Temperature effects on solute diffusion and adsorption in differently compacted kaolin clay

Mon, Ei Ei; Hamamoto, Shoichiro; Kawamoto, Ken; Komatsu, Toshiko; Møldrup, Per

doi:10.1007/s12665-016-5358-2

Cited by 23 publications

(12 citation statements)

References 24 publications

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“…The diffusion of water and solutes in a soil matrix increases with temperature due to higher Brownian movements and lower water viscosity (i.e. Stokes–Einstein law; González Sánchez et al., 2008; Mon et al., 2016). The greater diffusion in soil under warming may thus promote encounters between enzymes and substrates, thereby increasing instantaneous and cumulative enzyme activities.…”

Section: Effects Of Temperature On Enzyme Activity At the Enzyme Scalementioning

confidence: 99%

“…The greater diffusion in soil under warming may thus promote encounters between enzymes and substrates, thereby increasing instantaneous and cumulative enzyme activities. Moreover, the temperature sensitivities of water and solute diffusion of soil minerals (EA ranging from 15 to 25 KJ) are on the same order of magnitude as the E power of many enzymes (EA ranging from 15 to 279 KJ; Alvarez et al., 2018; González Sánchez et al., 2008; Mon et al., 2016). However, the contribution of diffusion processes to the temperature responses of soil enzyme activity and mineralization rates has been overlooked and may further depend on soil moisture availability.…”

Section: Effects Of Temperature On Enzyme Activity At the Enzyme Scalementioning

confidence: 99%

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Soil enzymes in response to climate warming: Mechanisms and feedbacks

et al. 2022

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1. Soil enzymes are central to ecosystem processes because they mediate numerous reactions that are essential in biogeochemical cycles. However, how soil enzyme activities will respond to global warming is uncertain. We reviewed the literature on mechanisms linking temperature effects on soil enzymes and microbial communities, and outlined a conceptual overview on how these changes may influence soil carbon fluxes in terrestrial ecosystems.2. At the enzyme scale, although temperature can have a positive effect on enzymatic catalytic power in the short term (i.e. via the instantaneous response of activity), this effect can be countered over time by enzyme inactivation and reduced substrate affinity. At the microbial scale, short-term warming can increase enzymatic catalytic power via accelerated synthesis and microbial turnover, but shifts in microbial community composition and growth efficiency may mediate the effect of warming in the long term.3. Although increasing enzyme activities may accelerate labile carbon decomposition over months to years, our literature review highlights that this initial stage can be followed by the following phases: (a) a reduction in soil carbon loss, due to changing carbon use efficiency among communities or substrate depletion, which together can decrease microbial biomass and enzyme activity and (b) an acceleration of soil carbon loss, due to shifts in microbial community structure and greater allocation to oxidative enzymes for recalcitrant carbon degradation.Studies that bridge scales in time and space are required to assess whether there | 1379Functional Ecology FANIN et Al.

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Section: Effects Of Temperature On Enzyme Activity At the Enzyme Scalementioning

confidence: 99%

Section: Effects Of Temperature On Enzyme Activity At the Enzyme Scalementioning

confidence: 99%

Soil enzymes in response to climate warming: Mechanisms and feedbacks

et al. 2022

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“…Here, documented examples include, among others, temperature impacts on the groundwater flow regime in the form of buoyancy effects and variations of the hydraulic conductivity value (e.g., Engström & Nordell, 2016; Harris et al., 2015; Ma & Zheng, 2010). Furthermore, chemical reaction rates (e.g., Brielmann et al., 2009; Prommer & Stuyfzand, 2005; Saripalli et al., 2001), (micro) biological activity (e.g., Derx et al., 2012; Gharabaghi et al., 2015; Stein et al., 2006) as well as intensity of diffusive processes (e.g., Mon et al., 2016) typically correlate with changes in ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Single‐Rate Dual‐Domain Mass Transfer Model: Elucidating Temperature Effects

Binder

Hahnewald

Händel

et al. 2021

Water Resources Research

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“…Along with permeability, diffusion is considered as a dominating process in the contaminant migration through landfill liners. Several researchers evaluated effects of temperature ranging from 6 o C to 50 o C on diffusion coefficient of some organic compound, heavy metals, and other cations for clayey materials such as BTEX in GCL (Rowe et al, 2005), Zn, Cd in natural clays (Do and Lee, 2006), Cr 6+ in clayey soil (Yang et al, 2011), K + in kaolin clay (Mon et al, 2016). However, there is so far few studies on diffusion of ammonium for GCL and clayey soil exposed to temperature change.…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on diffusion and non-linear adsorption of ammonium through geosynthetic clay liner and in-situ clayey soil in Hanoi, Vietnam

Hoai

Mukunoki

Trong

2021

JGS Special Publication

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High concentration of ammonium was detected in groundwater in southern Hanoi, Vietnam while municipal solid waste (MSW) landfills were known to generate large amounts of NH4 + . Thus, bottom barrier with well performance should be required in Hanoi MSW landfills to minimize NH4 + migration. Hanoi is expected to experience temperature increase, which enables to reduce hydraulic-barrier performance. Hence, study on temperature effect on NH4 + adsorption and diffusion through landfill barriers plays a key role in prevention of NH4 + contaminated aquifers. The objective is to evaluate effect of three kinds of temperature ( 20o C, 35 o C and 50 o C) on NH4 + adsorption and diffusion through GCL and in-situ clayey soil sampled in Hanoi (HN clay). The results show that GCL possesses higher non-linear partitioning coefficient (Kd*) and lower diffusion coefficient (De) than HN clay in all cases of temperature. Both GCL and HN clay experienced an increase of Kd* and De in the temperature range of 20 o C and 35 o C. When temperature rises to 50 o C, Kd* tends to decrease but De keep increasing. Hence, the study indicates a more dominant effect of diffusion coefficient than non-linear partitioning coefficient in promotion of ammonium mass transport through HN clay.

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Temperature effects on solute diffusion and adsorption in differently compacted kaolin clay

Cited by 23 publications

References 24 publications

Soil enzymes in response to climate warming: Mechanisms and feedbacks

Soil enzymes in response to climate warming: Mechanisms and feedbacks

Single‐Rate Dual‐Domain Mass Transfer Model: Elucidating Temperature Effects

Temperature effect on diffusion and non-linear adsorption of ammonium through geosynthetic clay liner and in-situ clayey soil in Hanoi, Vietnam

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