Static filtration of purified sodium bentonite clay suspensions. Effect of clay content

2001 ◽  
Vol 19 (1-6) ◽  
pp. 103-120 ◽  
Author(s):  
M Benna ◽  
N Kbir-Ariguib ◽  
C Clinard ◽  
F Bergaya
Keyword(s):  
Bentonite Clay ◽  
Clay Content ◽  
Sodium Bentonite ◽  
Clay Suspensions

Evaluation of Filtration Properties of Clay Suspensions under Different Thermic Conditions

2016 ◽  
Vol 881 ◽  
pp. 206-211
Author(s):  
R.C.A.M. Nascimento ◽  
A.C.A. Costa ◽  
L.A. Fernandes ◽  
Luciana Viana Amorim
Keyword(s):  
High Temperature ◽  
Clay Mineral ◽  
Bentonite Clay ◽  
The Other ◽  
Sodium Bentonite ◽  
Experimental Planning ◽  
Different Temperatures ◽  
Filtration Properties ◽  
Clay Suspensions ◽  
Hydration Capacity

In clay suspensions designed for drilling, the sodic bentonite clay is commonly chosen for its better hydration capacity compared to the other kinds. The sodium bentonite clay is essentially composed by montmorilonite, a clay mineral that belongs to the group of smectites. This work aims to evaluate the behavior of clay suspensions under different thermic conditions. For that, were studied suspensions prepared with sodium bentonite clay, in concentrations varying between 2.5% and 6.4%, under different temperatures and also types of aging. The suspensions were tested based on a matrix of experimental planning. The filtration properties were determined by the filtrate volume, the relation of filtrate volume with time of filtration, the mudcake thickness and the permeability of the mudcake. The results exhibited that the high temperature promotes a gelification state of the suspensions, being therefore responsible for the high values of the filtration properties.

Influence of Compaction Energy and Bentonite Clay Content in the Soil Hydraulic Conductivity

2016 ◽  
Vol 851 ◽  
pp. 858-863
Author(s):  
Osvaldo de Freitas Neto ◽  
Olavo Francisco dos Santos Jr. ◽  
Fagner Alexandre Nunes de França ◽  
Ricardo Nascimento Flores Severo
Keyword(s):  
Soil Sample ◽  
Laboratory Tests ◽  
Particle Density ◽  
Bentonite Clay ◽  
Clay Content ◽  
Capital City ◽  
Silty Sand ◽  
Laboratory Test Results ◽  
Compaction Energy ◽  
Field Works

This paper intends to evaluate changes in permeability of a soil sample from Formação Barreiras, in Natal, the capital city of Rio Grande do Norte State, related to the degree of compaction and the adding of clay to the soil sample. In field works, samples were collected and permeability and density tests were performed. In laboratory, grain size distribution, Attemberg limits and particle density tests were conducted. Afterwards, compaction and permeability tests fulfilled the set of laboratory tests, with changes in compactive energy and sample clay content. The results from field and laboratory tests were compared and the relationship between compaction energy and sample clay content were portrayed. The soil was classified as silty sand. Field and laboratory test results were quite similar. As expected, the tests indicated that permeability is inversely proportional to both compaction energy and sample clay content in the soil tested.

Characterization of acid-activated sodium bentonite clay: A potential catalyst for recycling plastic wastes

2020 ◽  
Author(s):  
Awinash Kumar ◽  
Pradip Lingfa ◽  
Nabam Hina Papu ◽  
Moiching Sajit Ahamed
Keyword(s):  
Bentonite Clay ◽  
Sodium Bentonite ◽  
Plastic Wastes

Cationic xylan–METAC copolymer as a flocculant for clay suspensions

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 40258-40269 ◽  
Author(s):  
Shoujuan Wang ◽  
Mohan K. R. Konduri ◽  
Qingxi Hou ◽  
Pedram Fatehi
Keyword(s):  
Bentonite Clay ◽  
Controlled Conditions ◽  
Cationic Xylan ◽  
Clay Suspensions

The work presented herein focused on the flocculation of kaolin and bentonite clay suspensions using cationic copolymerized xylan under controlled conditions.

