Interactions between natural organic matter, sulfur, arsenic and iron oxides in re-oxidation compounds within riparian wetlands: NanoSIMS and X-ray adsorption spectroscopy evidences

Al-Sid-Cheikh, Maya; Pédrot, Mathieu; Dia, Aline; Guénet, Hélène; Vantelon, Delphine; Davranche, Mélanie; Gruau, Gérard; Delhaye, Thomas

doi:10.1016/j.scitotenv.2015.02.047

Cited by 45 publications

(24 citation statements)

References 69 publications

(88 reference statements)

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“…Our high resolution synchrotron nano-XRF measurements show that Fe not only deposits in the epidermis, but also has considerable deposition around the Casparian strip in the endodermis. Previous studies also suggested that Fe plaque could serve as a barrier preventing metals from entering plant roots373839, while others suggested that Fe plaque should not be the main barrier10. Our results show significant ( p < 0.05) correlations between the metals (As, Ca, Cr, Mn and Zn) and Fe in both epidermal and endodermal root tissue (Fig.…”

Section: Discussionsupporting

confidence: 69%

Nanoscale measurement of trace element distributions in Spartina alterniflora root tissue during dormancy

Feng

Cochran

et al. 2017

Sci Rep

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This paper reports a nanometer-scale investigation of trace element (As, Ca, Cr, Cu, Fe, Mn, Ni, S and Zn) distributions in the root system Spartina alterniflora during dormancy. The sample was collected on a salt marsh island in Jamaica Bay, New York, in April 2015 and the root was cross-sectioned with 10 μm resolution. Synchrotron X-ray nanofluorescence was applied to map the trace element distributions in selected areas of the root epidermis and endodermis. The sampling resolution was 60 nm to increase the measurement accuracy and reduce the uncertainty. The results indicate that the elemental concentrations in the epidermis, outer endodermis and inner endodermis are significantly (p < 0.01) different. The root endodermis has relatively higher concentrations of these elements than the root epidermis. Furthermore, this high resolution measurement indicates that the elemental concentrations in the outer endodermis are significantly (p < 0.01) higher than those in the inner endodermis. These results suggest that the Casparian strip may play a role in governing the aplastic transport of these elements. Pearson correlation analysis on the average concentrations of each element in the selected areas shows that most of the elements are significantly (p < 0.05) correlated, which suggests that these elements may share the same transport pathways.

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Section: Discussionsupporting

confidence: 69%

Nanoscale measurement of trace element distributions in Spartina alterniflora root tissue during dormancy

Feng

Cochran

et al. 2017

Sci Rep

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“…Given the strong affinity As has for iron (oxyhydr) oxides (Al-Sid-Cheikh et al, 2015;Gu et al, 1994), longterm As cycling in a salt marsh is likely dominated by the redox potential. As the redox potential decreases, usually due to increasing water level, the iron (oxyhydr) oxides will be reductively dissolved (Olivie-Lauquet et al, 2001).…”

Section: Long-term Implicationsmentioning

confidence: 99%

“…Arsenic is a ubiquitous toxin that occurs naturally or anthropogenically in the environment, and its cycling is largely driven by redox state. Under oxic conditions, As is usually strongly attenuated in soil because of its high affinity for iron (oxyhydr) oxides, manganese and aluminum oxides, and 2:1 phyllosilicate clays, depending on the As speciation (Al‐Sid‐Cheikh et al, ; Gu et al, ; Wu et al, ). Under suboxic conditions, the iron (oxyhydr) oxides and manganese oxides are reductively dissolved, releasing the previously sorbed As to interstitial pore water (Olivie‐Lauquet et al, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of Extreme Events on Arsenic Cycling in Salt Marshes

2018

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Extreme events such as storm surges, intense precipitation, and supermoons cause anomalous and large fluctuations in water level in tidal salt marshes, which impacts the sediment biogeochemistry that dictates arsenic (As) cycling. In addition to changes in water level, which impacts soil redox potential, these extreme events may also change salinity due to freshwater inputs from precipitation or saltwater inputs due to surge. It is currently unknown how As mobility in tidal salt marshes will be impacted by extreme events, as fluctuations in salinity and redox potential may act synergistically to mobilize As. To investigate impacts of extreme events on As cycling in tidal salt marshes, we conducted a combined laboratory and field investigation. We monitored pore water and soil samples before, during, and after two extreme events: a supermoon lunar eclipse followed by a storm surge and precipitation induced by Hurricane Joaquin in fall 2015 at the St. Jones Reserve in Dover, Delaware, a representative tidal salt marsh in the Mid‐Atlantic United States. We also conducted soil incubations of marsh sediments in batch and in flow‐through experiments in which redox potential and/or salinity were manipulated. Field investigations showed that pore water As was inversely proportional to redox potential. During the extreme events, a distinct pulse of As was observed in the pore water with maximum salinity. Combined field and laboratory investigations revealed that this As pulse is likely due to rapid changes in salinity. These results have implications for As mobility in the face of extreme weather variability.

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“…, Al‐Sid‐Cheikh et al . ). This study is a follow‐up to the SLRS‐4 and SLRS‐5 compilations performed by laboratories within the framework of the CNRS (French National Centre for Scientific Research) ‘ISOTRACE’ network (Yeghicheyan et al .…”

mentioning

confidence: 97%

A New Interlaboratory Characterisation of Silicon, Rare Earth Elements and Twenty‐Two Other Trace Element Concentrations in the Natural River Water Certified Reference Material SLRS‐6 (NRC‐CNRC)

Yeghicheyan

Aubert

Coz

et al. 2019

Geostandard Geoanalytic Res

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The natural river water reference material SLRS‐6 (NRC‐CNRC) is the newest batch of a quality control material routinely used in many international environmental laboratories. This work presents a nine‐laboratory compilation of measurements of major and trace element concentrations and their related uncertainties, unavailable in the NRC‐CNRC certificate (B, Cs, Li, Ga, Ge, Hf, Nb, P, Rb, Rh, Re, S, Sc, Se, Si, Sn, Th, Ti, Tl, W, Y, Y, Zr and REEs). Measurements were mostly made using inductively coupled plasma‐mass spectrometry. The results are compared with equivalent data for the last batch of the material, SLRS‐5, measured simultaneously with SLRS‐6 in this study. In general, very low concentrations, close to the quantification limits, were found in the new batch. The Sr isotopic ratio is also reported.

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Interactions between natural organic matter, sulfur, arsenic and iron oxides in re-oxidation compounds within riparian wetlands: NanoSIMS and X-ray adsorption spectroscopy evidences

Cited by 45 publications

References 69 publications

Nanoscale measurement of trace element distributions in Spartina alterniflora root tissue during dormancy

Nanoscale measurement of trace element distributions in Spartina alterniflora root tissue during dormancy

Effects of Extreme Events on Arsenic Cycling in Salt Marshes

A New Interlaboratory Characterisation of Silicon, Rare Earth Elements and Twenty‐Two Other Trace Element Concentrations in the Natural River Water Certified Reference Material SLRS‐6 (NRC‐CNRC)

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