Soil properties controlling Zn speciation and fractionation in contaminated soils

Jacquat, Olivier; Voegelin, Andreas; Kretzschmar, Ruben

doi:10.1016/j.gca.2009.05.066

Cited by 89 publications

(88 citation statements)

References 61 publications

(112 reference statements)

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“…A series of ZnMg-kerolites with variable Zn and Mg contents included ''Znkerolite", ''Zn 0.8 Mg 0.2 -kerolite", ''Zn 0.6 Mg 0.4 -kerolite", ''Zn 0.34 Mg 0.66 -kerolite", and ''Zn 0.06 Mg 0.94 -kerolite") . References for adsorbed and complexed Zn-species included, amongst others, ''Zn-phytate", ''Zn-sorbed calcite", ''Znsorbed ferrihydrite", ''low Zn-birnessite" and ''Zn-sorbed talc" for which details have been provided in earlier studies (Jacquat et al, , 2009b.…”

Section: Reference Compounds For Exafs Spectroscopymentioning

confidence: 99%

“…In contrast, specific sorption of Zn in the Al-hydroxy interlayers of hydroxy-interlayered minerals (HIM) was found to be an important Zn uptake mechanism in (mostly acidic) HIM-containing soils at low to moderate contamination levels Jacquat et al, 2009a). Thus, several recently identified layered Zn phases are quantitatively relevant in contaminated soils, their occurrence depending on soil pH, the level of Zn contamination, and the abundance of organic and mineral sorbent phases (Jacquat et al, 2009b).…”

Section: Introductionmentioning

confidence: 99%

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Changes in Zn speciation during soil formation from Zn-rich limestones

Jacquat

Voegelin

Juillot

et al. 2009

Geochimica et Cosmochimica Acta

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Section: Reference Compounds For Exafs Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Changes in Zn speciation during soil formation from Zn-rich limestones

Jacquat

Voegelin

Juillot

et al. 2009

Geochimica et Cosmochimica Acta

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“…Commonly observed minerals include zinc carbonate minerals (smithsonite ZnCO 3 and hydrozincite Zn 5 (CO 3 ) 2 (OH) 6 ) and zinc silicate minerals like hemimorphite (Zn 4 Si 2 O 7 (OH) 2 ·H 2 O) (Boni et al, 2005;Balassone et al, 2008;Jacquat et al, 2008Jacquat et al, , 2009. In acid mine drainage systems and smelter-impacted soils, zinc-iron and zinc-aluminium spinels namely franklinite (ZnFe 2 O 4 ) and gahnite (ZnAl 2 O 4 ) are found as well as the zinc oxide zincite (ZnO) (Kucha et al, 1996;Hochella et al, 1999;Sobanska, 1999;Juillot et al, 2003;Jacquat et al, 2009;Juillot et al, 2011). Steger and Desjardins (1980) show that oxidation of sphalerite could result in the formation of hydrated zinc sulfate, which could be gunningite (ZnSO 4 ·H 2 O) (Jambor and Boyle, 1962).…”

Section: Introductionmentioning

confidence: 99%

Equilibrium zinc isotope fractionation in Zn-bearing minerals from first-principles calculations

2016

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Isotopic composition analysis contributes significantly to the investigation of the biogeochemical cycle of zinc with its economical, environmental and health implications. Interpretation of isotopic measurements is however hindered by the lack of a set of equilibrium isotopic fractionation factors between Zn-bearing minerals. In this study, equilibrium mass-dependent Zn isotope fractionation factors in Zn-bearing minerals are determined from first-principles calculations within the density functional theory (DFT) scheme. A wide range of minerals belonging to sulfide, carbonate, oxide, silicate, sulfate and arsenate mineral groups are modelled to account for the natural diversity of Zn crystal-chemical environment. Calculated reduced partition function ratios (β-factors) span a range smaller than 2 at 22 • C. All studied secondary minerals (adamite, gahnite, gunningite, hemimorphite, hydrozincite, zincite) but zinc carbonate (smithsonite) are isotopically heavier than zinc sulfide minerals (sphalerite and wurtzite) from which they could form through supergene processes. Zinc-aluminium spinel and zinc silicate are the isotopically heaviest minerals. The investigation of the crystalchemical parameters at the origin of differences in isotopic properties shows an excellent linear correlation between ln β and Zn interatomic force constants. β-factors are also observed to increase when the Zn-first neighbour bond lengths decrease and charges on atoms involved in the bonding increase and vice versa. These findings are in line with the observation of heavy isotope enrichment in systems having the largest bond strength.

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“…2 )/R i (E exp ) 2 ) of the target transforms were used to judge the suitability of reference spectra for LCF (Isaure et al 2002;Jacquat et al 2009c;Kirpichtchikova et al 2006;Panfili et al 2005;Sarret et al 2004). LCF analysis was performed over the energy range 9,643-9,743 eV (-20 to ?80 eV around E 0 fixed at 9,663 eV) and was carried using software from beamline 10.3.2 at the Advanced Light Source ).…”

Section: Analysis Of Zn K-edge Xanes Datamentioning

confidence: 99%

Origin of high Zn contents in Jurassic limestone of the Jura mountain range and the Burgundy: evidence from Zn speciation and distribution

et al. 2011

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In order to better understand the origin and enrichment mechanisms leading to elevated Zn concentrations in Jurassic limestone of the Jura mountain range (JMR) and the Burgundy (B), we investigated four locations of Bajocian age (JMR: Lausen-Schleifenberg, Gurnigel; B: Vergisson-Davayé, Lucy-le-Bois) and two locations of Oxfordian age (JMR: Dornach, Pichoux) for their Zn distribution and speciation. Measurements of the acid-extractable and bulk Zn contents showed that Zn is stratigraphically and spatially heterogeneously distributed, in association with permeable carbonate levels. Up to 3,580 and 207 mg/kg Zn was detected in Bajocian and Oxfordian limestone, respectively, with numerous limestone samples having Zn contents above 50 mg/kg. Using X-ray absorption near edge structure spectroscopy and micro-X-ray fluorescence spectrometry, the speciation and microscale distribution of Zn was investigated for selected limestone samples. In Bajocian limestone sphalerite and/or Zn-substituted goethite and a minor fraction of Zn-bearing carbonates were identified. In contrast, Zn-bearing carbonates (Zn-substituted calcite and hydrozincite) were accounting for most of the total Zn in Oxfordian limestone. The micro-scale distribution of Zn for Bajocian and Oxfordian limestone was however similar with localized Zn-rich zones in the limestone cement and at the rim of oolites. The stratigraphic sporadicity and microscale heterogeneity of the Zn distribution together with the Zn speciation results point to a hydrothermal origin of Zn. Occurence of Zn-goethite is probably linked to the oxidative transformation of framboidal pyrite and hydrothermal sphalerite in contact with meteoritic waters. Difference in speciation between Bajocian limestone and Oxfordian limestone may be related to differences in rock permeability Geosci (2011) 104:409-424 DOI 10.1007 and/or to various hydrothermal events. Isotopic dating of the different mineralizations will be needed to decipher differences in Zn speciation and the precise chronology of hydrothermal episodes.

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Soil properties controlling Zn speciation and fractionation in contaminated soils

Cited by 89 publications

References 61 publications

Changes in Zn speciation during soil formation from Zn-rich limestones

Changes in Zn speciation during soil formation from Zn-rich limestones

Equilibrium zinc isotope fractionation in Zn-bearing minerals from first-principles calculations

Origin of high Zn contents in Jurassic limestone of the Jura mountain range and the Burgundy: evidence from Zn speciation and distribution

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