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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Lv, Guocheng Chang, Po-Hsiang Xu, Shangping Jiang, Wei-Teh Li, Zhaohui |
| Description | Author Affiliation: Li Z ( School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China); Jiang WT ( Department of Earth Sciences, National Cheng Kung University, Tainan 70101, Taiwan.); Chang PH ( Department of Earth Sciences, National Cheng Kung University, Tainan 70101, Taiwan.); Lv G ( School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.); Xu S ( Department of Geosciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA.) |
| Abstract | Ionic liquids (ILs), due to their low vapor pressure, have been explored as green solvents for organic synthesis. In this study, the uptake of ILs on a high charge Ca-montmorillonite (MMT) and the use of the IL-modified MMT for the removal of anionic contaminants from water were systematically studied. Uptake of ILs by MMT was exclusively resulted from a cation exchange mechanism when the initial IL concentrations were less than the critical micelle concentration (CMC) and the sorbed ILs formed a monolayer conformation on the surface of MMT. When the initial IL concentrations were greater than the CMC, both cation exchange and hydrophobic interactions were responsible for the IL uptake. The IL molecules formed admicelles and the surface charge was reversed to positive balanced by counterion Cl(-) when the IL loading was higher than the cation exchange capacity of the mineral. The modified MMT could remove chromate from water instantaneously, with an adsorption capacity of 190 mmol/kg and a 99.5% removal efficiency at an initial chromate concentration of 2.6 mmol/L. These features could further expand the application of ILs and enable IL-modified MMT to be used as inexpensive sorbents for the removal of chromate and other oxyanions from water. |
| ISSN | 03043894 |
| Volume Number | 270 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-04-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Bentonite Chemistry Chromates Ionic Liquids Potassium Compounds Water Pollutants, Chemical Adsorption Ion Exchange Surface Properties Water Purification Methods Journal Article Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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