Modelling the Competitive Sorption Process of Multiple Solutes During their Transport in Porous Media

Avila, Manuel Alejandro Salaices; Breiter, Roman

doi:10.1007/s10666-008-9168-0

Cited by 4 publications

(1 citation statement)

References 41 publications

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“…Multiple studies have established a linear relationship between pore water velocity and ω [45,65,66]. Solute transport for PNE and CNE was simulated by Avila and Breiter [67] using f m = 0.88 and f em = 0.5. Additionally, Köhne et al [68] found that, for pesticide transport studies, fitting f m = 0.258 using an inverse DP two-site sorption model yielded the best match for breakthrough.…”

Section: Discussionmentioning

confidence: 99%

Modeling the Transport of Inorganic Arsenic Species through Field Soils: Irrigation and Soil Structure Effect

Rukh,

Akhtar,

Alshehri

et al. 2024

Water

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Dissolved arsenic (As) may appear at the tile line level through preferential flow (PF), leading to contamination of shallow water bodies. Limited work on the movement of As forms in field soils urged the need for more research. The PF of arsenate (As(V)) and arsenite (As(III)) compared to chloride (Cl) at constant flow under saturated (10 mm), slightly unsaturated (−10 mm), and unsaturated (−40 mm) pressure heads was evaluated in replicated large field columns varying in subsoil structure. A solute containing As(V), As(III), and Cl was pulsed until the Cl concentration ratio in the drainage samples reached maxima and flushed with solute-free irrigation. HYDRUS-1D software version 4.15 was utilized to fit the breakthroughs of As(V) and As(III) in the dual-porosity physical non-equilibrium model (DP-PNE). The Langmuir equation was used to fit the As(V) and As(III) sorption isotherms, and blue dye staining was used for the marking of flow paths. Dye leaching was observed up to 50 cm or deeper in the soils. Under saturated conditions (+10 mm), Kotli, Guliana, and Mansehra soils showed chemical non-equilibrium (CNE) for As(V) and As(III); however, the extent of CNE was less under unsaturated conditions (−40 mm). These results implied that these well-structured soils had enough large macropores, which cause PF, but at the same time, they were also small enough to retain water and leach solutes under unsaturated conditions (−40 mm). It is concluded that irrigation of contaminated water or dumping solid waste on well-aggregated soil may exhibit PF of dissolved As during and after rains, and additionally As(III), which is more toxic and mobile under reduced conditions, has equal or greater potential for movement.

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Section: Discussionmentioning

confidence: 99%

Modeling the Transport of Inorganic Arsenic Species through Field Soils: Irrigation and Soil Structure Effect

Rukh,

Akhtar,

Alshehri

et al. 2024

Water

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Transport of bisphenol A, bisphenol S, and three bisphenol F isomers in saturated soils

Zi,

Xu,

Zhang

et al. 2023

Environ Sci Pollut Res

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With the limitation of the use of bisphenol A (BPA), the production of its substitutes, bisphenol S (BPS) and bisphenol F (4,4'-BPF) is increasing. Understanding the fate and transport of BPA and its substitutes in porous media can help reduce their risk of contaminating soil and groundwater systems. In this study, column and batch adsorption experiments were performed with 14 C-labeled bisphenol analogs and combined with mathematical models to investigate the interaction of BPA, BPS, 4,4'-BPF, 2,2'-BPF and 2,4'-BPF with four standard soils with different soil organic matter (SOM) contents. The results show that the transport capacity of BPS and 4,4'-BPF in the saturated soils is signi cantly stronger than that of BPA. Meanwhile, the mobility of the three isomers of bisphenol F (2,2'-BPF, 2,4'-BPF and 4,4'-BPF) showed some variability in saturated soils with high SOM content. The two-site kinetic retention mode was applied to simulate and interpret experimental data, and model simulations described the interactions between the bisphenol analogs and soil very well. The tting results show that SOM provides more adsorption sites for bisphenol analogs and these adsorption sites may be irreversible adsorption sites. For the different mobility of bisphenol analogs, hydrophobicity is the main factor leading to the difference in adsorption a nity between BPA, BPS, 4,4'-BPF and soil. The main factor leading to the difference of adsorption a nity between 4,4'-BPF and its isomers (2,2'-BPF and 2,4'-BPF) and soil may be hydrogen bonding force. In addition, the results of this study show that the relatively high mobility of BPA substitutes BPS and 4,4'-BPF may pose a signi cant risk to groundwater quality, so 4,4'-BPF and BPS may not be environmentally friendly alternatives to BPA. In addition, as by-products of 4,4'-BPF production, 2,2'-BPF and 2,4'-BPF have high mobility in soil and may pose a more signi cant threat to groundwater than 4,4'-BPF. HighlightsBPS and 4,4'-BPF has higher mobility than BPA in four standard soils.2,2'-BPF, 2,4'-BPF and 4,4'-BPF have different transport capacities in standard soils.The adsorption a nity of bisphenol analogs to soil is signi cantly correlated with soil organic matter.

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Thermodynamic and kinetic modeling the interaction of goethite-ligand-metal ternary system

Zhao

2022

Environmental Pollution

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Modelling the Competitive Sorption Process of Multiple Solutes During their Transport in Porous Media

Cited by 4 publications

References 41 publications

Modeling the Transport of Inorganic Arsenic Species through Field Soils: Irrigation and Soil Structure Effect

Modeling the Transport of Inorganic Arsenic Species through Field Soils: Irrigation and Soil Structure Effect

Transport of bisphenol A, bisphenol S, and three bisphenol F isomers in saturated soils

Thermodynamic and kinetic modeling the interaction of goethite-ligand-metal ternary system

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