Metal–Organic Framework-74 for Ultratrace Arsenic Removal from Water: Experimental and Density Functional Theory Studies
| Autor: | Mohammad N. Ahmad, Antranik Jonderian, Ali Chouman, Mohamad Hmadeh, Mazen Al-Ghoul, Belal J. Abu Tarboush |
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| Rok vydání: | 2018 |
| Předmět: |
Precipitation (chemistry)
Chemistry Inorganic chemistry Langmuir adsorption model chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences symbols.namesake Adsorption symbols Particle General Materials Science Metal-organic framework 0210 nano-technology Dispersion (chemistry) Arsenic |
| Zdroj: | ACS Applied Nano Materials. 1:3283-3292 |
| ISSN: | 2574-0970 |
| Popis: | This study investigates and compares arsenic, As(V), removal from aqueous media using the water-stable zinc metal–organic frameworks (Zn-MOF-74) prepared via room-temperature precipitation (RT-Zn-MOF-74) and a solvothermal procedure (HT-Zn-MOF-74). The Zn-MOF-74 crystals possess average particle sizes of 66 nm and 144 μm for RT-Zn-MOF-74 and HT-Zn-MOF-74, respectively. Moreover, nanosized RT-Zn-MOF-74 exhibited a superior performance to HT-Zn-MOF-74. While the Brunauer–Emmett–Teller surface area of RT-Zn-MOF-74 was smaller than that of HT-Zn-MOF-74, higher adsorption uptake took place on the room-temperature-synthesized ones because of their small particle size and better dispersion. Adsorption isotherm studies showed that the Langmuir isotherm was effective for the adsorption of As(V) onto RT-Zn-MOF-74 and HT-Zn-MOF-74 with maximum adsorption uptake (qmax) values of 99.0 and 48.7 mg g–1, respectively. These values exceed most reported maximum adsorption capacities at neutral pH. The thermodynamics of ads... |
| Databáze: | OpenAIRE |
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