Comparative assessment of modified bentonites as retardation barrier: adsorption performance and characterization
文献类型：期刊论文
| 作者 | Guo, Dongdong3,4; Wan, Yong3,4; Li, Jiangshan1,3,4; Liu, Ruiqi2; Liu, Lei1,3,4; Xue, Qiang1,3,4
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| 刊名 | ENVIRONMENTAL EARTH SCIENCES
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| 出版日期 | 2023 |
| 卷号 | 82期号:2页码:- |
| 关键词 | Bentonite Modification Heavy metal Organic contaminant Adsorption |
| ISSN号 | 1866-6280 |
| 英文摘要 | Modified bentonites for the anti-seepage system have been attracting global attention. At the same time, the performances of modified bentonite containing retardation barrier exposed to organic-heavy metal pollutants have not been fully reported. In this study, the adsorption performances (one of the key evaluation indicators of retardation barrier) of nine kinds of commonly used modified bentonites on multiple contaminants were comparatively investigated. The x-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses were also performed to unravel the adsorption mechanisms. Results show that the adsorption of modified bentonites on phenol and Pb(II) follows the order of SB-16 > PVA > CTAB > APAM > CTAB + PAC > PAC > CPAM > CTAB + PAC > CTAB + CPAM + APAM. Among all the samples, the bentonite modified with SB-16 showed the highest adsorption capacities for phenol and Pb(II). The surfactant molecules inserted in the interlayer space of montmorillonite increase the substrate spacing, which changes the structural properties of the bentonite from hydrophilic to hydrophobic and increases the adsorption of organic contaminants. On the other hand, the polymer has functional groups such as hydroxyl and carboxyl that can form a spatial three-dimensional cross-linking structure on the bentonite surface, providing more adsorption sites for heavy metal ions. These findings indicate the potential industrial applications of modified bentonite in a contaminant barrier system. |
| 学科主题 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000912392400004 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35316]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.IRSM–CAS/HK Poly U Joint Laboratory on Solid Waste Science, Wuhan 430071, China 2.School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 4.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Guo, Dongdong,Wan, Yong,Li, Jiangshan,et al. Comparative assessment of modified bentonites as retardation barrier: adsorption performance and characterization[J]. ENVIRONMENTAL EARTH SCIENCES,2023,82(2):-. |
| APA | Guo, Dongdong,Wan, Yong,Li, Jiangshan,Liu, Ruiqi,Liu, Lei,&Xue, Qiang.(2023).Comparative assessment of modified bentonites as retardation barrier: adsorption performance and characterization.ENVIRONMENTAL EARTH SCIENCES,82(2),-. |
| MLA | Guo, Dongdong,et al."Comparative assessment of modified bentonites as retardation barrier: adsorption performance and characterization".ENVIRONMENTAL EARTH SCIENCES 82.2(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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