Efficient capture of nitrobenzene from waste water using metal–organic frameworks
| Autor: | Hongliang Huang, Qingyuan Yang, Liting Xie, Chongli Zhong, Dahuan Liu |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
General Chemical Engineering Diffusion Inorganic chemistry Langmuir adsorption model chemistry.chemical_element General Chemistry Industrial and Manufacturing Engineering Nitrobenzene symbols.namesake chemistry.chemical_compound Adsorption chemistry Aluminium symbols Environmental Chemistry Metal-organic framework Methanol Porous medium |
| Zdroj: | Chemical Engineering Journal. 246:142-149 |
| ISSN: | 1385-8947 |
| Popis: | In this work, a series of metal–organic frameworks (MOFs) are systematically screened for the capture of nitrobenzene (NB) from water for the first time. The results show that the adsorption capacities of two aluminum-based MOFs, CAU-1 and MIL-68(Al), can reach around 970 ± 10 and 1130 ± 10 mg g − 1 respectively, which are much higher than the experimental values of other porous materials reported so far. The μ 2 -OH in Al–O–Al units of Al-MOFs may play a key role in the adsorption process of NB. Langmuir isotherm was found to be suitable for depicting the NB adsorption process on these two MOFs, and the adsorption kinetics appropriately matched the pseudo-second-order model. Moreover, the Weber–Morris intraparticle diffusion model demonstrates that intraparticle diffusion is not the only rate-limiting step, and film diffusion also plays an important role in the adsorption for NB on MOFs. In addition, the regeneration of CAU-1 and MIL-68(Al) could be fully achieved using methanol without secondary pollution. These results indicate that MOFs are promising adsorbents for efficient capture of NB from waste water, and further in-depth investigations deserve to be performed. |
| Databáze: | OpenAIRE |
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