Coupled Effects of Ionic Strength, Particle Size, and Flow Velocity on Transport and Deposition of Suspended Particles in Saturated Porous Media

Bennacer, Lyacine; Ahfir, Nasre-Dine; Alem, Abdellah; Wang, Huaqing

doi:10.1007/s11242-017-0856-6

Cited by 42 publications

(25 citation statements)

References 56 publications

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“…For V D = 4.55 and 1.62 m/d, over 90% Fe(III) deposition occurred in that section, whereas V D = 4.55 has 75% Fe(III) deposition within that section. For suspended particles, retention rates are higher at a low flow velocity because the hydrodynamic forces exerted by the flow are insufficient to overcome attractive forces, and subsequently transport the particles [25]. The current study shows Fe(III) retention for lower V D was less than for higher V D , which is the opposite of suspended particle retention; the main reason for this is that high velocity promotes Fe(III) flocculation.…”

Section: Mass Depositionmentioning

confidence: 50%

Flow Velocity Effects on Fe(III) Clogging during Managed Aquifer Recharge Using Urban Storm Water

Zhang

et al. 2018

Water

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Storm water harvesting and storage has been employed for nearly a hundred years, and using storm water to recharge aquifers is one of the most important ways to relieve water scarcity in arid and semi-arid regions. However, it cannot be widely adopted because of clogging problems. The risk of chemical clogging is mostly associated with iron oxyhydroxide precipitation; anhydrous ferric oxide (HFO) clogging remains a problem in many wellfields. This paper investigates Fe(III) clogging levels at three flow velocities (Darcy velocities, 0.46, 1.62 and 4.55 m/d). The results indicate that clogging increases with flow velocity, and is mostly affected by the first 0-3 cm of the column. The highest water velocity caused full clogging in 35 h, whereas the lowest took 53 h to reach an stable 60% reduction in hydraulic conductivity. For the high flow velocity, over 90% of the HFO was deposited in the 0-1 cm section. In contrast, the lowest flow velocity deposited only 75% in this section. Fe(III) deposition was used as an approximation for Fe(OH) 3. High flow velocity may promote Fe(OH) 3 flocculent precipitate, thus increasing Fe(III) deposition. The main mechanism for a porous matrix interception of Fe(III) colloidal particles was surface filtration. Thus, the effects of deposition, clogging phenomena, and physicochemical mechanisms, are more significant at higher velocities.

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Section: Mass Depositionmentioning

confidence: 50%

Flow Velocity Effects on Fe(III) Clogging during Managed Aquifer Recharge Using Urban Storm Water

Zhang

et al. 2018

Water

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“…The SP suspension with different particle (C inj = 1, 2, 4 and 8 mg/ml) and Pb 2+ (C P = 0−800 μg/ml) concentrations was injected at Darcy velocities, v, of 0.087, 0.173, and 0.260 cm/s. The Reynolds numbers varied between 1.12 and 3.34, confirming that the experiments were conducted under laminar flow conditions (Alem et al, 2013;Bennacer et al, 2017). In each experiment, V inj = 30 ml of SP suspension was injected in a pulseinjection fashion over a period of t inj = 2 s. The turbidity level in the effluent was measured three times and the means were used to minimize errors.…”

Section: Operating Procedures and Measurementmentioning

confidence: 88%

“…Eq. (7) can be used to simulate the BTCs of SPs for pulse injection, where the injection duration is sufficiently short to be considered instantaneous (Bennacer et al, 2017). Eq.…”

Section: Transport Theory and Parametersmentioning

confidence: 99%

“…Contaminants in porous medium can be roughly classified into three types, including contaminants adsorbed on immobile solid particles, contaminants dissolved in water, and contaminants adsorbed on the surface of solid particles that move with water flow (Chrysikopoulos et al, 2017;Sen and Khilar, 2006). However, SPs can also be a barrier to the migration of contaminants if their presence clogs the porous medium (Bennacer et al, 2017;Li and Zhou, 2010;Natarajan and Kumar, 2011). Puls and Powell (1992) showed that the transport rate of colloidassociated arsenate (As) was more than 21-times that of dissolved As.…”

Section: Introductionmentioning

confidence: 99%

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The seepage transport of heavy metal Pb²⁺ through sand column in the presence of silicon powders

