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Publisher DOI: 10.1007/s11356-020-08327-w
Title: Arsenate removal from drinking water using by-products from conventional iron oxyhydroxides production as adsorbents coupled with submerged microfiltration unit
Language: English
Authors: Usman, Muhammad 
Katsoyiannis, Ioannis A. 
Rodrigues, Josma Hanna 
Ernst, Mathias 
Keywords: Adsorption kinetics;Arsenic removal;Drinking water production;Granular ferric hydroxide;Micro-sized iron oxyhydroxides;Submerged membrane adsorption hybrid system;Waste utilization
Issue Date: 10-Apr-2020
Publisher: Springer Verlag
Source: Environmental Science and Pollution Research 27 (): - (2020)
Journal or Series Name: Environmental science and pollution research 
Abstract (english): Arsenic is among the major drinking water contaminants affecting populations in many countries because it causes serious health problems on long-term exposure. Two low-cost micro-sized iron oxyhydroxide-based adsorbents (which are by-products of the industrial production process of granular adsorbents), namely, micro granular ferric hydroxide (μGFH) and micro tetravalent manganese feroxyhyte (μTMF), were applied in batch adsorption kinetic tests and submerged microfiltration membrane adsorption hybrid system (SMAHS) to remove pentavalent arsenic (As(V)) from modeled drinking water. The adsorbents media were characterized in terms of iron content, BET surface area, pore volume, and particle size. The results of adsorption kinetics show that initial adsorption rate of As(V) by μTMF is faster than μGFH. The SMAHS results revealed that hydraulic residence time of As(V) in the slurry reactor plays a critical role. At longer residence time, the achieved adsorption capacities at As(V) permeate concentration of 10 μg/L (WHO guideline value) are 0.95 and 1.04 μg/mg for μGFH and μTMF, respectively. At shorter residence time of ~ 3 h, μTMF was able to treat 1.4 times more volumes of arsenic-polluted water than μGFH under the optimized experimental conditions due to its fast kinetic behavior. The outcomes of this study confirm that micro-sized iron oyxhydroxides, by-products of conventional adsorbent production processes, can successfully be employed in the proposed hybrid water treatment system to achieve drinking water guideline value for arsenic, without considerable fouling of the porous membrane.
DOI: 10.15480/882.2760
ISSN: 1614-7499
Institute: Wasserressourcen und Wasserversorgung B-11 
Type: (wissenschaftlicher) Artikel
Project: Arsenentfernung 
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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