Applicability of the Guggenheim-Anderson-Boer water vapour sorption model for estimation of soil specific surface area

The most popular method for the calculation of specific surface area is its determination from water vapour sorption isotherms. The study presented here has been designed for the purpose of optimisation and selection of the conditions of drying so as to allow the determination of specific surface area from plotted curves of the drying process. The results indicate that drying curves can be used as the basis for the determination of specific surface area, the values of which do not differ statistically significantly (α = 0.05) from those determined from isotherms of water vapour sorption (adsorption/desorption).

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Evaluation of the packing density of solid polymer chains—V. Determination of the specific surface area of polymers by means of nitrogen vapour sorption

Polymer Science U S S R ◽

10.1016/0032-3950(63)90251-x ◽

1963 ◽

Vol 4 (3) ◽

pp. 583

Keyword(s):

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Packing Density ◽

Polymer Chains ◽

Solid Polymer ◽

Vapour Sorption

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Analysis of the sorption properties of different soils using water vapour adsorption and potentiometric titration methods

International Agrophysics ◽

10.1515/intag-2015-0100 ◽

2016 ◽

Vol 30 (3) ◽

pp. 369-374 ◽

Cited By ~ 10

Author(s):

Kamil Skic ◽

Patrycja Boguta ◽

Zofia Sokołowska

Keyword(s):

Specific Surface ◽

Cation Exchange ◽

Surface Charge ◽

Surface Area ◽

Water Vapour ◽

Potentiometric Titration ◽

Specific Surface Area ◽

Cation Exchange Capacity ◽

Exchange Capacity ◽

Sorption Properties

Abstract Parameters of specific surface area as well as surface charge were used to determine and compare sorption properties of soils with different physicochemical characteristics. The gravimetric method was used to obtain water vapour isotherms and then specific surface areas, whereas surface charge was estimated from potentiometric titration curves. The specific surface area varied from 12.55 to 132.69 m2 g−1 for Haplic Cambisol and Mollic Gleysol soil, respectively, and generally decreased with pH (R=0.835; α = 0.05) and when bulk density (R=−0.736; α = 0.05) as well as ash content (R=−0.751; α = 0.05) increased. In the case of surface charge, the values ranged from 63.00 to 844.67 μmol g−1 Haplic Fluvisol and Mollic Gleysol, respecively. Organic matter gave significant contributions to the specific surface area and cation exchange capacity due to the large surface area and numerous surface functional groups, containing adsorption sites for water vapour molecules and for ions. The values of cation exchange capacity and specific surface area correlated linearly at the level of R=0.985; α = 0.05.

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Adsorption of water vapour and the specific surface area of arctic zone soils (Spitsbergen)

International Agrophysics ◽

10.1515/intag-2016-0076 ◽

2018 ◽

Vol 32 (1) ◽

pp. 19-27 ◽

Cited By ~ 3

Author(s):

Jolanta Cieśla ◽

Zofia Sokołowska ◽

Barbara Witkowska-Walczak ◽

Kamil Skic

Keyword(s):

Specific Surface ◽

Surface Area ◽

Water Vapour ◽

Specific Surface Area ◽

Nitrogen Adsorption ◽

Total Carbon ◽

Arctic Zone ◽

Surface Areas ◽

Arctic Soils ◽

Specific Surface Areas

AbstractWater vapour/nitrogen adsorption were investigated and calculated the specific surface areas of arctic-zone soil samples (Turbic Cryosols) originating from different micro-relief forms (mud boils, cell forms and sorted circles) and from different depths. For the characterisation of the isotherms obtained for arctic soils, the Brunauer-Emmet-Teller model was then compared with the two other models (Aranovich-Donohue and Guggenheim-Anderson-de Boer) which were developed from Brunauer-Emmet-Teller. Specific surface area was calculated using the Brunauer-Emmet-Teller model at p p0−1range of 0.05-0.35 for the water vapour desorption and nitrogen adsorption isotherms. The values of total specific surface area were the highest in Cryosols on mud boils, lower on cell forms, and the lowest on sorted circles. Such tendency was observed for the results obtained by both the water vapour and nitrogen adsorption. The differences in the values of specific surface area at two investigated layers were small. High determination coefficients were obtained for relationships between the specific surface areas and contents of clay and silt fraction in Cryosols. No statistically significant correlation between the total carbon amount and the values of specific surface area in Cryosols has been found.

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Effect of steaming on physical properties of aluminium hydroxide and aluminium oxide

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19901920 ◽

1990 ◽

Vol 55 (8) ◽

pp. 1920-1927 ◽

Cited By ~ 1

Author(s):

Ro Yong Zun ◽

Jaroslava Polednová ◽

Květa Jirátová

Keyword(s):

Physical Properties ◽

Partial Pressure ◽

Specific Surface ◽

Surface Area ◽

Water Vapour ◽

Surface Properties ◽

Specific Surface Area ◽

Aluminium Hydroxide ◽

Aluminium Oxide ◽

Total Acidity

The effect of partial pressure of water vapour (50-750kPa) in air on physical properties of calcinated aluminium hydroxide AlOOH and aluminium oxide Al2O3 was examined. For both materials it was found that increasing pressure of water vapour leads to a decrease in the specific surface area and to an increase in the diameter of their mesopores. However, changes in the surface properties have not been identical: the total acidity of Al2O3 decreased whereas the acidity of calcinated AlOOH passed through a maximum. The total basicity of Al2O3 increased while that of AlOOH decreased.

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