Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.3388
Title: New applications of fine-grained iron oxyhydroxides as cost-effective arsenic adsorbents in water treatment
Language: English
Authors: Usman, Muhammad  
Keywords: arsenic adsorption;arsenic removal;membrane processes;submerged membrane adsorption hybrid system;dynamic membrane adsorber;modeling;water and wastewater treatment
Issue Date: 2020
Examination Date: 20-Oct-2020
Abstract (german): 
Die Adsorption von Arsen, einem toxischen Wasserinhaltsstoff in vielen Oberflächen- und Grundwasserressourcen, wird an zwei feinkörnigen Eisenoxyhydroxiden mittels Adsorptionstests untersucht. Die Arsenadsorption in einem durchmischten Schlammbettreaktor wird mit einer getauchten Mikrofiltrationsmembran (MF) kombiniert, um ein innovatives und kostengünstiges Wasseraufbereitungssystem zu entwickeln. Experimentell bestimmte Arsenentfernungsraten werden unter Verwendung eines entwickelten mathematischen Modells genutzt, um die Aufbereitungsleistung unter verschiedenen Betriebsbedingungen zu modellieren. Diese Arbeit bestätigt, dass feinkörnige Eisenoxyhydroxide als aktuelle Reststoffe der herkömmlicher Adsorbentienproduktion, erfolgreich in dem entwickelten Wasseraufbereitungssystem eingesetzt werden können, um so Trinkwassergrenzwerte von < 10 µg As/L zu erreichen, ohne dass es zu Fouling auf der MF-Membran kommt.
Abstract (english): 
The adsorption of arsenic, a toxic pollutant found in surface and groundwater resources, onto two micro-sized iron oxyhydroxides as adsorbents was investigated through batch adsorption tests. Moreover, arsenic adsorption in a slurry bed reactor was combined with a submerged microfiltration (MF) membrane unit to create an innovative and cost-effective water treatment system. Experimentally determined arsenic removal rates were modeled using a developed mathematical model. This work confirms that micro-sized iron oxyhydroxides, by-products of conventional adsorbent production processes, can successfully be employed in the proposed water treatment system to achieve a drinking water standard of < 10 µg As/L without fouling of the MF membrane
URI: http://hdl.handle.net/11420/9130
DOI: 10.15480/882.3388
Institute: Wasserressourcen und Wasserversorgung B-11 
Document Type: Thesis
Thesis Type: Doctoral Thesis
Advisor: Ernst, Mathias  
Referee: Jekel, Martin 
Funded by: Deutscher Akademischer Austauschdienst
More Funding information: TUHH is thanked for resources that were acquired during the completion of this doctoral thesis.
Project: Personal fellowship under program number 50015636 
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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