Sorption of polyaromatic compounds by organic matter-coated Ca2+– and Fe3+–montmorillonite

Polubesova, Tamara; Chen, Yona; Stefan, Catalin; Selle, Michael; Werner, P.; Chefetz, Benny

doi:10.1016/j.geoderma.2009.09.009

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…Currently, much research interest for the influence of DOM on PAHs adsorption by soils has been directed toward the interactions between PAHs and clay-humic complexes [11][12][13][14]. Their results suggested that the influence of DOM on phenanthrene sorption could be primarily described as the net effect of the 'cumulative sorption' and the association of phenanthrene with DOM in solution [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of dissolved organic matter from Guangzhou landfill leachate on sorption of phenanthrene by Montmorillonite

Tang

Wang

et al. 2011

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Effect of dissolved organic matter from Guangzhou landfill leachate on sorption of phenanthrene by Montmorillonite

Tang

Wang

et al. 2011

Journal of Colloid and Interface Science

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“…Therefore, metal (hydr)oxides play a dominant role in the adsorption of PAs rather than organic components (Huang et al ., ; Cecchi et al ., ). Our results show clearly that OM coatings have a distinctly different effect on the adsorption of PAs from that for non‐polar organic compounds, for which adsorption is enhanced by such coatings (Wang et al ., ; Polubesova et al ., ).…”

Section: Discussionmentioning

confidence: 97%

“…Recently, we have shown that a preceding adsorption of both PAs and AAs on soil minerals enhanced the adsorption of the other group (Gao et al ., ). In other studies, the retention of non‐polar organic compounds was greatly enhanced on minerals after coating with OM (Wang et al ., ; Polubesova et al ., ). However, whether that holds true for polar compounds such as PAs and AAs is unknown.…”

Section: Introductionmentioning

confidence: 97%

Organic matter coatings of soil minerals affect adsorptive interactions with phenolic and amino acids

Gao

Jansen

Cerli

et al. 2018

European J Soil Science

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Summary Phenolic (PAs) and amino acids (AAs) contribute potentially to the stabilization of organic matter (OM) in soil by forming mineral–organic associations (MOAs). However, little is known about how natural OM coating affects the adsorption of these compounds and their mutual interaction upon adsorption. Therefore, batch adsorption experiments were carried out to study how coatings of minerals with dissolved organic matter (DOM) obtained from forest leaf litter (L‐DOM) and from the O horizon (O‐DOM) affect the adsorption of phenolic acids (salicylic, syringic, ferulic and vanillic acid) and amino acids (lysine, glutamic acid, leucine and phenylalanine) at pH 6. Moreover, the adsorption of PAs on OM‐coated minerals was tested after preconditioning by AAs and vice versa. Adsorption of DOM depended on the mineral (goethite ≫ kaolinite > montmorillonite) and sources of DOM (O‐DOM > L‐DOM for goethite). Coatings of all minerals with both DOM sources reduced the adsorption of PAs and the acidic glutamic acid but enhanced that of the basic lysine. The adsorption of PAs decreased with increasing OM coating of the minerals. Strong bonds between AAs and OM‐coated minerals generally enhanced adsorption of PAs with preconditioning by AAs. This indirectly indicates a multilayer model of MOA. Adsorption of AAs, however, was rarely influenced by preconditioning with PAs. Competition between AAs and PAs generally suppressed the adsorption of AAs on coated minerals, whereas the PAs were hardly affected. These results emphasize that the amount and composition of OM coating must be considered when studying the adsorption of PAs and AAs in soil. Highlights Adsorption of DOM on minerals followed the order: goethite ≫ kaolinite > montmorillonite. Adsorption of O‐DOM (O horizon) on goethite was larger than that of L‐DOM (leaf litter). Coatings of DOM reduced adsorption of PAs and acidic AAs and enhanced that of basic AAs. The amount and composition of OM coating affected the adsorption of PAs and AAs.

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“…Numerous experimental and computational studies reveal the structure and stability of such complexes of smectite minerals with, for example, large alkylammonium cations (Heinz & Suter, 2004;Heinz et al, 2007;Klebow & Meleshyn, 2012;Schampera et al, 2015Schampera et al, , 2016 providing explanation of the stabilization mechanism of these organomineral complexes. Further, the negatively charged montomorillonite surface together with the compensating cations can stabilize the interactions with hydrophobic moieties possessing delocalized π-electrons, for example, polyaromatic hydrocarbons and their derivates (Cave et al, 2015;Joseph-Ezra et al, 2014;Meleshyn & Tunega, 2011;Polubesova et al, 2009).…”

Section: Interactions Of Som With Reactive Surfacesmentioning

confidence: 99%

A contribution of molecular modeling to supramolecular structures in soil organic matter^#

Gerzabek

Aquino

Balboa

et al. 2022

J. Plant Nutr. Soil Sci.

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Background Knowledge of the stabilizing mechanisms of soil organic matter (SOM) is extremely important for numerous soil functions. For this, insight into the nature of organic matter through appropriate model concepts are crucial. Aims For several years, a heated debate has emerged on the transformation and stabilization of SOM. In the present work, we try to contribute to this debate using molecular modeling and providing a comprehensive overview of the history of application of molecular modeling tools and developing structural concepts of SOM. Methods Molecular modeling methods based on quantum and/or classical mechanics were used to model SOM and related properties including interactions with reactive surfaces of soil minerals. Results Modeling of SOM aggregates revealed that hydrogen bonds and cation bridges are the main stabilizing factors in soil solution, whereas pH modifies the stability. The modeled supramolecular SOM aggregates exhibit physicochemical properties, similar to those of humic substances (HS) described in literature. The interactions of the HS models with surfaces in kaolinite nanopores led to a partial disintegration of the aggregates into individual molecules and/or smaller subaggregates. Conclusions From the molecular modeling point of view, supramolecular microaggregate models that exhibit the properties of HS are stable in the soil solution. However, their binding to reactive mineral soil constituents can be also in the form of individual molecules or subaggregates. Thus, HS microaggregate stability is relative, depending on the interacting environment. This reconciles two points of view of HS: either as small molecules and/or supramolecular structures.

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Sorption of polyaromatic compounds by organic matter-coated Ca2+– and Fe3+–montmorillonite

Cited by 7 publications

References 37 publications

Effect of dissolved organic matter from Guangzhou landfill leachate on sorption of phenanthrene by Montmorillonite

Effect of dissolved organic matter from Guangzhou landfill leachate on sorption of phenanthrene by Montmorillonite

Organic matter coatings of soil minerals affect adsorptive interactions with phenolic and amino acids

A contribution of molecular modeling to supramolecular structures in soil organic matter^#

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Sorption of polyaromatic compounds by organic matter-coated Ca2+– and Fe3+–montmorillonite

Cited by 7 publications

References 37 publications

Effect of dissolved organic matter from Guangzhou landfill leachate on sorption of phenanthrene by Montmorillonite

Effect of dissolved organic matter from Guangzhou landfill leachate on sorption of phenanthrene by Montmorillonite

Organic matter coatings of soil minerals affect adsorptive interactions with phenolic and amino acids

A contribution of molecular modeling to supramolecular structures in soil organic matter#

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Product

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A contribution of molecular modeling to supramolecular structures in soil organic matter^#