Large time behaviour of oscillatory nonlinear solute transport in porous media

Duijn, C.J. van; Zee, S.E.A.T.M. van der

doi:10.1016/j.ces.2018.02.045

Cited by 7 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contrary to the scenario considered by Beltman et al (2008), wastewater irrigation is characterized by multiple contaminant input pulses and unsteady flow conditions, and it is thus uncertain if these conclusions are relevant for the sustainability assessment of wastewater irrigation. Additionally, adsorption is often assumed to be linear with regard to the concentration in solution, whereas in general, it is a nonlinear process and this can induce significant differences with respect to transport (Cirkel, van der Zee, & Meeussen, 2015;van Duijn & van der Zee, 2018).…”

mentioning

confidence: 99%

Role of degradation concepts for adsorbing contaminants in context of wastewater irrigation

Cornelissen

Zee

Leijnse

2020

Vadose Zone Journal

View full text Add to dashboard Cite

Marginal water, like treated effluent or other types of wastewater, induces contaminant accumulation in different environmental compartments such as soil and groundwater. With a root zone model and daily rainfall data as input, accumulation in the case of two different degradation concepts was modeled: (I) the solute degrades only in the solution phase, and (II) the solute degrades in both the solution and the adsorption phase. For linear adsorption, both degradation concepts not only yield similar results, but adsorption does not affect the longterm concentration. This can be readily explained with the governing equations. For nonlinear adsorption, the degradation concept does affect the concentration and fluxes. When the first concept is valid, the long-term concentration is not affected by adsorption, whereas the short-term and fluctuations are. For the second degradation concept, the long-term average concentration and fluxes are also affected by adsorption. A correction factor was derived to correct the analytical solution of the time-dependent concentration of nonlinearly adsorbing solutes. For all scenarios, reasonable estimates of the long-term concentration could be obtained with analytical models for most parameter combinations, which can be used to identify contaminant species that should be prioritized for further research. 1 INTRODUCTION Wastewater irrigation is practiced to comply with increasing freshwater scarcity due to the growing world population and climate change (UNDP, 2006). Although wastewater irrigation is currently more widespread in arid and semiarid regions (Hamilton et al., 2005; Lawhon & Schwartz, 2006; Shetty, 2004), it has recently also received increasing attention in temperate climates to decrease the pressure on existing freshwater sources (Bixio et al., 2006).

show abstract

mentioning

confidence: 99%

Role of degradation concepts for adsorbing contaminants in context of wastewater irrigation

Cornelissen

Zee

Leijnse

2020

Vadose Zone Journal

View full text Add to dashboard Cite

show abstract

“…However, adsorption isotherms are often nonlinear in reality. The specific effects that occur under nonlinear adsorption may strongly affect the transport and fate of contaminants in the subsurface (Cirkel et al, 2015;van Duijn and van der Zee, 2018).…”

Section: Adsorption and Degradation Of Contaminantsmentioning

confidence: 99%

“…Contrary to the scenario considered by Beltman et al (2008), wastewater irrigation is characterized by multiple contaminant input pulses and unsteady flow conditions, and it is thus uncertain if these conclusions are relevant for the sustainability assessment of wastewater irrigation. Additionally, adsorption is often assumed to be linear with regard to the concentration in solution, while in general it is a nonlinear process and this can induce significant differences with respect to transport (Cirkel et al, 2015;van Duijn and van der Zee, 2018).…”

Section: Introductionmentioning

confidence: 99%

Wastewater re-use in agriculture: modelling contaminant transport and impact on soil structure

Cornelissen¹

View full text Add to dashboard Cite

Marginal water, like treated effluent or other types of wastewater, induce contaminant accumulation in different environmental compartments such as soil and groundwater. With a root zone model and daily rainfall data as input, accumulation in case of two different degradation concepts was modelled: (i) the solute degrades only in the solution phase, and (ii) the solute degrades in both the solution and the adsorption phase. For linear adsorption, both degradation concepts not only yield similar results but also adsorption does not affect the long-term concentration. This can be readily explained with the governing equations. For nonlinear adsorption, the degradation concept does affect the concentration and fluxes. When the first concept is valid, the long-term concentration is not affected by adsorption, while the short-term and fluctuations are. For the second degradation concept, the long-term average concentration and fluxes are also affected by adsorption. A correction factor was derived to correct the analytical solution of the time-dependent concentration of nonlinearly adsorbing solutes. For all scenarios, reasonable estimates of the long-term concentration could be obtained with analytical models for most parameter combinations, which can be used to identify contaminant species that should be prioritized for further research.

show abstract

“…A chemical or thermal gradient, which undergoes transport due to advection and hydrodynamic dispersion, is responsible for the difference in water quality across the interface. In light of the wide variety of applications, especially regarding water, environmental, and energy sustainability, fundamental research into the general behavior of solute and heat transport under oscillatory conditions has recently received a significant amount of engagement (e.g Laemmel et al, 2019;Stauffer et al, 2019;van Duijn & van der Zee., 2018;. Dey & Sekhar., 2016;Pauw et al, 2016;Sanz-Prat et al, 2016;Cirkel et al, 2015; Eeman et al, 2015;…”

mentioning

confidence: 99%

Managed aquifer recharge with marginal water for irrigation and contaminant attenuation

Tang¹

View full text Add to dashboard Cite

Managed aquifer recharge with marginal water allows for contaminants of emerging concern (CECs) to be attenuated in-situ, and for water to be more efficiently used. In phreatic aquifers underlying agricultural fields, this also increases water availability for crops. Existing drainage systems may be adapted for both injection (subirrigation) and extraction (drainage). We address subirrigation with treated domestic wastewater by considering numerical simulations and an experimental field site implemented as a proofof-concept. The transport, adsorption, and biodegradation of tracers, and relatively mobile and persistent CECs (using carbamazepine as an example), are analyzed. For this scenario, almost all non-biodegraded solutes irrigated into the soil are advected laterally towards surface water channels by regional groundwater flow. During the crop season, tracers may rise to the root zone, but only directly above irrigation drains. Accordingly, although up to 10% of tracers irrigated over four years are passively taken up by crops, this is concentrated in the plants situated directly above irrigation drains. No significant spreading of carbamazepine to the root zone occurs, and <1% of the total irrigated amount is taken up by crops after four years. Due to the annual precipitation surplus, solutes that are not very mobile are unlikely to enter the root zone even after decades of irrigation, because the length of the short-term precipitation shortage (crop season) is insufficient for them to rise to the root zone. Furthermore, carbamazepine biodegrades almost completely before being advected any significant distance from the drains. As carbamazepine is a relatively mobile and persistent CEC, the risks of crop, soil and surface water contamination by most other CECs is even smaller. The fraction of the irrigated CEC mass that seeps into surface water channels from the phreatic aquifer decreases exponentially with the distance between the agricultural plot and the channel, and increases exponentially with the agricultural plot width. Thus, the studied subsurface wastewater irrigation system reduces the environmental impacts of marginal water discharge and agricultural water use, with minimal risk of crop and environmental contamination.

show abstract

Large time behaviour of oscillatory nonlinear solute transport in porous media

Cited by 7 publications

References 27 publications

Role of degradation concepts for adsorbing contaminants in context of wastewater irrigation

Role of degradation concepts for adsorbing contaminants in context of wastewater irrigation

Wastewater re-use in agriculture: modelling contaminant transport and impact on soil structure

Managed aquifer recharge with marginal water for irrigation and contaminant attenuation

Contact Info

Product

Resources

About