Cold Stage Scanning Electron Microscopy of Bentonite Suspensions

1980 ◽  
Vol 38 ◽  
pp. 206-207
Author(s):  
S. A. Jenekhe ◽  
H. T. Davis ◽  
L. E. Scriven
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Structural Changes ◽  
Bentonite Clay ◽  
Mineral Particles ◽  
Cold Stage ◽  
Clay Suspensions ◽  
Stage Scanning ◽  
Electrically Charged ◽  
Scanning Electron

Aqueous suspensions of clay mineral particles evidently form gels owing to interactions between the electrically charged particles. It is generally accepted that physical properties of a suspension, especially rheological properties, reflect its microstructure and that deformation brings about structural changes (1) We have applied fast-freeze cold-stage scanning electron microscopy to visualize the microstructures of bentonite clay suspensions of known shear history.

ALTERNATIVE SULPHUR FERTILISERS IN NEW ZEALAND

1986 ◽  
pp. 233-242
Author(s):  
Cc Boswell ◽  
B. Swanney
Keyword(s):  
New Zealand ◽  
Bentonite Clay ◽  
Commercial Production ◽  
Particle Sizes ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Sodium Bentonite ◽  
Suitable Material ◽  
Oxidation Rates ◽  
S Oxidation

Interest in high analysis sulphur (S) fertilisers is centred on elemental S which is generally mixed with other materials for safety reasons and to improve effectiveness. Central to the effectiveness of S fertilisers is the rate of oxidation to sulphate-S (SO4S)) for plant uptake. Oxidation rates increase as particle fineness increases. The distribution of S particle sizes in mixtures therefore affects the effectiveness of the fertiliser in any environment. Rates of oxidation vary between environments and thus different S particle size distributions suit different environments. Currently the choice of alternative commercial available S fertilisers is restricted to screened 'agricultural's" and mixtures of S" with superphosphate. Of these, molten mixed S superphosphate is the most suitable material for most environments but especially where S oxidation is slow. Commercial production of alternative S" fertiliser mixtures in New Zealand is imminent. Mixtures of S and sodium bentonite offer the possibility of preparing fertilisers to suit different environments. Granulated ground S" mixed with bentonite clay can be expected to release SO4-S more slowly but this has advantages where leaching of sulphate is likely. Production of SO4-S from two improved Canadian S/bentonite materials is expected to be similar to or slower than that from granulated ground S. Two other imported products, S impregnated urea (20% S, 36%N) and 'Thiovit' (85%S) contain finely divided and ultra finely divided S" respectively. They are raptdly and very rapidly oxidised to sulphate and may have specialised uses in cropping and horticultural enterprises. Keywords: Sulphur fertilisers, elemental sulphur, sulphur/sodium bentonite, plant sulphate, oxidation rates

scholarly journals The Effect of Bentonite Clay on Green Compression Strength for Tailing Sands from Old Tin Mines in Perak State, Malaysia for Making Green Sand Casting Mould

2011 ◽  
Vol 471-472 ◽  
pp. 769-774 ◽  
Author(s):  
A. Abdullah ◽  
Shamsuddin Sulaiman ◽  
B.T. Hang Tuah Baharudin ◽  
Mohd Khairol A. Arifin ◽  
T.R. Vijayaram
Keyword(s):  
Compression Strength ◽  
Standard Procedure ◽  
Bentonite Clay ◽  
Clay Content ◽  
Sand Casting ◽  
Green Sand ◽  
Foundry Sand ◽  
Casting Quality ◽  
Study Test ◽  
Operating Instructions

Clay has an important role in making green sand casting mould beside water. Clay acts as binders, holding the sand grains together. Water is needed to activate the clay bond. Without the addition of water on clay, no strength would be achieved on sand mould, as the sand and clay would be just two dry materials. Bentonite clay was used in this study. Adequate clay content with suitable moisture in moulding sand is important for optimum strength and casting quality. Too little or too much clay will not give proper strength. Green compression strength is one of the mechanical properties to be considered for making green sand casting mould. The green compression strength of foundry sand is the maximum compressive strength that a mixture is capable of sustaining when prepared, rammed and tested according to standard procedure. For this study, test is conducted according to Foundry Sand Testing Equipment Operating Instructions from Ridsdale and Dietert. Result from this study indicates that tailing sand has potential for making green sand casting mould in term of green compression strength. Other factors that must be considered are permeability and shatter index.

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