The influence of weathering and soil organic matter on Zn isotopes in soils

Opfergelt, Sophie; Cornélis, Jean-Thomas; Houben, David; Givron, Claudine; Burton, Kevin W.; Mattielli, Nadine

doi:10.1016/j.chemgeo.2017.06.002

Cited by 39 publications

(30 citation statements)

References 103 publications

(149 reference statements)

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“…That result was accordance with Arvind et al (2017) who reported that the effects of random factors on available micronutrients have been gradually increasing [7]. The spatial distribution of very high levels (>5 mg·kg −1 ) of available Zn was also uneven in both 2007 and 2017; that is in line with the result of Opfergelt et al (2017), who found that the distribution of micronutrients was affected by soil matrix, geomorphology and special fertilization measures [24]. In addition, the expansions of areas with high-levels of soil micronutrients were mainly caused by increases in fertilizer input and land-use changes [25].…”

Section: Spatial Variability Of Available Micronutrientssupporting

confidence: 91%

Spatio-Temporal Variability and the Factors Influencing Soil-Available Heavy Metal Micronutrients in Different Agricultural Sub-Catchments

Zhuo

Xing

et al. 2019

Sustainability

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Information on the spatial variability of soil-available micronutrients is important for farming and soil management practices. As current knowledge of factors influencing soil available micro-nutrients in the long-term scales is limited, we analyzed 821 and 812 representative surface (0-20 cm) soil samples from five sub-catchments in the Ping Gu intermontane basin in Beijing, China in 2007 and 2017. The objectives of this study were to assess the temporal and spatial distribution characteristics of soil-available micronutrients (Cu, Zn, Fe and Mn) and their relationships with soil's chemical properties. The concentration of available Cu ranged from 1-2 mg·kg −1 distributing over a large area in 2007, but it was more than 2 mg·kg −1 in the hilly regions in 2017. The concentration of available Zn (>5 mg·kg −1 ) increased significantly from 2007 to 2017, and showed an uneven distribution. The distribution of available Fe and Mn decreased from the northeast to the southwest region of the study area between 2007 and 2017, this being consistent with the topography in this area. Soil's available P (AP) had a higher contribution to available Cu and Zn in different sub-catchments. In addition, soil pH had a significant negative influence on available Fe in sub-catchments 1, 2 and 3, and on available Mn in all sub-catchments, except for sub-catchment 4. Moreover, the effects of soil chemical properties on soil-available micronutrients increased in each sub-catchment from 2007 to 2017. We conclude that differences in soil properties and land-use types were the main reasons for the spatial variability of soil-available micronutrients in the Ping Gu intermontane basin.

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Section: Spatial Variability Of Available Micronutrientssupporting

confidence: 91%

Spatio-Temporal Variability and the Factors Influencing Soil-Available Heavy Metal Micronutrients in Different Agricultural Sub-Catchments

Zhuo

Xing

et al. 2019

Sustainability

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“…1), including the parent basalt from the BA site, and the grass-type vegetation (hummocky grassland, bulk shoot part) was sampled in (IUSS, 2014). The soil map is based on Arnalds (2004) and Arnalds and Gretarsson (2001 (Opfergelt et al, 2014;Siebert et al, 2015;Opfergelt et al, 2017). The five soil profiles can be divided into two groups as a function of drainage: the freely drained soils V-BA-GA and the poorly drained soils HA-H. Profiles V, BA, and GA are characterised by a neutral pH and a low organic carbon content (pH 6.7 ± 0.7; 5.4 ± 2.9% C; Table 1), in contrast to profiles HA and H which are acidic and organic rich soils (pH 4.8 ± 0.6; 21 ± 9% C; Table 1; Opfergelt et al, 2014).…”

Section: Soil Sampling and Characterisationmentioning

confidence: 99%

Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands

Opfergelt

Williams

Cornélis

et al. 2017

Geochimica et Cosmochimica Acta

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Incipient warming of peatlands at high latitudes is expected to modify soil drainage and hence the redox conditions, which has implications for Fe export from soils. This study uses Fe isotopes to assess the processes controlling Fe export in a range of Icelandic soils including peat soils derived from the same parent basalt, where Fe isotope variations principally reflect differences in weathering and drainage. In poorly weathered, well-drained soils (non-peat soils), the limited Fe isotope fractionation in soil solutions relative to the bulk soil (D 57 Fe solution-soil = À0.11 ± 0.12‰) is attributed to proton-promoted mineral dissolution. In the more weathered poorly drained soils (peat soils), the soil solutions are usually lighter than the bulk soil (D 57 Fe solution-soil = À0.41 ± 0.32‰), which indicates that Fe has been mobilised by reductive mineral dissolution and/or ligand-controlled dissolution. The results highlight the presence of Fe-organic complexes in solution in anoxic conditions. An additional constraint on soil weathering is provided by Si isotopes. The Si isotope composition of the soil solutions relative to the soil (D 30 Si solution-soil = 0.92 ± 0.26‰) generally reflects the incorporation of light Si isotopes in secondary aluminosilicates. Under anoxic conditions in peat soils, the largest Si isotope fractionation in soil solutions relative to the bulk soil is observed (D 30 Si solution-soil = 1.63 ± 0.40‰) and attributed to the cumulative contribution of secondary clay minerals and amorphous silica precipitation. Si supersaturation in solution with respect to amorphous silica is reached upon freezing when Al availability to form aluminosilicates is limited by the affinity of Al for metal-organic complexes. Therefore, the precipitation of amorphous silica in peat soils indirectly supports the formation of metal-organic complexes in poorly drained soils. These observations highlight that in a scenario of decreasing soil drainage with warming high latitude peatlands, Fe export from soils as Fe-organic complexes will increase, which in turn has implications for Fe transport in rivers, and ultimately the delivery of Fe to the oceans.

