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Nalidixic acid and Fe(II)/Cu(II) coadsorption at Goethite and Akaganéite surfaces
College of Resources and Environmental Science, South-Central Minzu University, Wuhan, China.
College of Resources and Environmental Science, South-Central Minzu University, Wuhan, China.
College of Resources and Environmental Science, South-Central Minzu University, Wuhan, China.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. Université de Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, Rennes, France.
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2023 (Engelska)Ingår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 57, nr 41, s. 15680-15692Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Interactions between aqueous Fe(II) and solid Fe(III) oxy(hydr)oxide surfaces play determining roles in the fate of organic contaminants in nature. In this study, the adsorption of nalidixic acid (NA), a representative redox-inactive quinolone antibiotic, on synthetic goethite (α-FeOOH) and akaganéite (β-FeOOH) was examined under varying conditions of pH and cation type and concentration, by means of adsorption experiments, attenuated total reflectance-Fourier transform infrared spectroscopy, surface complexation modeling (SCM), and powder X-ray diffraction. Batch adsorption experiments showed that Fe(II) had marginal effects on NA adsorption onto akaganéite but enhanced NA adsorption on goethite. This enhancement is attributed to the formation of goethite-Fe(II)-NA ternary complexes, without the need for heterogeneous Fe(II)-Fe(III) electron transfer at low Fe(II) loadings (2 Fe/nm2), as confirmed by SCM. However, higher Fe(II) loadings required a goethite-magnetite composite in the SCM to explain Fe(II)-driven recrystallization and its impact on NA binding. The use of a surface ternary complex by SCM was supported further in experiments involving Cu(II), a prevalent environmental metal incapable of transforming Fe(III) oxy(hydr)oxides, which was observed to enhance NA loadings on goethite. However, Cu(II)-NA aqueous complexation and potential Cu(OH)2 precipitates counteracted the formation of ternary surface complexes, leading to decreased NA loadings on akaganéite. These results have direct implications for the fate of organic contaminants, especially those at oxic-anoxic boundaries.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2023. Vol. 57, nr 41, s. 15680-15692
Nyckelord [en]
Cu(II), Fe(II), Fe(III) oxy(hydr)oxide, modeling, quinolone antibiotics
Nationell ämneskategori
Oorganisk kemi
Identifikatorer
URN: urn:nbn:se:umu:diva-216676DOI: 10.1021/acs.est.3c05727ISI: 001079404700001PubMedID: 37796760Scopus ID: 2-s2.0-85175585504OAI: oai:DiVA.org:umu-216676DiVA, id: diva2:1814238
Forskningsfinansiär
Vetenskapsrådet, 2020-04853Tillgänglig från: 2023-11-23 Skapad: 2023-11-23 Senast uppdaterad: 2023-11-23Bibliografiskt granskad

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Luo, TaoBoily, Jean-Francois

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Environmental Science and Technology
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