Phosphate recovery from wastewater using engineered superparamagnetic particles modified with layered double hydroxide ion exchangers

Drenkova-Tuhtan A, Mandel K, Paulus A, Meyer C, Hutter F, Gellermann C, Sextl G, Franzreb M, Steinmetz H (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Water Research Elsevier / IWA Publishing

Book Volume: 47

Pages Range: 5670-5677

Journal Issue: 15

DOI: 10.1016/j.watres.2013.06.039

Abstract

An innovative nanocomposite material is proposed for phosphate recovery from wastewater using magnetic assistance. Superparamagnetic microparticles modified with layered double hydroxide (LDH) ion exchangers of various compositions act as phosphate adsorbers. Magnetic separation and chemical regeneration of the particles allows their reuse, leading to the successful recovery of phosphate.Based upon the preliminary screening of different LDH ion exchanger modifications for phosphate selectivity and uptake capacity, MgFe-Zr LDH coated magnetic particles were chosen for further characterization and application. The adsorption kinetics of phosphate from municipal wastewater was studied in dependence with particle concentration, contact time and pH. Adsorption isotherms were then determined for the selected particle system. Recovery of phosphate and regeneration of the particles was examined via testing a variety of desorption solutions. Reusability of the particles was demonstrated for 15 adsorption/desorption cycles. Adsorption in the range of 75-97% was achieved in each cycle after 1h contact time. Phosphate recovery and enrichment was possible through repetitive application of the desorption solution. Finally, a pilot scale experiment was carried out by treating 125L of wastewater with the particles in five subsequent 25L batches. Solid-liquid separation on this scale was carried out with a high-gradient magnetic filter (HGMF). © 2013 Elsevier Ltd.

Authors with CRIS profile

Karl Mandel

Involved external institutions

Fraunhofer Institut für Silicatforschung (ISC) DE Germany (DE) Universität Stuttgart DE Germany (DE) Karlsruhe Institute of Technology (KIT) DE Germany (DE)

How to cite

APA:

Drenkova-Tuhtan, A., Mandel, K., Paulus, A., Meyer, C., Hutter, F., Gellermann, C.,... Steinmetz, H. (2013). Phosphate recovery from wastewater using engineered superparamagnetic particles modified with layered double hydroxide ion exchangers. Water Research, 47(15), 5670-5677. https://dx.doi.org/10.1016/j.watres.2013.06.039

MLA:

Drenkova-Tuhtan, Asya, et al. "Phosphate recovery from wastewater using engineered superparamagnetic particles modified with layered double hydroxide ion exchangers." Water Research 47.15 (2013): 5670-5677.

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