Comparison of three methods of measuring surface area of soils

Jong, E. de

doi:10.4141/s98-069

Cited by 50 publications

(20 citation statements)

References 25 publications

(28 reference statements)

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“…The parameters necessary for the determination the surface properties and porosity of a given material are the specific surface area (SSA), the total pore volume (derived from the amount of vapour adsorbed at a relative pressure close to unity), the pore size (which can be estimated from the pore volume or BET treatment of the data) and the micropore surface area. The absorption of methylene blue dye in aqueous suspension and, more widespread, that of ethylene glycol monoethylether have been used to determine SSA for several decades [82][83][84]. Of all the many gas and vapour methods readily available for adsorptive studies, the BET method for N 2 -adsorption is nowadays universally preeminent as standard method in SSA determination.…”

Section: N 2 Adsoption-desorption Studiesmentioning

confidence: 99%

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Tonlé

Ngameni

Tchieno

et al. 2015

J Solid State Electrochem

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Amperometric sensors dedicated to the determination of pollutants and other compounds of interest face daily a great challenge: the development of sensitive, reproducible and low-cost devices allowing fast analyses. This review deals with the beneficial role and application of organoclays exploited as sensing materials in various fields of electroanalysis, for the past 15 years (period 2000-2014). After a description of different preparation methods leading to clay minerals chemically modified by organic compounds, the common methods used for their characterization are exposed; then, their application as electrode modifiers is described, covering several approaches that were developed to enhance either the sensitivity or the selectivity of the indexed organoclay-based sensors. Finally, a brief description of voltammetric methods frequently used for electroanalytical purposes is given, followed by an update of recent and salient results achieved for the detection of inorganic and organic electroactive compounds or ions.

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Section: N 2 Adsoption-desorption Studiesmentioning

confidence: 99%

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Tonlé

Ngameni

Tchieno

et al. 2015

J Solid State Electrochem

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“…The SSA depends on the abundance and type of clay minerals, the CEC and the grain size of the materials (De Kimpe et al , 1979; Tiller & Smith, 1990; Petersen et al , 1996; De Jong, 1999). The SSA values of the lower Kert marls (26.3–125.6 m 2 g –1 ) are considered low, even though they are greater than the Meknes marl values (33.3–37.9 m 2 g –1 ).…”

Section: Discussionmentioning

confidence: 99%

Characterization of Neogene marls from the Kert Basin (northeast Morocco): suitability for the ceramics industry

et al. 2019

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The Neogene marls from the lower Kert area (northeast Morocco) were characterized to evaluate their suitability for the ceramics industry. Two cross-sections involving all of the Neogene facies were studied on both banks of the Kert River. Grey and green marls occurring between sandstone and tuffs were characterized by mineralogical (X-ray diffraction) and physicochemical (grain size, Atterberg limits, X-ray fluorescence and specific surface area) analyses. The Neogene clays studied are mainly calcareous silty marls containing 13–20 wt.% calcite. They consist of quartz, calcite, feldspars, dolomite, illite, kaolinite, chlorite and 10–14 Å illite-vermiculite mixed layers. Cristobalite was detected only in the uppermost level of the green marls, and it originates from a volcanic ash of Messinian age. Trace amounts of siderite and rhodochrosite indicate reducing or locally oxidizing conditions during sedimentation or shortly thereafter. The marls have medium to high plasticity, making them optimal for extrusion. Raw Neogene marls are suitable for manufacturing structural clay products. More specific uses, such as hollow products, roofing tiles and masonry bricks, were supported by the geochemical results and grain-size distribution.

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“…The cation exchange capacity of the soils was obtained by summation of exchangeable alkaline cations and acidity according to Thomas (1982). The specific surface area (SSA) of the soils was determined according to the ethylene glycol monoethyl ether (EGME) procedure, whereas the external surface area was measured by the BET method (Gregg and Sing 1967;Carter et al 1986;de Jong 1999). 1994).…”

Section: Physical and Chemical Soil Testsmentioning

confidence: 99%