Sorption on nonionic surfactants on sediment materials

Article Abstract:

The sorption behavior of alcohol ethoxylates within a sediment and water environment appeared to be most affected by the concentration of Oxyethylene groups. Little effect on sorption was observed due to Ca2+ concentration, concentration of suspended solids or sediment composition. A small effect on sorption behavior was caused by the ionic strength and pH of the solution. The sorption mechanism appears to be based on the hydrogen bond dynamics involving the oxethylene groups, resulting in adsorption.

Research and Development in the Physical, Engineering, and Life Sciences, Pollution R&D NEC, Pollution control research, Polyethers, Glycol ethers

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Determination of Henry's constants of organic compounds of low volatility: methylanilines in methanol-water

Article Abstract:

The determination of the Henry's constants of low volatility organic compounds by a flow-through gas-liquid equilibration method is discussed. Four hydrophobic ionogenic organic compounds were analyzed as a function of composition of the methanol-water mixed solvent. The suitability of the method for determining transport and fate of hydrophobic ionogenic organic compounds with relatively high solubilities and relatively low Henry's constants was demonstrated.

Methods, Analysis, Estimation theory, Organic compounds

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Sorption of phenanthrene from water onto alumina coated with dianionic surfactants

Article Abstract:

The adsorption of phenanthrene from water to dianionic DOWFAX surfactants was investigated to determine whether sorption of nonionic organic compounds are affected by their partitioning phases. The results revealed that partitioning of phenanthrene between water and surfactant monolayers and bilayers is more efficient than between the corresponding surfactants phases. They provide evidence that DOWFAX surfactants are efficient sorbents of phenanthrene.

Sorbents

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