Experimental determination of nonequilibrium transport parameters reflecting the competitive sorption between Cu and Pb in slag-sand column

Chung, Jaeshik; Kim, Young‐Jin; Lee, Gwanghun; Nam, Kyoungphile

doi:10.1016/j.chemosphere.2016.03.108

Cited by 20 publications

(8 citation statements)

References 37 publications

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“…S4a †). 46 Moreover, the parameter ω values of Cd 2+ with CDs were lower than those without CDs (Fig. S4b †), indicating that there was a smaller impact ratio of the Cd 2+ reaction to transport performance between the solid phase (i.e., quartz sand grains) and the aqueous phase in the presence of the nanoparticles.…”

Section: Enhanced Transport Of CD 2+ By the Cdsmentioning

confidence: 97%

“…Simulation models have been prevalently used to study the mobility behavior of heavy metal ions. 45,46 In this study, the two-site non-equilibrium transport model was utilized to describe the breakthrough curves of Cd 2+ in the sand columns using the CXTFIT code. 30,[46][47][48] This model was expressed as an equilibrium site (type 1 site) and a kinetic site (i.e., non-equilibrium site, type 2 site).…”

Section: Numerical Simulationsmentioning

confidence: 99%

“…45,46 In this study, the two-site non-equilibrium transport model was utilized to describe the breakthrough curves of Cd 2+ in the sand columns using the CXTFIT code. 30,[46][47][48] This model was expressed as an equilibrium site (type 1 site) and a kinetic site (i.e., non-equilibrium site, type 2 site). 49 Accordingly, the retardation factor (R), the fraction of the sites available for instantaneous sorption compared to the total sorption sites ( β), and the coefficient of partitioning between the equilibrium and non-equilibrium phases (ω) were obtained by direct operational model fitting of the transport data of Cd 2+ .…”

Section: Numerical Simulationsmentioning

confidence: 99%

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Insights into the effect of citric acid on the carbon dot-mediated transport of Cd²⁺ through saturated porous media

Zhang

Chen

et al. 2022

Environ. Sci.: Nano

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Section: Enhanced Transport Of CD 2+ By the Cdsmentioning

confidence: 97%

Section: Numerical Simulationsmentioning

confidence: 99%

Section: Numerical Simulationsmentioning

confidence: 99%

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Insights into the effect of citric acid on the carbon dot-mediated transport of Cd²⁺ through saturated porous media

Zhang

Chen

et al. 2022

Environ. Sci.: Nano

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“…Such irregularities might come from the competition between Pb(II) and Cd(II) and their different affinities towards quartz sand surface. The first-order hydrolysis constant of Pb(II) (pK 1 = 7.9) was higher than that of Cd(II) (pK 1 = 10.1), leading to the stronger hydrolytic ability of Pb(II) than that of Cd(II), the mobility of Cd(II) was faster than that of Pb(II) in the porous media, resulting earlier breakthrough of Pb(II) [35].…”

Section: Effect Of Flow Rate On the Co-transport Of Pb (Ii) And Cd(ii) In Saturated Quartz Sand Columnmentioning

confidence: 98%

Co-transport of Pb (II) and Cd (II) in saturated porous media: effects of colloids, flow rate and grain size

Xie

Jiang

Zhang

et al. 2018

Chemical Speciation & Bioavailability

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The transport of Pb(II) or Cd(II) in subsurface has been studied in the literature; however; their co-transport in porous media in presence of colloids has not been clearly understood. In this work, a series of column experiments were conducted to study Pb(II) and Cd(II) co-transport in saturated porous media under various experimental conditions with different combination of colloidal solution (montmorillonite colloid, manual loessial soil colloid and humic acid), flow rate (0.1, 0.5 and 1.0 ml min −1 ) and sand grain size (0.4-0.8mm and 0.8-2.0mm). The results showed that increase of flow rate and grain size promoted the mobility of Pb(II) and Cd(II), furthermore, the presences of mobile colloids also enhanced the mobility of the two heavy metals, meanwhile, Cd(II) showed higher mobility than Pb(II) in the columns. Findings from this work enhanced current understanding of the competitive transport and colloidfacilitated transport of heavy metals in saturated porous media.

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“…Thus, v, D, and λ values fitted under these experimental conditions are smaller. A similar comparative analysis can be made by using the fitting results of the ion migration experiments of Chung, Kim, Lee, and Nam (2016) and Marín-Benito et al (2013).…”

Section: Comparison and Analysis Of Fitting The Convection-dispersionmentioning

confidence: 99%

Soil infiltration and conservative solute transport characteristics with different viscosity of hydroxypropyl methyl cellulose

Ren

Shao

et al. 2020

Soil Science Soc of Amer J

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Hydroxypropyl methyl cellulose (HPMC), a potential soil improver with the ability to hold water, has practical applicability in alleviating soil and water nutrient loss. By using Cl− as tracer ions, we evaluated the effects of different HPMC viscosities on soil water infiltration characteristics and conservative solute migration characteristics. Hydroxypropyl methyl cellulose with viscosities of 2 × 104, 6 × 104, 10 × 104, and 20 × 104 mPa s−1 was selected. Experimental results revealed that the cumulative infiltration amount, wetting front migration distance, and infiltration rate decreased significantly with increased HPMC viscosity. The addition of HPMC delayed the soil solute transport process, and HPMC with a higher viscosity caused greater soil solute transport delay. Both the convection‐dispersion equation (CDE) and the two‐region model (TRM) accurately simulated solute transport, but the simulation accuracy of the TRM was higher. Results of parametric fitting based on the TRM indicated that the average pore water velocity, hydrodynamic dispersion coefficient, and dispersion degree decrease with increased HPMC viscosity. The average pore water velocity decreased by 13.6–28.2% relative to the control group (CG). Compared with the CG, the water content ratio in movable water of HPMC groups changed irregularly with an increase in viscosity. The mass exchange coefficient increased significantly compared with the CG, with an irregular trend. These data will be useful in the application and promotion of HPMC as a soil improver.

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Experimental determination of nonequilibrium transport parameters reflecting the competitive sorption between Cu and Pb in slag-sand column

Cited by 20 publications

References 37 publications

Insights into the effect of citric acid on the carbon dot-mediated transport of Cd²⁺ through saturated porous media

Insights into the effect of citric acid on the carbon dot-mediated transport of Cd²⁺ through saturated porous media

Co-transport of Pb (II) and Cd (II) in saturated porous media: effects of colloids, flow rate and grain size

Soil infiltration and conservative solute transport characteristics with different viscosity of hydroxypropyl methyl cellulose

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Experimental determination of nonequilibrium transport parameters reflecting the competitive sorption between Cu and Pb in slag-sand column

Cited by 20 publications

References 37 publications

Insights into the effect of citric acid on the carbon dot-mediated transport of Cd2+ through saturated porous media

Insights into the effect of citric acid on the carbon dot-mediated transport of Cd2+ through saturated porous media

Co-transport of Pb (II) and Cd (II) in saturated porous media: effects of colloids, flow rate and grain size

Soil infiltration and conservative solute transport characteristics with different viscosity of hydroxypropyl methyl cellulose

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Product

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Insights into the effect of citric acid on the carbon dot-mediated transport of Cd²⁺ through saturated porous media

Insights into the effect of citric acid on the carbon dot-mediated transport of Cd²⁺ through saturated porous media