Adsorption of chromium by functionalized metal organic frameworks from aqueous solution
| Autor: | Yu Gao, Yu-Ying Deng, Jianliang Xue, Xinfeng Xiao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Chromium
Langmuir Materials science 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Isothermal process Metal Adsorption Spectroscopy Fourier Transform Infrared Environmental Chemistry Waste Management and Disposal Metal-Organic Frameworks 0105 earth and related environmental sciences Water Science and Technology Aqueous solution Water General Medicine Hydrogen-Ion Concentration 020801 environmental engineering Kinetics chemistry Chemical engineering Kinetic equations visual_art visual_art.visual_art_medium Metal-organic framework Water Pollutants Chemical |
| Zdroj: | Environmental technology. 42(12) |
| ISSN: | 1479-487X |
| Popis: | Based on Cu-BTC metal-organic framework, thiol-functionalized and amino functionalized materials were prepared by the modified Stober method. Then, the Cu3(BTC)2 and the functionalized materials were characterized by means of X-ray diffraction, SEM-EDS and FT-IR analysis. The adsorption properties of two materials for Cr(VI) were investigated. Both functionalized materials show good adsorption under acidic conditions. Through adsorption model analysis, the adsorption of Cr(VI) by the two materials were more in line with the pseudo-second-order kinetic equation. The adsorption capacities of Langmuir isothermal fitting were 15.17 mg g-1 and 7.17 mg g-1, respectively. During the adsorption process, the functionalized material does not swell and is insoluble in water. After five adsorption-desorption cycles, the adsorption capacity is basically constant and the material can be reused. The results show that the above two functionalized MOFs have good application prospects in the adsorption and removal of heavy metal Cr(VI) in aqueous solution. |
| Databáze: | OpenAIRE |
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