Influence of adsorption on phenol transport through soil–bentonite vertical barriers amended with activated carbon

Malusis, Michael A.; Maneval, James E.; Barben, Edward J.; Shackelford, Charles D.; Daniels, Emily

doi:10.1016/j.jconhyd.2010.06.001

Cited by 58 publications

(19 citation statements)

References 42 publications

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“…The Freundlich isotherm model is more appropriate in situations where the sorption sites possess a heterogeneous nature, such as soils. Some previous researches found similar results for the adsorption of organic contaminants onto soils [35][36][37].…”

Section: Adsorption Isotherm and Thermodynamicssupporting

confidence: 60%

Adsorption of Rhodamine B onto a yellow–brown soil: Kinetics, thermodynamics, and role of soil organic matter

Huang

Zhang

2015

Env Prog and Sustain Energy

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The environmental behavior of organic pollutants in soils depends on their adsorption properties onto soils. In this article, the adsorption process of Rhodamine B (RhB) from an aqueous solution onto a yellow-brown soil in Central China was studied. The isotherms and the kinetic data of the RhB adsorption onto the soil were well approached by the Freundlich isotherm model (R 2 > 0.999) and the pseudo-secondorder kinetic model (R 2 > 0.99). The adsorption process of RhB onto the soil was endothermic and increased temperature was conducive to the adsorption process. The adsorption percentage of RhB onto the soil decreased with increasing pH in the range from 2.32 to 10.96. With an increase in the ratio of soil to water, the desorption rate of RhB in the soil clearly decreased. Soil organic matter is the main contribution to RhB adsorption onto the soil. A possible complex mechanism of the adsorption was suggested on the basis of concurrent operation of electrostatic attraction, and hydrogen and chemical bonding forces.

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Section: Adsorption Isotherm and Thermodynamicssupporting

confidence: 60%

Adsorption of Rhodamine B onto a yellow–brown soil: Kinetics, thermodynamics, and role of soil organic matter

Huang

Zhang

2015

Env Prog and Sustain Energy

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“…For this reason, increasingly greater consideration is being given to contaminant attenuation (e.g., sorption capacity) as an important mechanism for improving the long-term performance of SB cutoff walls used for geoenvironmental containment (e.g., Shackelford 1999;Daniels et al 2004;Malusis et al 2009). Barriers with enhanced sorption capacity can delay solute (contaminant) breakthrough for prolonged periods (e.g., Malusis et al 2010), and a number of different sorptive amendments have been considered for earthen containment barriers, including zeolites (Evans et al 1990;Allerton et al 1996;Evans et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Consolidation and Hydraulic Conductivity of Zeolite-Amended Soil-Bentonite Backfills

Hong

Shackelford

Malusis

2012

J. Geotech. Geoenviron. Eng.

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The effect of zeolite amendment for enhanced sorption capacity on the consolidation behavior and hydraulic conductivity, k, of a representative soil-bentonite (SB) backfill for vertical cutoff walls was evaluated via laboratory testing. The consolidation behavior and k of test specimens containing fine sand, 5.8% (dry weight) sodium bentonite, and 0, 2, 5, or 10% (dry weight) of one of three types of zeolite (clinoptilolite, chabazite-lower bed, or chabazite-upper bed) were measured using fixed-ring oedometers, and k also was measured on separate specimens using a flexible-wall permeameter. The results indicated that addition of a zeolite had little impact on either the consolidation behavior or the k of the backfill, regardless of the amount or type of zeolite. For example, the compression index, C c , for the unamended backfill specimen was 0.24, whereas values of C c for the zeolite-amended specimens were in the range 0:19 ≤ C c ≤ 0:23. Similarly, the k for the unamended specimen based on flexible-wall tests was 2:4 × 10 À10 m=s, whereas values of k for zeolite-amended specimens were in the range 1:2 × 10 À10 ≤ k ≤ 3:9 × 10 À10 m=s. The results of the study suggest that enhancing the sorption capacity of typical SB backfills via zeolite amendment is not likely to have a significant effect on the consolidation behavior or k of the backfill, provided that the amount of zeolite added is small (≤ 10%).

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“…Recently, several studies addressed the potential for sorption of phenolic compounds onto bentonites or organobentonites (Banat et al, 2000;Yoo et al, 2004;Hameed, 2007;Richards and Bouazza, 2007;Malusis et al, 2010;Ahari et al, 2011). As stated above, Ahari et al (2011) obtained nonlinear adsorption curves for bentonite, so they used the Freundlich model to model bentonite.…”

Section: Absorption Onto Components Of Geosynthetic Clay Linersmentioning

confidence: 99%

A review of the performance of geosynthetics for environmental protection

Touze-Foltz¹,

Bannour

Barral

et al. 2016

Geotextiles and Geomembranes

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Influence of adsorption on phenol transport through soil–bentonite vertical barriers amended with activated carbon

Cited by 58 publications

References 42 publications

Adsorption of Rhodamine B onto a yellow–brown soil: Kinetics, thermodynamics, and role of soil organic matter

Adsorption of Rhodamine B onto a yellow–brown soil: Kinetics, thermodynamics, and role of soil organic matter

Consolidation and Hydraulic Conductivity of Zeolite-Amended Soil-Bentonite Backfills

A review of the performance of geosynthetics for environmental protection

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