Mineralization and temperature sensitivity of soil …
1 INTRODUCTION. The effects of increasing temperature on the stability of organic carbon (C) in soil is a primary source of uncertainty in forecasting future atmospheric CO 2 levels and C turnover. Globally, soils hold …
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Unveiling the radical to nonradical pathway transformation …
Peroxymonosulfate (PMS)-based Fenton-like processes appear as promising strategies for the soil and groundwater remediation of refractory organic pollutants, due to its high stability and …
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Straw addition and low soil moisture decreased temperature …
We assessed the impacts of 13 C-labeled maize (Zea mays) straw on SOM mineralization in two soils with contrasting soil C content (3.0 % and 6.8 %) under two …
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Temperature and soil organic matter decomposition …
high activation energies (i.e., slow rates) will experience greater proportional increases with increasing tempera-ture than will those with low activation energy (i.e., fast rates). While this …
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Energy storage and stability of soil organic matter during …
Global land-use changes are major drivers of soil organic carbon (C) dynamics, affecting the equilibrium between stored C and carbon dioxide (CO 2) emissions into the …
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Chemical and microbial activation energies of soil …
Chemical and microbial activation energies of soil organic matter decomposition Jens Leifeld & Margit von Lützow Received: 5 May 2012 /Revised: 17 May 2013 /Accepted: 24 May 2013 …
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Chemical and microbial activation energies of …
A high temperature sensitivity of microbial respiration is linked to parameters independent of chemical oxidizability, in our case, organic matter C/N ratio and soil pH.
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The effect of extreme temperatures on soil organic matter …
Results showed temperature-dependent decomposition rates from 20°C to 40°C or 50°C typical for enzymatic activity. From 40°C to 60°C, changes in the rates are less …
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Chemical and microbial activation energies of soil …
We analyzed reaction rates, thermal stability indices, and activation energies (Ea) during (i) microbial respiration (Ea (Rh)) and (ii) controlled combustion by differential scanning calorimetry...
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Temperature effects on soil urease activity
Accurate estimates of the activation energy for soil urease are needed to model how changes in soil temperature quantitatively change the hydrolysis rate of urea applied to soil. ...
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Distinct bioenergetic signatures in particulate versus …
However, based on Arrhenius and enzyme kinetics, our E a results suggest that organic matter in the heavy, mineral-associated (adsorbed) soil fraction will be relatively more …
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Thermally activated persulfate-based Advanced Oxidation …
It is interesting to note that most of the organic compounds undergo complete degradation at a high temperature of 70°C with a first-order reaction kinetics. ... in PS is …
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Hot experience for cold-adapted microorganisms: Temperature …
To test our hypothesis we collected soil from the Tibetan Plateau and incubated the samples for one month over a temperature range of 0–40 °C (with 5 °C steps) and determined …
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Soil pH and Soluble Organic Matter Shifts Exerted by …
Nutrient addition and pH compensation appear to promote microbial proliferation in unaltered and low-intensity heated treatments, but not in those heated at the highest …
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Stabilization of PFAS-contaminated soil with activated biochar
This was likely due to a strong PFAS-sorption to the high-TOC soil itself, as well as biochar pore clogging in the presence of abundant organic matter, resulting in fewer sorption …
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Influence of activation conditions on the physicochemical properties …
2.2.1 Physical activation. In the physical activation process, the biochar sample was activated at a high temperature of up to 900 °C over a 60-min interim of repose under steam …
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Effects of Straw at Different Fermentation Phases …
Returning corn straw to the field is beneficial for improving soil fertility, but the fermentation phase significantly affects the dissolved organic carbon (DOC) content. However, there is limited research on the effects of …
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Dependence of mineralization of soil organic matter on temperature …
The effects of temperature on mineralization in the two soils studied were in keeping with those reported by other authors, the temperature coefficient and activation parameters …
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Chemical and microbial activation energies of soil …
We analyzed reaction rates, thermal stability indices, and activation energies (Ea) during (i) microbial respiration (EaRh) and (ii) controlled combustion by differential scanning calorimetry …
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Temperature sensitivity of soil enzyme kinetics under N and …
The temperature sensitivity of Vmax is negatively related to the activation energy based on the Arrhenius equation; a highly efficient soil enzyme system depends on lower …
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Chemical and microbial activation energies of soil organic …
where R is the gas constant, T is the absolute temperature, k is the respiration rate, and A is the frequency or pre-exponential factor. The slope of ln k vs. T −1 equals − Ea / R.. …
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Temperature and pH mediate stoichiometric constraints of …
In this paper, we illuminate the principle that fundamental, biochemical limitations on SOM release of C, N, and P during decay, and differential exoenzymes' responses to the environment, can …
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Drying-rewetting cycles decrease temperature sensitivity of soil …
Temperature sensitivity (Q 10) of SOC decomposition indicates the response to a temperature increase of 10 °C (Rey et al., 2005).It is a critical parameter in soil carbon (C) and …
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Temperature sensitivity (Q10) of stable, primed and easily …
Soil organic matter (SOM) is a major source of ... organic matter than that of labile substrates (Dai et al., 2017). The activation energy theory regarding the temperature …
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Activating Biochar: Unlocking Potential for Long Term Soil …
The optimal temperature for the composting process should be around 70F. The activation period typically lasts 3-4 months before the biochar is ready to be used as a soil …
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The effect of extreme temperatures on soil organic matter …
The effect of temperature on soil bio decomposition impacts on global warming too. The rate at which soil organic matter, SOM, is decomposed is temperature dependent and …
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Environmental constraints' sensitivity of soil organic …
Intrinsic temperature sensitivity of soil organic carbon (SOC) pools is the inherent response of their decomposition rate to temperature. ... (1), it is clearly implied that recalcitrant …
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Thermal activation of persulfates for organic wastewater …
A relatively low temperature is satisfactory for PDS activation, while an extremely high temperature is required to activate PMS without a catalyst in solution. Both 1 O 2 and …
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Resistant soil carbon is more vulnerable to priming
Another potential explanation is the high SOM decomposition level in the control treatment at high temperature. ... relatively resistant soil C pools may be more sensitive to …
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Changes to soil organic matter decomposition rate and its temperature …
Forest swamps store a large amount of organic carbon (C) under anaerobic conditions. It is estimated that global wetlands (about 6% of land surface area) store about 541 …
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