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Hydration-facilitated sorption of specifically interacting organic compounds by model soil organic matter

Article Abstract:

The increase in sorption sites of the organic compounds, phenol and pyridine, caused by the penetration of solute molecules between polar peat contacts is responsible for the increased sorption of the organic compounds at high solute activities. The sorption of phenol and pyridine from water at low solute activities were similar to sorption from n-hexadecane. Sorption of the organic compounds at high solute activities, however, was found to be greater in water than in n-hexadecane.

Research and Development in the Physical, Engineering, and Life Sciences, Pollution R&D NEC, Phenols, Phenols (Class of compounds), Pollution control research, Pyridine

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Dual-mode sorption of low-polarity compounds in glassy poly(vinyl chloride) and soil organic matter

Article Abstract:

Soil organic matter (SOM) acts as a dual-mode sorbent, where both slid-phase dissolution and space filling of internal nanometer-size voids occur concurrently. Evidence of the non-uniform sorption potential of SOM affirms a previously suggested alternative dual-mode sorption model where the two mechanisms take place. The dual-mode sorption model was tested via comparison of expected and observed behavior according to polymer theory and modern concepts of SOM structure.

Models, Analysis, Polyvinyl chloride, Humus

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Competitive sorption between atrazine and other organic compounds in soils and model sorbents

Article Abstract:

Sorption processes allow the transfer of solutes on different kinds of surfaces. To determine whether sorption of organic compounds occurs in soil organic matter (SOM), competitive sorption between atrazine (AT) and other co-solutes in different sorbents was investigated. The results revealed that SOM is a dual-mode sorbent which exhibits nonlinearity and a significant competition arising from site-specific interactions between AT and other co-solutes.

Atrazine

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