Spatial statistical modeling of arsenic accumulation in microsites of diverse soils

Sharma, Aakriti; Guinness, Joseph; Muyskens, Amanda; Polizzotto, Matthew L.; Fuentes, Montserrat; Hesterberg, Dean

doi:10.1016/j.geoderma.2022.115697

Cited by 5 publications

(3 citation statements)

References 89 publications

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“…A study of the chemical elements and solids that contribute to As binding in matrices of soil samples from different pedogenic environments at the micrometer spatial scale has been reported. 48 Arsenic was reacted with and imaged within thin weathering coatings on eight quartz sand grains separated from soils with different drainage and varying levels of Fe and Al (hydr)oxides, OC, and other elements. The grains were analysed using μXRF imaging and μXANES spectroscopy before and after treatment with 0.1 mmol L −1 As V solution.…”

Section: Elemental Speciation Analysismentioning

confidence: 99%

Atomic spectrometry update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2023

J. Anal. At. Spectrom.

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Section: Elemental Speciation Analysismentioning

confidence: 99%

Atomic spectrometry update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2023

J. Anal. At. Spectrom.

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“…As a side effect of mining activities, huge amounts of excavated material are accumulated in waste heaps where the mineral substrates in such environments are characterised by low water-holding capacity, poor nutrient concentrations, or high temperatures. These unusual chemical and physical properties create a harsh and unfavourable condition for the colonisation and growth of plants [26][27][28]. Interestingly, these novel ecosystems provide an opportunity to study the processes of primary succession on a substrate with very low initial biological activity and the build-up of relationships between soil microorganisms and plants [29].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Plant Diversity and Soil Properties on Soil Microbial Biomass and Activity in a Novel Ecosystem

et al. 2023

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Plant–microbial relations have not yet been fully disclosed in natural or seminatural ecosystems, nor in novel ecosystems developing spontaneously on post-coal mine heaps. The aim of this study was to determine which factor, biotic (plant taxonomic diversity vs. plant functional diversity) or abiotic (physicochemical substrate parameters), affects the biomass of soil microbial communities the most, as well as soil in situ respiration in novel ecosystems. The study was carried out on unreclaimed plots selected according to four different combinations of taxonomic and functional plant diversity. Additionally, plots on a reclaimed heap served as a comparison between the two management types. The biomass of several soil microbial groups was analysed using phospholipid fatty acids profiles. We detected that soil microbial biomass was more impacted by abiotic parameters (explaining 23% of variance) than plant diversity (explaining 12% of variance). Particularly, we observed that substrate pH was the most important factor shaping microbial community biomass, as shown in the RDA analysis. The highest microbial biomass was found in plots with low taxonomic and functional diversity. This finding can be explained by the fact that these plots represented a more advanced phase of vegetation development in the early stages of plant succession.

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“…Accordingly, researchers have used XANES to study the relationship between As speciation and co-localized elements in soils, the dispersion of As species in plant roots, and the metabolism of arsenic-based chemotherapeutics in tumor cells. [23][24][25][26] These studies derive their sensitivity from the so-called white line feature, which is an intense spectral feature just above the absorption edge. The position of the white line feature is known to be strongly dependent on the speciation of the measured compound, especially its oxidation state and the elemental identity of any neighboring atoms.…”

Section: Introductionmentioning

confidence: 99%