Complexation of Pb(II) at the goethite (α-FeOOH)/water interface: The influence of chloride

Gunneriusson, Lars; Lövgren, Lars; Sjöberg, Staffan

doi:10.1016/0016-7037(94)90225-9

Cited by 89 publications

(46 citation statements)

References 23 publications

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“…In this study, however, the desorbed phase was continually removed from the reaction vessel. Gunneriusson (1994) and Gunneriusson et al (1994) reported complete reversibility of sorbed Pb and Cd on goethite. In the above studies, inner-sphere complexes were inferred in the original sorbed phases using either extended X-ray absorption fine structure spectroscopy (EXAFS) or the constant capaci tance model.…”

Section: Sequential Metal Additionmentioning

confidence: 99%

Sequential sorption of lead and cadmium in three tropical soils

Appel

Lena

Rhue

et al. 2008

Environmental Pollution

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The sorption and desorption of Pb and Cd in tropical soils is strongly influenced by the order in which these metals enter the soil environment. AbstractIt is important to examine mechanisms of Pb and Cd sorption in soils to understand their bioavailability. The ability of three tropical soils to retain Pb, Cd, and Ca was evaluated. The objectives of this study were to (1) determine the extent to which soil sorption sites are metal specific, (2) investigate the nature of reactions between metals and soil surfaces, and (3) identify how metals compete for sorption sites when they are introduced to soils sequentially or concurrently. Lead was shown to be much less exchangeable than Cd and inhibited Cd sorption. Cadmium had little effect on Pb sorption, though both Ca and Cd inhibited the adsorption of Pb at exchange sites. Lead appears to more readily undergo innersphere surface complexation with soil surface functional groups than either Cd or Ca. Thus, regardless of when Pb is introduced to a soil, it should be less labile than Cd.

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Section: Sequential Metal Additionmentioning

confidence: 99%

Sequential sorption of lead and cadmium in three tropical soils

Appel

Lena

Rhue

et al. 2008

Environmental Pollution

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“…In the absence of an organic ligand, Pb is known to adsorb strongly to goethite with increasing pH (Hayes and Leckie, 1986;Roe et al, 1991;Müller and Sigg, 1992;Kooner, 1993;Rodda et al, 1993;Gunneriusson et al, 1994). Figure 2 (square symbols) indicates that pH 50 Ϸ 5.5 and, at pH Ͼ 7, all Pb added is adsorbed.…”

Section: Adsorption Of Leadmentioning

confidence: 99%

“…These relatively high stability constants, together with the common occurrence of siderophores in soil environments, suggest that siderophores could potentially have impact on the transport and mobility of trace metals other than Fe(III). To explore this possibility, some of our experiments included adsorbed Pb(II) as a typical hazardous trace metal whose surface complexation reactions with goethite have been investigated extensively (e.g., Müller and Sigg, 1992;Rodda et al, 1993;Gunneriusson et al, 1994;Bargar et al, 1997), and for which formation constants of Pb(II)-desferrioxamine B complexes in aqueous solution are available . Our new results, pertaining to the effect of a hydroxamate siderophore on adsorbed Pb(II), are relevant to hazardous metal waste recovery and remediation in soils (Brainard et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Effect of hydroxamate siderophores on Fe release and Pb(II) adsorption by goethite

Kraemer

Cheah

Zapf

et al. 1999

Geochimica et Cosmochimica Acta

124

107

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Abstract-Hydroxamate siderophores are biologically-synthesized, Fe(III)-specific ligands which are common in soil environments. In this paper, we report an investigation of their adsorption by the iron oxyhydroxide, goethite; their influence on goethite dissolution kinetics; and their ability to affect Pb(II) adsorption by the goethite surface. The siderophores used were desferrioxamine B (DFO-B), a fungal siderophore, and desferrioxamine D 1 , an acetyl derivative of DFO-B (DFO-D1). Siderophore adsorption isotherms yielded maximum surface concentrations of 1.5 (DFO-B) or 3.5 (DFO-D1) mol/g at pH 6.6, whereas adsorption envelopes showed either cation-like (DFO-B) or ligand-like (DFO-D1) behavior. Above pH 8, the adsorbed concentrations of both siderophores were similar. The dissolution rate of goethite in the presence of 240 M DFO-B or DFO-D1 was 0.02 or 0.17 mol/g hr, respectively. Comparison of these results with related literature data on the reactions between goethite and acetohydroxamic acid, a monohydroxamate ligand, suggested that the three hydroxamate groups in DFO-D1 coordinate to Fe(III) surface sites relatively independently. The results also demonstrated a significant depleting effect of 240 M DFO-B or DFO-D1 on Pb(II) adsorption by goethite at pH Ͼ 6.5, but there was no effect of adsorbed Pb(II) on the goethite dissolution rate.

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“…Because lead is also hazardous metal for organisms and its contaminant in soils are derived from industrial and mining drainage, adsorption of Pb(II) on minerals have been extensively studied by macroscopic and microscopic methods at acidic and neutral pH conditions. [1][2][3][4][5][6][7][8][9][10][11][12] Most of these studies indicated Pb(II) adsorbed on mineral surfaces (goethite and alumina) as inner-sphere surface complex form at neutral pH conditions. But there is no adsorption study at high pH conditions.…”

Section: Introductionmentioning

confidence: 99%