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Comparing fine particulate iron hydroxide adsorbents for the removal of phosphate in a hybrid adsorption/ultrafiltration system

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dc.contributor.authorHilbrandt, Inga
dc.contributor.authorShemer, Hilla
dc.contributor.authorRuhl, Aki Sebastian
dc.date.accessioned2024-06-16T14:37:29Z
dc.date.available2024-06-16T14:37:29Z
dc.date.issued2019
dc.description.abstractThe use of micro-sized iron hydroxide adsorbents in mixed reactors is a promising technique for the removal of inorganic contaminants from wastewater within minutes of contact time. This study focusses on phosphate adsorption onto fine fraction granular ferric hydroxide (nGFH) and iron oxy(hydr)oxide agglomerates (IOAs) in a reactor with submerged ultrafiltration (UF) membrane. The performance of the hybrid adsorption/UF membrane system was evaluated for various adsorbents and phosphate concentrations, residence times and concentrations of co-existing ions. The membrane was not fouled at the experimental conditions used (up to 6.3 g/L adsorbent). Phosphate loadings of 20 and 60 mg P/g Fe (36.1 and 108.3 mol P/mol Fe) were reached for nGFH and IOAs, respectively (C0(P) = 4.5 mg/L, deionized water at pH 8, C(Fe) = 0.6 g/L). A shortened residence time of 15 min in the reactor led to a decrease in final loading of 6 mg/g compared to 30 min residence time (54 mg/g compared to 60 mg/g). An extension to 60 min did not result in higher loadings. An increase in adsorbent (IOA) concentration from 0.1 to 0.3 mg/L resulted in an increase of phosphate removal (27 to 35%). Simultaneously, loadings decreased from 50 to 35 mg/g. The application of the developed process for the treatment of artificial secondary effluent resulted in an increase of 87 and 60% in treated volumes until breakthrough (50%) for nGFH and IOAs, respectively, compared to deionized water. Thus, the combined process of adsorption and particle separation using a submerged membrane can be well adjusted according to water composition, initial pollutant concentrations and desired removals. © 2019 Elsevier B.V. All rights reserved.en
dc.format.extent1 Onlineressource (Seiten 23-28)
dc.identifier.doihttps://doi.org/10.60810/openumwelt-430
dc.identifier.urihttps://openumwelt.de/handle/123456789/5115
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleComparing fine particulate iron hydroxide adsorbents for the removal of phosphate in a hybrid adsorption/ultrafiltration system
dc.typeWissenschaftlicher Artikel
dspace.entity.typePublication
local.bibliographicCitation.journalTitleSeparation and purification technology
local.bibliographicCitation.originalDOI10.1016/j.seppur.2019.03.044
local.bibliographicCitation.volume221 (2019)
local.collectionAufsätze
local.contributor.authorId02181689
local.contributor.authorId02182752
local.identifier.catalogId02468565
local.ingest.leader04334naa a2200000uu 4500
local.jointTitleCOMPARING FINE PARTICULATE IRON HYDROXIDE ADSORBENTS FOR THE REMOVAL OF PHOSPHATE IN A HYBRID ADSORPTIONULTRAFILTRATION SYSTEM
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relation.isAuthorOfPublication94c1139a-1828-4d1c-bf3e-f6f519e3d4e8
relation.isAuthorOfPublication.latestForDiscovery94c1139a-1828-4d1c-bf3e-f6f519e3d4e8
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