Effects of anionic surfactants on ligand-promoted dissolution of iron and aluminum hydroxides

Carrasco, Naraya; Kretzschmar, Ruben; Pesch, Marie-Laure; Kraemer, Stephan M.

doi:10.1016/j.jcis.2008.02.011

Cited by 14 publications

(25 citation statements)

References 34 publications

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“…Dissolution rates of (hydr)oxides are generally pH independent over the environmentally relevant range (i.e., pH 5-9) and dissolution proceeds exclusively by a ligand-promoted reaction, producing Fe(III)-complexes (Lloyd 1999). Hydroxamate siderophore-promoted dissolution rates, compiled from a number of sources (Hersman et al 1995;Lloyd 1999;Cocozza et al 2002;Neubauer et al 2002;Yoshida et al 2002;Cheah et al 2003;Carrasco et al 2007;Wolff-Boenisch and Traina 2007;Carrasco et al 2008) and spanning a large range of pH (3-9), concentration (1.3 9 10 -5 -10 -3 M), and solid phases [a-FeOOH, a-Fe 2 O 3 , and a poorly crystalline Fe(III)-hydroxide] vary by less than a factor of 20 (R = 10 -11.5 -10 -12.8 mol m -2 s -1 ), strongly suggesting commonalities among the mechanisms of hydroxamate siderophore-promoted dissolution. Desferrioxamine B promoted-dissolution of goethite appears to be surface-controlled (Cheah et al 2003) and possibly mediated by the formation of dissolutionactive bidentate mononuclear surface structures (Holmen et al 1997;Cocozza et al 2002).…”

Section: Siderophore-promoted Dissolution Of Mn and Fe Mineralsmentioning

confidence: 99%

Coupled biogeochemical cycling of iron and manganese as mediated by microbial siderophores

2009

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Siderophores, biogenic chelating agents that facilitate Fe(III) uptake through the formation of strong complexes, also form strong complexes with Mn(III) and exhibit high reactivity with Mn (hydr)oxides, suggesting a pathway by which Mn may disrupt Fe uptake. In this review, we evaluate the major biogeochemical mechanisms by which Fe and Mn may interact through reactions with microbial siderophores: competition for a limited pool of siderophores, sorption of siderophores and metal-siderophore complexes to mineral surfaces, and competitive metal-siderophore complex formation through parallel mineral dissolution pathways. This rich interweaving of chemical processes gives rise to an intricate tapestry of interactions, particularly in respect to the biogeochemical cycling of Fe and Mn in marine ecosystems.

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Section: Siderophore-promoted Dissolution Of Mn and Fe Mineralsmentioning

confidence: 99%

Coupled biogeochemical cycling of iron and manganese as mediated by microbial siderophores

2009

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“…NaAlO 2 (80 ppm) and NaSiF 6 (−129 ppm) solutions of known concentrations were employed as external standards for 27 Al NMR and 19 F NMR, respectively, acting as the references for chemical shifts and relative peak areas. The concentrations of fluorinated sites and Al species were calculated according to the functional relationships between the concentrations of a series of NaF 27 Al MAS NMR spectra and 19 F MAS NMR spectra were referenced to 1 M Al(NO 3 ) 3 (0 ppm) and CF 2 groups of PTFE (−122 ppm), respectively. The NMR spectra were fitted using Bruker TopSpin 3.2 with the CSA model, considering the sample spinning rate (25 000 Hz), isotropic chemical shift δ(ISO), chemical shift anisotropy δ(CSA), asymmetry factor η(CSA), and line broadening (LB).…”

Section: +mentioning

confidence: 99%

“…19 F MAS NMR spectra were fitted using Table 2). The precipitates exhibited main peaks of η-F (−144 to −146 ppm), μ-F a (−129 to −130 ppm), and μ-F b (−135 to −136 ppm), which represented fluorinated sites on ε-K Al 13 , and minor peaks of fluorinated Al (−152 to −157 ppm).…”

Section: +mentioning

confidence: 99%

“…The reaction products in the filtrates of low concentration samples (Al T : 0.6 mM) were detected by ESI-TOF-MS (ACQUITY UPLC/Xevo G2 Q TOF, Waters, USA). In addition, the filtrates of high concentration samples (Al T : 0.3 M) were qualitatively and quantitatively analyzed using 19 19 F NMR, the total Al concentration of ε-K Al 13 solutions was 0.3 M, and the F concentration was 0.02 M. The first spectrum was acquired at 4.5 min after adding fluoride, and NMR measurement was continued for 1057 min.…”

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confidence: 99%

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Aggregation and Dissociation of Aqueous Al₁₃ Induced by Fluoride Substitution

Wang

Zhang

et al. 2017

Environ. Sci. Technol.

