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Publisher DOI: 10.1002/jctb.6728
Title: Pre-deposited dynamic membrane adsorber formed of microscale conventional iron oxide-based adsorbents to remove arsenic from water : application study and mathematical modeling
Language: English
Authors: Usman, Muhammad  
Belkasmi, Aida Idrissi 
Kastoyiannis, Ioannis A. 
Ernst, Mathias  
Keywords: adsorption;arsenate;granular ferric hydroxide;homogenous surface diffusion model;membrane adsorber;water treatment
Issue Date: 5-Mar-2021
Publisher: John Wiley & Sons
Source: Journal of Chemical Technology and Biotechnology (): - (2021-03-05)
Journal or Series Name: Journal of Chemical Technology and Biotechnology 
Abstract (english): 
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.
DOI: 10.15480/882.3469
ISSN: 0268-2575
Institute: Wasserressourcen und Wasserversorgung B-11 
Document Type: Article
Funded by: Deutscher Akademischer Austauschdienst 
More Funding information: The authors are obliged to the German Academic Exchange Service (DAAD) for the fellowship of Mr Usman and the Hamburg University of Technology for resources. Professor Mitrakas, Department of Chemical Engineering, Aristotle University of Thessaloniki, Greece, and GEH Wasserchemie GmbH & Co., Osnabrück, Germany, are thanked for offering tetravalent manganese feroxyhyte and the micro-sized granular ferric hydroxide materials for the purposes of research. Open access funding enabled and organized by Projekt DEAL.
Project: Arsenentfernung 
License: CC BY-NC 4.0 (Attribution-NonCommercial) CC BY-NC 4.0 (Attribution-NonCommercial)
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