Metal–organic framework@silica as a stationary phase sorbent for rapid and cost-effective removal of hexavalent chromium
| Autor: | Mohamed H. Alkordi, Rana R. Haikal, Arwa A. Abugable, Stavros Karakalos, Mohamed H. Hassan, Ahmed H. Ibrahim, Worood A. El-Mehalmey, Omar Zaki |
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| Rok vydání: | 2018 |
| Předmět: |
Sorbent
Materials science Ion exchange Renewable Energy Sustainability and the Environment Silica gel 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chloride 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Bromide medicine General Materials Science Metal-organic framework Carboxylate Hexavalent chromium 0210 nano-technology medicine.drug |
| Zdroj: | Journal of Materials Chemistry A. 6:2742-2751 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c7ta08281a |
| Popis: | A one-pot synthesis in quantitative yield is described to construct a composite of the amino-derivative Zr carboxylate metal–organic framework (MOF) and silica gel (UiO-66-NH2@silica). The silica gel was utilized as a porous solid support to enable enhanced column packing efficiency and increase the sorbent–solute contact time. The control experiment conducted on bare silica unambiguously established the active role of the amino-functionalized MOF as the ion-exchange element in the novel composite. The column prepared from this composite shows excellent hexavalent chromium uptake (Cr2O72− uptake of 277.4 mg g−1). Remarkably, this ion exchange column is capable of eliminating Cr(VI) ions even in the presence of competing anions including chloride, bromide, nitrate and sulphate, thus indicating its potential for applications in municipal as well as industrial waste water treatment. |
| Databáze: | OpenAIRE |
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