Sur la Dépendance de L'isotherme D'adsorption de la quantité d'adsorbant

Burgers, W. G.

doi:10.1002/recl.19440630303

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…A 1944 publication by W. G. Burgers [4] afforded the opportunity to test the applicability of eq (1) and/or eq (6) to the case where the initial concentration differed from batch to batch.…”

Section: Application Of Batch Adsorption Theory For Different Valumentioning

confidence: 99%

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Adsorption, desorption, resorption

Loebenstein¹

1963

J. RES. NATL. BUR. STAN. SECT. A.

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The complete characterization of batch adsorption from solution, desorption, and related phenomena have been interpreted in the light of a general equation. The forward and reverse adsorption-rate constants and the adsorptive capacity comprise the only parameters. Where adsorption alone is of importance and the desorption-rate constant can be neglected, a simplified form of the theory results in a special equation which may suffice for most adsorption purposes. In either case, the characteristic parameters are determinable from the data and serve as criteria for comparing similar systems. The theory has been confirmed by the data of various investigators taken from the literature. The parameters derived from column adsorption are in agreement with the corresponding batch-derived parameters. The limitations as well as the capabilities of the theory are presented; but even where deviations from the assumed model exist, the results are useful.

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Section: Application Of Batch Adsorption Theory For Different Valumentioning

confidence: 99%

“…It is instructive to select the final illustration from an experiment cited by Burgers [4] in referring to a paper by Freundlich [6] published nearly 60 years ago. Freundlich compared two batch adsorption runs using 1g of blood charcoal as the adsorbent in each run and acetic acid as the adsorbate.…”

Section: Adsorption—desorption—resorptionmentioning

confidence: 99%

Adsorption, desorption, resorption

Loebenstein¹

1963

J. RES. NATL. BUR. STAN. SECT. A.

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Auslösungskrystalle und Zwillingsbildung in Rekrystallisiertem Aluminium

Burgers

May

1945

Recl. Trav. Chim. Pays‐Bas

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Aluminium plates with large crystals, obtained by recrystallization of finely grained material, show many "pointed" crystals: cf. fig. 1. 9 and 11. Such crystals have grown as a result of "stimulation" by another crystal, in this way that their growth did not start until another crystal, the growth of which had started previously, reached the nucleus of the "stimulatzd" crystal. In order to obtain a measurable size, the velocity of growth of the stimulated crystal must, at least a t the beginning, be larger than that of the stimulating crystal.X-ray investigation has shown that the relation between the orientations of both crystals is practically always that of a spinel-twin: cf. fig. 5. Twinning is thus rather common in recrystallized aluminium. It has only not be generally recognized on account of the absence of straight twin boundaries, a consequence of the difference in velocity of growth of stimulating and stimulated crystal.T h e question is discussed as to the physical aspect of "stimulation" in the above given sense. For the moment the following has been suggested: Stimulating and stimulated crystal have an octahedral plane (111) and in this plane the direction [ 1101 in common. This plane and direction are those used in the glide-process of the cubic face-centred metals. Suppose gliding along a definite combination has taken place in a lattice-region: this means, according to the now prevalent conception, that "dislocations" have mo\red along this plane over certain distances and are then arrested, together with their fields of stress, a t definite structural "irregularities" (flaws etc.). Suppose again there is a growing crystal, which by chance has an octahedral plane in twin Orientation with regard to the active glide-plane of the lattice-region considered above. Then as soon as contact is established between the growing crystal and the deformed Iattice-region, something like a "discharge" of the arrested dislocations along the octahedral plane of the growing crystal might perhaps be conceived. As a consequence the deformed region may attain the capacity to grow. W h y , however, its velocity of growth is larger than that of the stimulating crystal, is not yet clear. Perhaps the lattice of the stimulated crystal is more "perfect" than that of the stimulating crystal.The possibility must be kept in mind that the process described by us as a stimulation does not exist in reality and is actually caused by an "error in the deposition of a layer of atoms along the octahedral plane, giving rise to the occurrence of the twin orientation. In that case it seems still more difficult to imagine in which way the experimentally observed difference in velocity of growth of both twin-parts comes into existence. Perhaps this second mechanism is the normal one for such metals as nickel, copper, nickeliron, which twin frequently, producing twin lamellae with straight boundaries. § 1. In zwei friiheren Arbeiten ( S a n d e e l ) , B u r g e r s * ) ) wurde gezeigt, dass in Aluminiumplatten mit grossen Krystallen, die du...

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Sur la Dépendance de L'isotherme D'adsorption de la Quantité D'adsorbant: (Remarque à propos de la publication de W. G. Burgers)

Duuren

1945

Recl. Trav. Chim. Pays‐Bas

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Remarque i propos de la publication de W. G. B u r g e r s) J' AR A . 1. V A N DUIIREN. Quelques chercheurs ont signale que la position de I'isothcrmc d'cldsorptiou depetid dc la quantite d'adsorbant pour un volume determine. Cependant. en faisant des experiences sur l'adsorption de I'acidr acetique par du charban purific ( Norite) en solution aqueuse, B u r g e r s I ) a trouvi. quc les isothermes d'adsorption. 111 = acide acetique; 0.250 g 1v = ,, ,. 0.400 g ,, ,, 100 cm3 ,, ,, \ ,, Lors de I'adsorption dc l'acide acftique, on a observe. en outre, l'apparition d'un maximum de X pour des valeurs decroissantes de m. m c, 11 constant ') W. G. B u r g e r s. Rec. trav. chiin. 63, 46 (1944). 2 , ..Tcrrana", uric. terre decolorante comrncrcialc activfe.:<) A. J. v a n D ti u r e n. ,,Quelqucs recherches sur !es terres dCcolorantes. en particulier sur Ics terres dfcolorantes des Indes Neerlandaises". These Amsterdam, page 45 (1942).

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Sur la Dépendance de L'isotherme D'adsorption de la quantité d'adsorbant

Cited by 4 publications

References 10 publications

Adsorption, desorption, resorption

Adsorption, desorption, resorption

Auslösungskrystalle und Zwillingsbildung in Rekrystallisiertem Aluminium

Sur la Dépendance de L'isotherme D'adsorption de la Quantité D'adsorbant: (Remarque à propos de la publication de W. G. Burgers)

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