Inorganic and organic P retention by coprecipitation during ferrous iron oxidation

Santoro, Veronica; Martín, María; Persson, Per; Lerda, Cristina; Said-Pullicino, Daniel; Magnacca, Giuliana; Celi, Luisella

doi:10.1016/j.geoderma.2019.04.004

Cited by 25 publications

(17 citation statements)

References 64 publications

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“…This observation is in line with the study on the ecological state of the Wigry National Park water system [104], as well as with the research on phosphorus concentrations and precipitation in the lake environment [132,133]. Moreover, it is known that iron and phosphorus have a tendency to coprecipitate [134]. Manganese, on the other hand, is oxidized more slowly [135,136] and can be transported over longer distances.…”

Section: Resultssupporting

confidence: 73%

Natural and Anthropogenic Origin of Metals in Lacustrine Sediments; Assessment and Consequences—A Case Study of Wigry Lake (Poland)

Kostka

Leśniak

2021

Minerals

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The contamination of aquatic sediments by metals is a worldwide phenomenon and its assessment is a fairly complex issue, as numerous factors affect the distribution of particular contaminants in the environment, as well as their bioavailability. Wigry Lake, as the object of this study, is almost a perfect water body for such considerations. It has been well investigated and densely sampled (up to 459 sediment samples). The quantities of seven metals were determined using the atomic absorption spectrometry (AAS) or inductively coupled plasma (ICP)-MS methods, following previous extraction in a microwave oven. The levels of concentration of the examined elements were as follows (min–max (mg·kg−1)): Cd—0.003–3.060; Cr—0.20–22.61; Cu—0.02–59.70; Fe—80–32,857; Mn—18–1698; Pb—7.0–107.5; Zn—3.1–632.1. Significant differences were also registered in terms of particular metal concentrations in different sediment types found at the lake bottom. Five different geochemical backgrounds and sediment quality guidelines implemented in the study enabled a very scrupulous contamination assessment of the lake sediments’ condition, as well as the evaluation of the natural and anthropogenic contribution to the enrichment of examined sediments in metals. Although Wigry Lake is situated in a pristine region, it is still subject to anthropopressure, which seems to be the lowest in respect to Cr and Mn, while the highest in the case of Pb. The chemoecological state of the lake was ultimately assessed as good. The study highlighted the necessity of an integrated approach to the assessment of contamination or pollution in the course of an environmental research.

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Section: Resultssupporting

confidence: 73%

Natural and Anthropogenic Origin of Metals in Lacustrine Sediments; Assessment and Consequences—A Case Study of Wigry Lake (Poland)

Kostka

Leśniak

2021

Minerals

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“…Phosphorus is absorbed and assimilated by plants as phosphate (Pi), which occurs at fairly low concentrations in the soil solution, typically in the 1-10 µM range [16,[21][22][23]. This is because Pi tends to establish strong interactions with soil colloids (mainly Fe and Al oxides), on which it can be almost irreversibly adsorbed or occluded [24]. The concentrations of available P in soil can thus range from null to values that remain anyway well below the critical level needed for optimal plant growth, which corresponds to tens of µM for the most demanding species [23].…”

Section: Introductionmentioning

confidence: 99%

Strigolactones Control Root System Architecture and Tip Anatomy in Solanum lycopersicum L. Plants under P Starvation

Santoro¹,

Schiavon²,

Gresta³

et al. 2020

Plants

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The hormones strigolactones accumulate in plant roots under phosphorus (P) shortage, inducing variations in plant phenotype. In this study, we aimed at understanding whether strigolactones control morphological and anatomical changes in tomato (Solanum lycopersicum L.) roots under varying P supply. Root traits were evaluated in wild-type seedlings grown in high vs. low P, with or without exogenous strigolactones, and in wild-type and strigolactone-depleted plants grown first under high vs. no P, and then under high vs. no P after acclimation on low P. Exogenous strigolactones stimulated primary root and lateral root number under low P. Root growth was reduced in strigolactone-depleted plants maintained under continuous P deprivation. Total root and root hair length, lateral root number and root tip anatomy were impaired by low strigolactone biosynthesis in plants grown under low P or transferred from low to no P. Under adequate P conditions, root traits of strigolactone-depleted and wild-type plants were similar. Concluding, our results indicate that strigolactones (i) control macro- and microscopic changes of root in tomato depending on P supply; and (ii) do not affect root traits significantly when plants are supplemented with adequate P, but are needed for acclimation to no P and typical responses to low P.

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“…A recent laboratory study also found that phosphate can be occluded by ferrihydrite aggregates. 51 The Fe/Al oxides must be poorly crystallized rather than well-crystallized because only the former can be readily dissolved by D-HCl. 52 Significant correlations between D-HCl-Fe and Fe ox and D-HCl-Al and (Table S5) also support the proposition of the dissolution of poorly crystalline minerals during the D-HCl extraction.…”

Section: ■ Discussionmentioning

confidence: 99%

Quantifying Uncertainties in Sequential Chemical Extraction of Soil Phosphorus Using XANES Spectroscopy

Dam

Hart

et al. 2020

Environ. Sci. Technol.

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Sequential chemical extraction has been widely used to study soil phosphorus (P) dynamics and inform nutrient management, but its efficacy for assigning P into biologically meaningful pools remains unknown. Here, we evaluated the accuracy of the modified Hedley extraction scheme using P K-edge X-ray absorption near-edge structure (XANES) spectroscopy for nine carbonate-free soil samples with diverse chemical and mineralogical properties resulting from different degrees of soil development. For most samples, the extraction markedly overestimated the pool size of calcium-bound P (Ca-P, extracted by 1 M HCl) due to (1) P redistribution during the alkaline extractions (0.5 M NaHCO 3 and then 0.1 M NaOH), creating new CaP via formation of Ca phosphates between NaOH-desorbed phosphate and exchangeable Ca 2+ and/or (2) dissolution of poorly crystalline Fe and Al oxides by 1 M HCl, releasing P occluded by these oxides into solution. The first mechanism may occur in soils rich in well-crystallized minerals and exchangeable Ca 2+ regardless of the presence or absence of CaCO 3 , whereas the second mechanism likely operates in soils rich in poorly crystalline Fe and Al minerals. The overestimation of CaP simultaneously caused underestimation of the pools extracted by the alkaline solutions. Our findings identify key edaphic parameters that remarkably influenced the extractions, which will strengthen our understanding of soil P dynamics using this widely accepted procedure.

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Inorganic and organic P retention by coprecipitation during ferrous iron oxidation

Cited by 25 publications

References 64 publications

Natural and Anthropogenic Origin of Metals in Lacustrine Sediments; Assessment and Consequences—A Case Study of Wigry Lake (Poland)

Natural and Anthropogenic Origin of Metals in Lacustrine Sediments; Assessment and Consequences—A Case Study of Wigry Lake (Poland)

Strigolactones Control Root System Architecture and Tip Anatomy in Solanum lycopersicum L. Plants under P Starvation

Quantifying Uncertainties in Sequential Chemical Extraction of Soil Phosphorus Using XANES Spectroscopy

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