A general treatment and classification of the solute adsorption isotherm. I. Theoretical

Giles, C. H.; Smith, David W.; Huitson, Alan

doi:10.1016/0021-9797(74)90252-5

Cited by 1,733 publications

(1,035 citation statements)

References 23 publications

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“…Figure 2 shows the metalaxyl adsorption curves at equilibrium in the two studied samples. The metalaxyl adsorption curves were linear for both soils, i.e., Giles type C curves (Giles et al 1974). This type of curve implies a constant partition between the amounts of metalaxyl adsorbed in the soil and the metalaxyl concentration in solution, i.e., a constant coefficient of distribution (K D ).…”

Section: Resultsmentioning

confidence: 94%

Metalaxyl mobility in acid soils: evaluation using different methods

Fernández‐Calviño

Bermúdez-Couso

Nóvoa-Muñoz

et al. 2014

Int. J. Environ. Sci. Technol.

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In the present work, different methods were tested to evaluate the adsorption and desorption of metalaxyl in two acid soils with different organic carbon and clay contents. The three methods (batch, stirred flow chamber and column) that were examined produced similar findings when the two soils were compared: (a) the metalaxyl adsorption capacity was higher in the soil with higher organic matter and clay content, and (b) the soil with the lower organic matter and clay contents provided higher adsorption rate constants. In the two soils tested, the metalaxyl adsorbed in the soil was highly reversible. When only one soil was considered, the different methods yielded different results. The metalaxyl adsorption and its rate were higher with the stirred flow chamber than in the column experiments, and in the column experiments, the total metalaxyl adsorption and the rate of adsorption were higher than in the batch experiments. The percentages of metalaxyl desorbed from the soil were similar in the stirred flow chamber and column experiments, but in the batch experiments, the percentages were significantly lower. In the stirred flow chamber experiments, the desorption processes were faster than the adsorption processes, while in the column experiments, the adsorption and desorption processes exhibited similar rates.

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Section: Resultsmentioning

confidence: 94%

Metalaxyl mobility in acid soils: evaluation using different methods

Fernández‐Calviño

Bermúdez-Couso

Nóvoa-Muñoz

et al. 2014

Int. J. Environ. Sci. Technol.

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“…5. As can be seen, all isotherms belong to class L according to Giles classification [35]. According to Giles the L type of isotherm is connected with flat position of the adsorbate molecule toward the adsorbent surface.…”

Section: Removal Of Phenol and Congo Redmentioning

confidence: 99%

Tailoring mesoporosity of poly(furfuryl alcohol)-based activated carbons and their ability to adsorb organic compounds from water

Lorenc-Grabowska

Rutkowski

2018

J Mater Cycles Waste Manag

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In this work it was shown that polymers can be recycled into a promising adsorbent for organic dyes and phenols waste removal. For this, a series of activated carbons (ACs) were produced from mixture of ferrocene or titanium acetylacetonate with poly(furfuryl alcohol) (PFA) by steam activation. The introduction of ferrocene as Fe precursor was found to be an efficient catalyst in mesoporosity development during carbonization and subsequent steam activation at 850 °C, whereas the polymer based only and titanium-doped ACs are typically microporous. The porous structure parameters were determined from nitrogen adsorption isotherms measured at 77 K. Scanning electron microscopy was applied to monitor the metal distribution of metal-loaded char and the surface morphology of activated carbons. The adsorption capacity was found to be dependent mainly on pore size distribution. In the case of phenol adsorption, the adsorption was defined by volume of pore with size 0.8-1.4 nm; whereas, for Congo red best fit was observed for volume of pore with size 2-5 nm.

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“…There is no doubt about the usefulness of K ci ; however it has no thermodynamic signification. Going without the solvent, the thermodynamic equilibrium constant of process [1] is given by:…”

Section: Theorymentioning

confidence: 99%