Polytherm model for methylisobutylketone adsorption onto coconut-based granular activated carbon

Paulsen, Paul David; Cannon, Fred S.

doi:10.1016/s0008-6223(98)00171-7

Cited by 15 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where S and K Fr / denote the water solubility [mg L -1 ] of the compound, and the unit-equivalent Freundlich coefficient [mg kg -1 ], which can be calculated by combining eq 2 and 3 (K Fr / ) KFr S 1/n ). Solubility-normalized sorption isotherms are commonly used in activated carbon filtration (36,(38)(39)(40). Pore-Filling.…”

Section: Theorymentioning

confidence: 99%

“…Recently Carmo et al () discussed ambiguities due to the concentration-dependent nature of the Freundlich coefficient and suggested a unit-equivalent Freundlich coefficient by normalizing C w to the water solubility of the compound (): where S and denote the water solubility [mg L -1 ] of the compound, and the unit-equivalent Freundlich coefficient [mg kg -1 ], which can be calculated by combining eq 2 and 3 ( = K Fr S 1/ n ). Solubility - normalized sorption isotherms are commonly used in activated carbon filtration ( 36 , − .…”

Section: Theorymentioning

confidence: 99%

See 1 more Smart Citation

Solubility-Normalized Combined Adsorption-Partitioning Sorption Isotherms for Organic Pollutants

Kleineidam

Schüth

Grathwohl

2002

Environ. Sci. Technol.

236

171

View full text Add to dashboard Cite

Equilibrium sorption isotherms were measured for five different low-polarity organic compounds (benzene, trichloroethene, 1,2- and 1,4-dichlorobenzene, and phenanthrene) over a wide concentration range. The investigated sorbents can be grouped into the following three classes: (1) humic soil organic matter, which shows linear sorption isotherms (solely partitioning, as observed in the peat sample); (2) carbon materials, which were thermally altered (due to their natural history or industrial production) and thus contain a high specific surface area and exhibit nonlinear isotherms, and (3) pure engineered microporous materials (e.g., zeolites and activated carbon), where adsorption is solely due to a pore-filling process. Sorption of all compounds was fitted very well by the Polanyi-Dubinin-Manes (PDM) model, which for sorbents containing humic organic matter (e.g., peat) was combined with linear partitioning. Both the partitioning and the Polanyi-Dubinin-Manes model predict unique sorption isotherms of similar compounds if the solubility-normalized aqueous concentration is used. In addition, an inverse linear relationship between the distribution coefficient (Kd) and water solubility, which was very well confirmed by the data, is obtained. This also leads to unit-equivalent Freundlich sorption isotherms and explains the often observed apparent correlation between sorption capacity at a given concentration (e.g., Freundlich coefficient) and sorption nonlinearity (Freundlich exponent).

show abstract

Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Solubility-Normalized Combined Adsorption-Partitioning Sorption Isotherms for Organic Pollutants

Kleineidam

Schüth

Grathwohl

2002

Environ. Sci. Technol.

236

171

View full text Add to dashboard Cite

show abstract

“…The adsorption isotherms can be regarded as the primary source of information on a particular adsorbent/adsorbate system whose data can be used to evaluate the suitability of a particular adsorbent, or as a starting point for modeling the adsorption process, that can include the recollection of VOCs or even their selective separation − However, the understanding of such adsorbent/adsorbate systems at a physical−chemistry level, in the majority of cases, is far from clear. This work aims to contribute to the understanding of the role of the main factors, from the adsorbent and from the adsorbate, which influence the adsorption isotherm, a question that has several practical implications.…”

Section: Introductionmentioning

confidence: 99%

“…10 A number of studies of adsorption of volatile organic compounds in activated carbons, with different insights, can be found in the literature. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] However, the understanding of such adsorbent/adsorbate systems at a physi-cal-chemistry level, in the majority of cases, is far from clear. This work aims to contribute to the understanding of the role of the main factors, from the adsorbent and from the adsorbate, which influence the adsorption isotherm, a question that has several practical implications.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Acetone, Methyl Ethyl Ketone, 1,1,1-Trichloroethane, and Trichloroethylene in Granular Activated Carbons

et al. 2003

View full text Add to dashboard Cite

The adsorption isotherms of two oxygenated and two chlorinated volatile organic compounds, namely acetone, methyl ethyl ketone, 1,1,1-trichloroethane, and trichloroethylene, were determined at 298 K, by the gravimetric technique, in four granular activated carbons. The textural properties of the adsorbents were evaluated from low-temperature nitrogen adsorpion. The Dubinin−Astakhov equation was used to fit the data, and a discussion of the results was made on the basis of relevant physical properties of the adorbate molecules.

show abstract

“…Based on a survey of common solvents, this compound was anticipated to be one of the more difficult to control during the initial stages of the treatment system, and it would, therefore, reach the GAC bed in significant quantities. This research was conducted in coordination with other members of the research team who were looking at GAC adsorption of VOCs [1][2][3] and other features of the Terr-Aqua Environmental Systems (TAES) system.…”

Section: Introductionmentioning

confidence: 99%

Effect of Advanced Oxidants Generated Via Ultraviolet Light on a Sequentially Loaded and Regenerated Granular Activated Carbon Biofilter

Dusenbury

Cannon

2004

Journal of the Air & Waste Management Association

View full text Add to dashboard Cite

The objective of this research was to investigate a sequentially loaded and regenerated granular activated carbon (GAC) biofilter system and to determine whether regenerative ozonation/advanced oxidation could improve the removal and biodegradation of a volatile organic compound from a contaminated airstream. Bench-scale reactors were constructed to operate in a manner analogous to a commercially available system manufactured by TerrAqua Environmental Systems (only with longer contact time). The GAC system consisted of two GAC biofilter beds that operated in a cyclical manner. On a given day, the first GAC bed adsorbed methyl isobutyl ketone from a simulated waste airstream, while the second bed underwent regeneration; then on the next day, the second bed was in the adsorption mode while the first was regenerated.Three bench-scale systems were used to compare the performance under three operating conditions: (1) ozone/ associated oxidant regeneration of a GAC biofilter system that was seeded with microorganisms from a field site, (2) a humid air regeneration of a seeded GAC biofilter, and (3) a humid air regeneration of an unseeded GAC biofilter. For the advanced oxidant regenerated GAC biofilter, a maximum removal efficiency of Ͼ95% was achieved with an empty bed contact time of 148 sec and an influent concentration of 125 ppm methyl isobutyl ketone, and 90 -95% was achieved at 148-sec empty bed contact time and a 1150-ppm influent.

show abstract

Polytherm model for methylisobutylketone adsorption onto coconut-based granular activated carbon

Cited by 15 publications

References 27 publications

Solubility-Normalized Combined Adsorption-Partitioning Sorption Isotherms for Organic Pollutants

Solubility-Normalized Combined Adsorption-Partitioning Sorption Isotherms for Organic Pollutants

Adsorption of Acetone, Methyl Ethyl Ketone, 1,1,1-Trichloroethane, and Trichloroethylene in Granular Activated Carbons

Effect of Advanced Oxidants Generated Via Ultraviolet Light on a Sequentially Loaded and Regenerated Granular Activated Carbon Biofilter

Contact Info

Product

Resources

About