Ruth H. Ellerbrock

Analyzing the share of amorphous silica in mixtures with different soil minerals using fourier transform infrared spectroscopy and PLSR chemometrics

Oliver Hunfeld, Ruth H. Ellerbrock, Mathias Stein, Carsten W. Müller et autres

Amorphous silica (ASi) improves key soil functions and crop productivity but is difficult to quantify due to complex mineral mixtures and time-consuming chemical analyses. This study explored the possibility of using Fourier-transform infrared spectroscopy (FTIR) in combination with partial least-squares regression (PLSR) …

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Effects of Polyvalent Cations on FTIR Spectra of Organic Matter–Cation Associations

Nisha Bhattarai, Ruth H. Ellerbrock, Horst H. Gerke

ABSTRACT Background The composition of soil organic matter (SOM) can be characterized by functional groups in the organic matter (OM). The carboxylic acid and carboxylate groups of OM show specific absorption bands in Fourier‐transform infrared (FTIR) spectra. However, cation–OM interactions may affect …

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Comparing and quantifying goethite, hematite, lepidocrocite, and ferrihydrite by FTIR

Ruth H. Ellerbrock, Nisha Bhattarai, Jörg Schaller

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Analyzing the share of amorphous silica in mixtures with different soil minerals using Fourier transform infrared spectroscopy and PLSR chemometrics

Oliver Hunfeld, Ruth H. Ellerbrock, Mathias Stein, Carsten W. Müller et autres

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FTIR-derived soil degradation indices and stochastic modelling of organic matter–sediment dynamics in a Mediterranean watershed: A Northern Apennines case study

Manuel La Licata, Odunayo David Adeniyi, Ruth H. Ellerbrock, Nisha Bhattarai et autres

In this study we explored the relationships between Soil Organic Matter (SOM) properties, serving as potential indicators of soil degradation and erosion, and environmental, geomorphic, and hydrological characteristics in an agricultural-forested Mediterranean watershed. SOM composition of fluvial sediments sampled across the watershed …

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Enhanced CO 2 Emissions Driven by Flooding in a Simulation of Palsa Degradation

Mélissa Laurent, Mackenzie R. Baysinger, Jörg Schaller, Matthias Lück et autres

Abstract. Climate change is predicted to put most of the permafrost habitats in the discontinuous zone, at risk of disappearing within the next few decades. On a decadal scale, abrupt permafrost thaw may result in larger C losses than gradual permafrost thaw, …

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Supplementary material to "Enhanced CO 2 Emissions Driven by Flooding in a Simulation of Palsa Degradation"

Mélissa Laurent, Mackenzie R. Baysinger, Jörg Schaller, Matthias Lück et autres

Effects of cations and minerals on FTIR spectra of humic acid

Nisha Bhattarai, Ruth H. Ellerbrock

Content and composition of soil organic matter (SOM) is linked to soil ecosystem services like nutrient storage. Information on the molecular composition of SOM in terms of functional groups (e.g. carboxyl; C=O, and carboxylate groups; COO-) can be obtained by spectroscopic approaches …

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Soil organic matter quality in an olive orchard differently managed for 21 years: Insights into its distribution through soil aggregates and depth

Rosangela Addesso, Fabrizio Araniti, Andrea Bloise, Alba N. Mininni et autres

Among the current global challenges, the research of new practices aimed at mitigating soil impoverishment, exacerbated by the pressing climate changes, is the most urgent. Studying soil organic matter (SOM) ecological dynamics and comparing the conventional intensive farming practices with the emerging …

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Comparing silicon mineral species of different crystallinity using Fourier transform infrared spectroscopy

Ruth H. Ellerbrock, Mathias Stein, Jörg Schaller

In soils, various solid silica (Si) species exhibit different weathering behaviors and surface reactivities, which are among other characteristics related to the crystallinity of the silicate tetrahedral network. Amorphous species exhibit faster weathering and generally possess a larger specific surface area in …

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Spectral characterization of organic matter is affected by polyvalent cations interaction

Ruth H. Ellerbrock

AbstractFunctional groups (e.g. alcohol, hydroxyl, carboxyl etc.) of soil organic matter are responsible for soil properties like cation exchange capacity or wettability. Functional groups can be characterized by spectroscopic procedures like Fourier transform infrared (FTIR) spectroscopy since the infrared light can introduce …

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Quantification of Cation-Induced Band Shift in Ftir Spectra of Organic Matter Based on Lambert-Beer's Law

Ruth H. Ellerbrock, Horst H. Gerke