Simultaneous determination of cation exchange capacity and surface area of acid activated bentonite powders by methylene blue sorption

Application of sorption tests to estimate selected properties of alluvial soils in Żuławy Elbląskie The specific surface area and hence the sorption or desorption moisture at constant water vapour pressure will increase with increasing content of humus and clay fraction in soils. Adopting such an assumption, preliminary experimental studies were performed to assess the possibility of using sorption/desorption tests to determine some features of alluvial soils from Żuławy such as cation exchange capacity CEC and the specific external surface area Se. Results of the sorption tests were compared with the analyses of the same soil properties determined with standard methods to evaluate the usefulness of the former. Preliminary studies showed a high similarity in the determination of CEC and Se with both methods. Confirmed usefulness of sorption/desorption methods for determination of the specific surface area of mineral soil particles and particularly for analyses of cation exchange capacity would bring a significant simplification of studies and a possibility of their dissemination due to the ease of such analyses. Determination of the specific surface area with the sorption and desorption method does not require sophisticated equipment and laborious and costly preliminary procedures. Dissemination of this method and recognition it as a reference one would, however, need further studies on various soil types.

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SINTESIS DAN PERBANDINGAN STRUKTUR, TEKSTUR BENTONIT ALAM DAN BENTONIT TERAKTIVASI ASAM

Photon: Jurnal Sain dan Kesehatan ◽

10.37859/jp.v7i01.572 ◽

2016 ◽

Vol 7 (01) ◽

pp. 137-140

Author(s):

Sri Hilma Siregar ◽

Wirdati Irma

Keyword(s):

Ion Exchange ◽

Specific Surface ◽

Cation Exchange ◽

Surface Area ◽

Specific Surface Area ◽

Cation Exchange Capacity ◽

Exchange Capacity ◽

Crystalline Structures ◽

Activated Bentonite ◽

Acid Cation

Bentonite is a material that has several layers, which consists of one layer of octahedral and two tetrahedral layers or commonly known as the bentonite mineral that is composed of layers of 2: 1. Bentonite nature in general is less than optimal when used as an adsorbent. This can be overcome by activating the natural bentonite either chemistry or physics. In this study, natural bentonite acid activated. Bentonite activated with HF acid with a variety of 1% -5%. Acid can damage the structure of octahedral layers in the space between the layers. Effect of activation with HF acid cause ion exchange of Al3+, Fe3+, Mg2+ with H+ ions from the acid HF so changes smectite crystalline structures. Activation of bentonite with lead acid cation exchange capacity decreased and significantly increases the specific surface area of 26.893 m2 / g (natural bentonite) to 43.167 m2 / g (activated).

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Comparison of the methylene blue absorption and the ammonium acetate saturation methods for determination of CEC values of zeolite-rich tufts

Clay Minerals ◽

10.1180/claymin.1997.032.2.13 ◽

1997 ◽

Vol 32 (2) ◽

pp. 319-322 ◽

Cited By ~ 3

Author(s):

K. P. Kitsopoulos

Keyword(s):

Methylene Blue ◽

Cation Exchange ◽

Cation Exchange Capacity ◽

Ammonium Acetate ◽

Exchange Capacity

One of the most important properties of zeolitized volcaniclastic materials is the cation exchange capacity (CEC). Numerous techniques are available for measuring CEC and the methylene blue absorption (MBA) (Nevins & Weintritt, 1967) and the ammonium acetate saturation (AMAS) (Chapman, 1965) methods are two of those commonly used. The aim of this study was to compare the results obtained by the two methods when used with zeolite-rich materials.

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Use of cesium-137 in the determination of cation exchange capacity

10.3133/b1140b ◽

1962 ◽

Keyword(s):

Cation Exchange ◽

Cation Exchange Capacity ◽

Exchange Capacity ◽

Cesium 137

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