Competitive sorption between 1,3-dichlorobenzene or 2,4-dichlorobenzene or 2,4-dichlorophenol and natural aromatic acids in soil organic matter

Article Abstract:

Aromatic acids and other small natural organic molecules appear to govern the fate, transport and bioavailability of anthropogenic organic compounds in the environment by occupying and hindering the adsorption sites in soil organic matter (SOM). The selected five aromatic acids namely vanillic, ferulic p-hydroxybenzoic acid, trans-cinnamic and p-coummaric acids yielded nonlinear isotherms yielded nonlinear isotherms, revealing a distribution of site energies in SOM.

Research and Development in the Physical, Engineering, and Life Sciences, Pollution R&D NEC, Soil pollution, Pollution control research

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Response to comment on 'Adsorption of CO2 and N2 on soil organic matter: nature of porosity, surface area, and diffusion mechanisms'

Article Abstract:

Hubert Kopinke and Marjo C. Mittelmeijer-Hazeleger's basis for refuting the presence of large organic molecules in the interior of soil organic matter (SOM) was erroneous. Surface area measurements of the pore dimensions of SOMs based on pore restriction are not similar to pore dimension measurements based on pore diameter. The pore surface is also composed of subnanometer-scale pores and large pores that accomodate the sedimentation of organic molecules.

Analysis, Organic compounds, Adsorption

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Adsorption of CO2 and N2 on soil organic matter: nature of porosity, surface area, and diffusion mechanisms

Article Abstract:

The surface area, porosity and diffusion mechanisms of three different soil organic matter samples were studied. It was shown that the diffusion coefficient of CO2 was affected by the cross-linking density of the matrix. Sample hydration did not have much effect on the microporous structure. The results indicated that configurational diffusion was the primary transport mechanism of nonionic organic contaminants in the samples.

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