Pre‐deposited dynamic membrane adsorber formed of microscale conventional iron oxide‐based adsorbents to remove arsenic from water: application study and mathematical modeling
| Autor: | Ioannis A Kastoyiannis, Aida Idrissi Belkasmi, Mathias Ernst, Muhammad Usman |
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| Rok vydání: | 2021 |
| Předmět: |
General Chemical Engineering
Chemie membrane adsorber Iron oxide chemistry.chemical_element Ingenieurwissenschaften [620] Physik Inorganic Chemistry granular ferric hydroxide chemistry.chemical_compound Ingenieurwissenschaften Adsorption ddc:530 ddc:510 Physik [530] Technik [600] Waste Management and Disposal Mathematik [510] Arsenic Microscale chemistry Technische Chemie Chemie [540] Renewable Energy Sustainability and the Environment Chemistry Organic Chemistry Arsenate Technik water treatment Technische Chemie [660] Pollution homogenous surface diffusion model Fuel Technology Membrane Chemical engineering adsorption Mathematik ddc:540 ddc:660 arsenate Water treatment ddc:620 ddc:600 Biotechnology |
| Zdroj: | Journal of Chemical Technology and Biotechnology 96 (6): 1504-1514 (2021-03-05) |
| ISSN: | 1097-4660 0268-2575 |
| DOI: | 10.1002/jctb.6728 |
| Popis: | BACKGROUND: This study reports the development of a dynamic membrane (DM) adsorber by pre-depositing powdered-sizedfraction of iron oxide-based adsorptive material on the surface of a microfiltration(MF) membrane. The aim is to use the developed DM adsorber for arsenate (As(V)) remediation from water by a combined mechanism of adsorptive and membrane filtration. The two applied iron oxide-based adsorptive materials are micro-sized granular ferric hydroxide and micro-sized tetravalent manganese feroxyhyte, and are available at affordable price. RESULTS: The results show that As(V) removal efficiency strongly depends on the physicochemical properties of the depositing material such as specific surface area, isoelectric point and particle size of the pre-depositing material. The experimentally determined As(V) removal rates were mathematically modeled using a homogeneous surface diffusion model, which incorporates the equilibrium parameters and mass transport coefficients of the adsorption process. The simulations showed that the mathematical model could describe the As(V) removal rates accurately over a broad range of operating conditions. The results further showed that the longer filtration times with very low normalized As(V) permeate concentration (C/C = 0.1, for example) can be prolonged by operating the DM adsorber at the lowermost membrane water flux of 31 L m h and a large amount of pre-depositing material on the MF membrane surface (M = 14 mg cm ). CONCLUSION: The results presented in this study confirm that use of these inexpensive materials (side-product of granular iron oxide-based adsorbents) in treating As(V)-polluted water would enhance the sustainability of the industrial production process of conventional granular adsorbents by utilizing the wastes created during the process of adsorbent production. Deutscher Akademischer Austauschdienst |
| Databáze: | OpenAIRE |
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