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“…It has been shown that pedogenetic processes alter Zn and Cu isotopic signatures through post-deposition fractionation (Juillot et al, 2011;Šillerová et al, 2017;Weiss et al, 2008) that with time, may compromise the identification of metal-sources. This post-deposition fractionation is caused by plant uptake of Zn and Cu depleting the soil in light isotopes (Aucour et al, 2015;Jouvin et al, 2012;Viers et al, 2007;Weinstein et al, 2011) and by metal-sorption to soil particles such as Fe-Mn oxides (Balistrieri et al, 2008;Bigalke et al, 2011;Bryan et al, 2015;Juillot et al, 2008;Pokrovsky et al, 2008Pokrovsky et al, , 2005 or organic matter (Jouvin et al, 2009;Opfergelt et al, 2017) favoring heavy isotope enrichments in soils.…”

Section: Introductionmentioning

confidence: 99%

Lead, zinc, and copper redistributions in soils along a deposition gradient from emissions of a Pb-Ag smelter decommissioned 100 years ago

Gelly

Fekiacova

Guihou

et al. 2019

Science of The Total Environment

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Sourcing and understanding the fate of anthropogenic metals in a historical contamination context is challenging. Here we combined elemental and isotopic (Pb, Zn, Cu) analyses with X-ray absorption spectroscopy (XAS) measurements (Zn) to trace the fate, in undisturbed soil profiles, of historical metal contamination emitted by a 167-year-old Pb-Ag smelter decommissioned 100 years ago located in the Calanques National Park (Marseilles, France). Lead isotopic measurements show that entire soil profiles were affected by 74 years of Pb emissions up to ~7 km from the smelter under the main NNW wind, and indicate particulate transfer down to 0.8 m at depth. This vertical mobility of anthropogenic Pb contrasts with previous studies where Pb was immobilized in surface horizons. The contribution of anthropogenic Pb to the total Pb concentration in soils was estimated at 95% in surface horizons, and 78% in the deepest horizons. Zinc isotopic signatures of past emissions, that are enriched in light isotopes compared to the natural geological background (-0.69 ±0.03‰ and-0.15 ±0.02‰, respectively), were detected only in the surface horizons of the studied soils. Using XAS analyses, we showed that anthropogenic Zn was transformed and immobilized in surface horizons as Zn-Layered Double Hydroxide, thus favoring the enrichment in heavy isotopes in these surface horizons. No clear evidence of copper contamination by the smelter was found and Cu isotopes point to a bedrock origin and a natural distribution of Cu concentrations. Highlights: • δPb, Zn, Cu in soils impacted by emissions 100 y ago from a smelter • Pb contamination was detected 7 km away from the smelter and down the soil profiles • Light δ 66 Zn values were measured in the chimney and in soil surface horizons • Precipitation of Zn-Layered Double Hydroxide prevented downwards migration of anthropogenic Zn • Cu isotopes indicate its geogenic origin and redistribution in soils by pedogenesis

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The influence of weathering and soil organic matter on Zn isotopes in soils

Cited by 39 publications

References 103 publications

Spatio-Temporal Variability and the Factors Influencing Soil-Available Heavy Metal Micronutrients in Different Agricultural Sub-Catchments

Spatio-Temporal Variability and the Factors Influencing Soil-Available Heavy Metal Micronutrients in Different Agricultural Sub-Catchments

Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands

Lead, zinc, and copper redistributions in soils along a deposition gradient from emissions of a Pb-Ag smelter decommissioned 100 years ago

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The influence of weathering and soil organic matter on Zn isotopes in soils

Cited by 39 publications

References 103 publications

Spatio-Temporal Variability and the Factors Influencing Soil-Available Heavy Metal Micronutrients in Different Agricultural Sub-Catchments

Spatio-Temporal Variability and the Factors Influencing Soil-Available Heavy Metal Micronutrients in Different Agricultural Sub-Catchments

Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands

Lead, zinc, and copper redistributions in soils along a deposition gradient from emissions of a Pb-Ag smelter decommissioned 100 years ago

Contact Info

Product

Resources

About

Lead, zinc, and copper redistributions in soils along a deposition gradient from emissions of a Pb-Ag smelter decommissioned 100 years ago