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ABSTRACT:The ε-Keggin ion AlO 4 Al 12 (OH) 24 (H 2 O) 12 7+ (ε-K Al 13 7+ ) is a double-edged sword, because it commonly acts as a toxic component toward aquatic organisms, but also is considered to be an effective coagulant. Gaining deep insight into the transformation of ε-K Al 13 7+ in the presence of coexisting ligands would have significant implications for water environmental science, as well as for practical water purification. The aggregation and dissociation of aqueous Al 13 7+ induced by fluoride (F − ) substitution were herein investigated using nuclear magnetic resonance, electrospray ionization−mass spectrometry, and theoretical calculations. The F − substitution on η-OH 2 sites was extremely fast, reducing the charge of ε-K Al 13 7+ so that the repulsive force between fluorinated Al 13 species was immediately reduced. Consequently, fluorinated Al 13 aggregated, with the formula [Al 13 F 5 ] 2+ , which was demonstrated by calculating the Gibbs free energy changes (Δ r G) of the substitution reactions involved. Moreover, the replacement of η-OH 2 with F − weakened the strength of Al−OH a/b bonds and thus prompted the replacement of μ-OH a/b with F −

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“…They promote iron oxide dissolution by a ligand controlled dissolution mechanism (Reichard et al 2007a), similarly to microbial siderophores (Reichard et al 2007b). The dissolution process is subject to various influences causing synergistic or inhibitory effects including soil pH (Kraemer et al 1999), the presence of organic acids (Reichard et al 2005) or biosurfactants (Carrasco et al 2008).…”

Section: Iron Status In Soil and Rhizospherementioning

confidence: 99%

Iron dynamics in the rhizosphere as a case study for analyzing interactions between soils, plants and microbes

et al. 2009

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International audienceIron is an essential element for plants and microbes. However, in most cultivated soils, the concentration of iron available for these living organisms is very low because its solubility is controlled by stable hydroxides, oxyhydroxides and oxides. In the rhizosphere, there is a high demand of iron because of the iron uptake by plants, and microorganisms which density and activity are promoted by the release of root exudates. Plants and microbes have evolved active strategies of iron uptake. Iron incorporation by these organisms lead to complex interactions ranging from competition to mutualism. These complex interactions are under the control of physico-chemical properties of the soils in which they occur, and reciprocally iron uptake strategies of plants and microbes impact these soil properties. These iron-mediated nteractions between soils, plants and microbes impact the plant growth and health and their analysis, together with that of the resulting iron dynamics, is of a major agronomic interest. Analysis of the complex interactions soils, plants and microbes represent also a unique opportunity to progress in our knowledge of the rhizosphere ecology. This progression requires merging complementary expertises and study strategies in soil science, plant biology and microbiology. This review provides information on (i) iron status in soil and rhizosphere, iron uptake by plants and microbes, and on (ii) the corresponding study strategies. Finally, illustrations of how integration of these approaches allows gaining knowledge in the complex interactions occurring in the rhizosphere are given

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Effects of anionic surfactants on ligand-promoted dissolution of iron and aluminum hydroxides

Cited by 14 publications

References 34 publications

Coupled biogeochemical cycling of iron and manganese as mediated by microbial siderophores

Coupled biogeochemical cycling of iron and manganese as mediated by microbial siderophores

Aggregation and Dissociation of Aqueous Al₁₃ Induced by Fluoride Substitution

Iron dynamics in the rhizosphere as a case study for analyzing interactions between soils, plants and microbes

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Effects of anionic surfactants on ligand-promoted dissolution of iron and aluminum hydroxides

Cited by 14 publications

References 34 publications

Coupled biogeochemical cycling of iron and manganese as mediated by microbial siderophores

Coupled biogeochemical cycling of iron and manganese as mediated by microbial siderophores

Aggregation and Dissociation of Aqueous Al13 Induced by Fluoride Substitution

Iron dynamics in the rhizosphere as a case study for analyzing interactions between soils, plants and microbes

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Aggregation and Dissociation of Aqueous Al₁₃ Induced by Fluoride Substitution