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.

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 BENTONITE CLAYS ON THE MINERAL COMPOSITION OF RED TABLE WINES

2021 ◽  
Author(s):  
А.Г. АБАКУМОВ ◽  
З.А. ТЕМЕРДАШЕВ ◽  
Н.М. АГЕЕВА
Keyword(s):  
Elemental Composition ◽  
Mineral Composition ◽  
Bentonite Clay ◽  
Maximum Level ◽  
Icp Ms ◽  
Before And After ◽  
Bentonite Clays ◽  
Almost All ◽  
Clay Suspensions ◽  
The Eu

Использование суспензий бентонитовых глин при обработке виноматериалов в процессе их осветления и стабилизации оказывает влияние на минеральный состав вин. Виноматериалы могут обогащаться катионами металлов, оказывающими разнонаправленное влияние на качество и розливостойкость вина. Исследованы изменения элементного состава виноматериалов в результате их обработки 32 образцами бентонитовых глин различных торговых марок. Объектами исследования были образцы виноматериалов из винограда сортов Каберне-Совиньон, Мерло и Молдова, собранного на территории Краснодарского края в 2019 г. Методами ИСП-АЭС и ИСП-МС определен элементный состав виноматериалов до обработки суспензиями бентонитовых глин и после нее. Установлено, что обработка бентонитовыми глинами привела к изменению концентраций практически всех определяемых элементов в образцах виноматериалов. Во всех образцах виноматериалов после обработки снизились концентрации B, Cu, Zn и увеличились концентрации Ag, Al, Cd, Ni, Na, Sb, Sn, Pb, Ti, Fe. As и Hg не были обнаружены ни в исходных, ни в обработанных образцах виноматериалов. Концентрации As, Cd, Hg, Pb, которые регламентируются в Российской Федерации, во всех обработанных образцах виноматериалов были существенно ниже установленного максимального уровня. Концентрации других элементов – Ag, B, Cu, Na, Zn, Ni, нормируемых в документах ЕС и МОВВ, в исследованных обработанных образцах виноматериалов оказались также значительно ниже нормативов. Таким образом, все исследованные бентонитовые глины могут быть рекомендованы к использованию при производстве вин. The use of suspensions of bentonite clays in the processing of wines in order to clarify and stabilize them has a significant effect on the mineral composition of wines. In this case, wines can be enriched with metals cations, which have a different effect on the quality and persistence of wine. Changes in the elemental composition of wine materials as a result of their treatment with 32 samples of bentonite clays of various brands were studied. The objects of the study were samples of wine materials from grapes of the varieties Cabernet Sauvignon, Merlot and Moldova, collected on the territory of the Krasnodar region in 2019. The methods of ICP-NPP and ICP-MS were used to determine the elemental composition of wine materials before and after treatment with bentonite clay suspensions. It was found that the treatment with bentonite clays led to a change in the concentrations of almost all detectable elements in the samples of wine materials. In all samples of wine materials after treatment, the concentrations of B, Cu, Zn decreased and the concentrations of Ag, Al, Cd, Ni, Na, Sb, Sn, Pb, Ti, Fe. As and Hg were not detected in either the initial or treated samples of wine materials. The concentrations of As, Cd, Hg, Pb, which are regulated in the Russian Federation, in all processed samples of wine materials were significantly lower than the established maximum level. The concentrations of other elements – Ag, B, Cu, Na, Zn, Ni, normalized in the EU and the International Organization of Vine and Wine documents, in the studied processed samples of wine materials were also significantly lower than the standards. Thus, all the studied bentonite clays can be recommended for use in the production of wines.

Influence of Cationic Polymers on the Rheological Behavior of Bentonite Clay Suspensions

2004 ◽  
Vol 264-268 ◽  
pp. 1411-1414 ◽  
Author(s):  
E. Günister ◽  
S. İşçi ◽  
N. Öztekin ◽  
N. Güngör ◽  
F.B. Erim
Keyword(s):  
Rheological Behavior ◽  
Bentonite Clay ◽  
Cationic Polymers ◽  
Clay Suspensions

Development of a Rapid Survey Method of Sampling and Analysis for Asbestos in Ambient Air

1972 ◽  
Vol 30 ◽  
pp. 630-631 ◽  
Author(s):  
R. E. Heffelfinger ◽  
C. W. Melton ◽  
D. L. Kiefer ◽  
W. M. Henry ◽  
R. J. Thompson
Keyword(s):  
Neutron Activation ◽  
Ambient Air ◽  
Survey Method ◽  
Potential Hazard ◽  
Transmission Microscopy ◽  
Comparative Analyses ◽  
Asbestos Fibers ◽  
Controlled Conditions ◽  
Unequivocal Identification ◽  
Identification And Quantification

A methodology has been developed and demonstrated which is capable of determining total amounts of asbestos fibers and fibrils in air ranging from as low as fractional nanograms per cubic meter (ng/m3) of air to several micrograms/m3. The method involves the collection of samples on an absolute filter and provides an unequivocal identification and quantification of the total asbestos contents including fibrils in the collected samples.The developed method depends on the trituration under controlled conditions to reduce the fibers to fibrils, separation of the asbestos fibrils from other collected air particulates (beneficiation), and the use of transmission microscopy for identification and quantification. Its validity has been tested by comparative analyses by neutron activation techniques. It can supply the data needed to set emissions criteria and to serve as a basis for assessing the potential hazard for asbestos pollution to the populace.

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