Sorption of nonpolar neutral organic compounds to humic acid-coated sands: Contributions of organic and mineral components

Joo, Jin Chul; Shackelford, Charles D.; Reardon, Kenneth F.

doi:10.1016/j.chemosphere.2007.07.052

Cited by 34 publications

(41 citation statements)

References 23 publications

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“…The model also suggests that nonpolar molecules such as phenanthrene can interact directly with the mineral surface via hydrophobic interactions. Although this is consistent with some published experimental data (Carmo et al 2000;Joo et al 2008b), several other studies have not been able to detect phenanthrene and other hydrophobic compound sorption to mineral surfaces due to competition with water (Salloum et al 2001;Feng et al 2005;Bonin and Simpson 2007a). The OM-OM interactions that occur in the zone of hydrophobic interactions are believed to result in OM layers.…”

Section: -D Nmr (Tocsy) Of Unsorbed Compounds In Solutionsupporting

confidence: 81%

“…This is complicated by the chemical heterogeneity of OM and the use of different OM and mineral samples and varying solution conditions used by various researchers. Furthermore, the bulk of the corroborating results are for studies with phenanthrene-other organic chemicals did not show the same trends (Joo et al 2008b;Ahanger et al 2008;Bonin and Simpson 2007b). Consequently, there is a need to examine the role of OM-mineral complexes with varying organic chemicals.…”

Section: Summary and Synthesis Of Future Research Directionssupporting

confidence: 48%

“…The concept of sorption sites being blocked by OM components via OM-OM interactions on mineral surfaces has been the focus of several studies (Feng et al 2006;Joo et al 2008b;Kang and Xing 2005;Van Emmerik et al 2007). Observations with soils and sediments have revealed reduced porosity and surface area due to OM-OM associations (Mikutta et al 2004;Kleber et al 2007;Wagai et al 2009) which is consistent with the zonal model discussed in Section 3.2.…”

Section: The Role Of Organic Matter-mineral Interactions In Organic Cmentioning

confidence: 99%

“…These results exemplify the continued need to examine the role of OM-mineral associations and their impact on sorptive behaviour with other, established trends such as the physiochemical properties of the organic contaminant and OM structure. For example, Joo et al (2008b) tested a sorption model that included a parameter for OM blocking using experimental data for the sorption of 1,2,4-trichlorobenzene, 1,4-dichlorobenzene, chlorobenzene, m-xylene, toluene, and benzene on sand and OM-coated sand. However, the results suggested that conventional sorption models that take into account both the mineral and OM phases were not suitable for predicting sorptive behavior.…”

Section: The Role Of Organic Matter-mineral Interactions In Organic Cmentioning

confidence: 99%

See 3 more Smart Citations

The Role of Organic Matter–Mineral Interactions in the Sorption of Organic Contaminants

Simpson

2011

Biophysico‐Chemical Processes of Anthropogenic Organic Compounds in Environmental Systems

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Section: -D Nmr (Tocsy) Of Unsorbed Compounds In Solutionsupporting

confidence: 81%

Section: Summary and Synthesis Of Future Research Directionssupporting

confidence: 48%

Section: The Role Of Organic Matter-mineral Interactions In Organic Cmentioning

confidence: 99%

Section: The Role Of Organic Matter-mineral Interactions In Organic Cmentioning

confidence: 99%

See 2 more Smart Citations

The Role of Organic Matter–Mineral Interactions in the Sorption of Organic Contaminants

Simpson

2011

Biophysico‐Chemical Processes of Anthropogenic Organic Compounds in Environmental Systems

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“…Generally, H 2 O extracts are composed of dissolved and weakly adsorbed compounds (Joo et al, 2008). The results from this study show that the K 2 SO 4 extracts contain more DOC than the H 2 O extracts.…”

Section: Discussionmentioning

confidence: 55%

Influence of extractants and filter materials in the extraction of dissolved organic matter (DOM) from subtropical agricultural soil

Zheng

Liang

2018

Emir J Food Agric

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The dissolved organic matter (DOM) plays an important role in ecological processes in agricultural ecosystems. However, composition of DOM extracted by different methods remains unclear. In this study, pyrolysis–gas-chromatography/mass spectrometry (Py-GCMS) was used to investigate the content and chemical composition of DOM extracted by aqueous K2SO4 or H2O and filter paper (FP) or membrane (FM). The results showed that dissolved organic carbon (DOC) content extracted by K2SO4 was 0.83–11.2 times higher than that extracted by H2O, while it increased by 10.1–75.0% when filtered by FP compared to that filtered by FM. Compared with the H2O extract, the K2SO4 one contained lower proportions of aromatic compounds. The relative proportions of hydrophobic compounds in the K2SO4 extract (9.7–89.7%), were higher than in H2O one (2.6–63.5%), whereas the proportions of hydrophilic compounds exhibited the opposite trend (p<0.05). The content and complexity of the DOM extracted by the FP-K2SO4 method was higher than that obtained by FM-H2O one. Taken together, the K2SO4 and H2O extractants affected both the quantity and quality of DOM, whereas the FP and FM filter materials only influenced the DOC content (p<0.05). Consequently, effect of the extraction method on DOM properties should be considered when studying DOM composition and corresponding ecological processes.

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Sorption equilibrium and kinetics for cyclohexane, toluene, and water on Athabasca oil sands solids

et al. 2016

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The sorption of solvents from the vapour phase to solid substrates is important in producing heavy oil and bitumen, particularly from the oil sands. We investigated the sorption and desorption equilibrium and kinetics of cyclohexane, toluene, and water on kaolinite, fine solids, and organic‐rich fine solids isolated from Athabasca oil sands over a wide range of solvent vapour concentrations using a gravimetric method. The isotherms for both adsorption and desorption of solvent vapour were determined, and the Brunauer‐Emmett‐Teller equation was used to fit the experimental data. The initial kinetic rate constants for the adsorption and desorption of solvent vapour were determined with the linear driving force model. The results were compared and discussed in terms of the type of solvent, the content of organic materials, and the surface area of the solid substrates. The results suggest that, in addition to the adsorption of solvent on mineral surfaces, the contribution from solvent partitioning in the organic materials and the porosity resulting from high amounts of organic materials are significant factors for solvent uptake and kinetic rate constants. In mixed solvent vapours, the competitive sorption of water and cyclohexane was observed in the solid substrates. However, the degree of competitiveness decreased with an increase in the content of organic materials in the substrates.

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Sorption of nonpolar neutral organic compounds to humic acid-coated sands: Contributions of organic and mineral components

Cited by 34 publications

References 23 publications

The Role of Organic Matter–Mineral Interactions in the Sorption of Organic Contaminants

The Role of Organic Matter–Mineral Interactions in the Sorption of Organic Contaminants

Influence of extractants and filter materials in the extraction of dissolved organic matter (DOM) from subtropical agricultural soil

Sorption equilibrium and kinetics for cyclohexane, toluene, and water on Athabasca oil sands solids

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