes (MWCNTs) in well-defined quartz sand and mixtures of quartz sand and clay minerals (kaolinite and montmorillonite) with varying ionic strengths was studied. Sodium dodecyl benzenesulfonate (SDBS) and octyl-phenol-ethoxylate (TX100) MWCNT suspensions can migrate through quartz sand easily, but the presence of less than 2% w/w clay minerals in quartz sand can significantly hinder the transport of MWCNT suspensions, especially at high ion strength (0.6 mM CaCl2). The inhibition mechanism of clay minerals for surfactant-dispersed MWCNTs in porous media is the interception of MWCNTs. Kaolinite has stronger inhibition effect for MWCNTs transport than montmorillonite because more kaolinite can be retained in the quartz sand. Adsorption of surfactants by clay minerals does not affect the transport of MWCNTs significantly. This finding is important for the environmental assessment of MWCNT transport risks in soils and aquifers. |
| |
| Keywords: | Multi-walled carbon nanotubes clay mineral surfactant colloid transport porous media |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《Acta Geologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Geologica Sinica》下载免费的PDF全文 |
|