Bai

Zhai

Rao

2019

Journal of Hydrology and Hydromechanics

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The coupled transport of heavy metals with suspended particles has been a topic of growing interest. The main purpose of this study is to experimentally investigate the seepage transport of heavy metal Pb2+ in the presence of silicon powders (SPs) through a sand column under different seepage velocities (v = 0.087–0.260 cm/s), injection Pb2+ concentrations (CP = 0–800 μg/ml) and SP sizes (D50 = 2.8–25.5 μm), which were likely to be encountered in practical engineering. The sand column was installed in a cylindrical chamber of 300 mm in length and 80 mm in internal diameter. The results clearly show that the increase in acidity results in a reduction of the repulsive interactions between SPs and the matrix, and consequently a decrease in the peak values in breakthrough curves (BTCs), especially for larger-sized SPs. The peak values and recovery rate of Pb2+ are obviously increased and an earlier breakthrough can be observed, due to the higher capacity of SPs with negative charge to adsorb heavy metal pollutants such as Pb2+ with positive charge. The adsorption of Pb2+ on SPs can reduce the repulsive forces between SPs and the matrix, thus resulting in the increase of the deposition possibility of SPs and the decrease of peak value and recovery rate.

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“…The processes of precipitation and dissolution of minerals may be affected by microbiological processes, such as in the engineering practice of microbially induced calcium carbonate precipitation (Hommel et al, 2015;Martinez et al, 2014). Another process that can produce changes in porosity and the hydraulic properties is the migration of fines (solid mineral particles), which is influenced by both hydrodynamic and chemical factors (Bennacer et al, 2017;Mays and Hunt, 2007;Yu et al, 2013). Again, this process is relevant in many engineering applications, but also within the field of soil development.…”

Section: Introductionmentioning

confidence: 99%

The HPx software for multicomponent reactive transport during variably-saturated flow: Recent developments and applications

Jacques

Šimůnek

Mallants

et al. 2018

Journal of Hydrology and Hydromechanics

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HPx is a multicomponent reactive transport model which uses HYDRUS as the flow and transport solver and PHREEQC-3 as the biogeochemical solver. Some recent adaptations have significantly increased the flexibility of the software for different environmental and engineering applications. This paper gives an overview of the most significant changes of HPx, such as coupling transport properties to geochemical state variables, gas diffusion, and transport in two and three dimensions. OpenMP allows for parallel computing using shared memory. Enhancements for scripting may eventually simplify input definitions and create possibilities for defining templates for generic (sub)problems. We included a discussion of root solute uptake and colloid-affected solute transport to show that most or all of the comprehensive features of HYDRUS can be extended with geochemical information. Finally, an example is used to demonstrate how HPx, and similar reactive transport models, can be helpful in implementing different factors relevant for soil organic matter dynamics in soils. HPx offers a unique framework to couple spatial-temporal variations in water contents, temperatures, and water fluxes, with dissolved organic matter and CO 2 transport, as well as bioturbation processes.

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Coupled Effects of Ionic Strength, Particle Size, and Flow Velocity on Transport and Deposition of Suspended Particles in Saturated Porous Media

Cited by 42 publications

References 56 publications

Flow Velocity Effects on Fe(III) Clogging during Managed Aquifer Recharge Using Urban Storm Water

Flow Velocity Effects on Fe(III) Clogging during Managed Aquifer Recharge Using Urban Storm Water

The seepage transport of heavy metal Pb²⁺ through sand column in the presence of silicon powders

The HPx software for multicomponent reactive transport during variably-saturated flow: Recent developments and applications

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Coupled Effects of Ionic Strength, Particle Size, and Flow Velocity on Transport and Deposition of Suspended Particles in Saturated Porous Media

Cited by 42 publications

References 56 publications

Flow Velocity Effects on Fe(III) Clogging during Managed Aquifer Recharge Using Urban Storm Water

Flow Velocity Effects on Fe(III) Clogging during Managed Aquifer Recharge Using Urban Storm Water

The seepage transport of heavy metal Pb2+ through sand column in the presence of silicon powders

The HPx software for multicomponent reactive transport during variably-saturated flow: Recent developments and applications

Contact Info

Product

Resources

About

The seepage transport of heavy metal Pb²⁺ through sand column in the presence of silicon powders