Bentonite clay minerals mapping using ASTER and field mineralogical data: A case study from the eastern Rif belt, Morocco

2021 ◽  
pp. 100640
Author(s):  
Othmane Lamrani ◽  
Ayoub Aabi ◽  
Abdellah Boushaba ◽  
Mohamed Tobbal Seghir ◽  
Zakaria Adiri ◽  
...  
Keyword(s):  
Clay Minerals ◽  
Bentonite Clay ◽  
Rif Belt

scholarly journals Modeling and planning of bentonite clay mining: a case study at Bañado de Medina, Melo, Uruguay

2013 ◽  
Vol 66 (4) ◽  
pp. 521-528
Author(s):  
Renato da Silva Marques ◽  
Luis Eduardo de Souza ◽  
Luiz Delfino Albarnaz ◽  
Raul Oliveira Neto
Keyword(s):  
Environmental Impacts ◽  
Bentonite Clay ◽  
Local Environment ◽  
Mineral Deposit ◽  
Mitigation Measures ◽  
Mining Activities ◽  
Short Period ◽  
Geological Complexity

Mining planning and its correct sequencing are essential to facilitate the exploitation of minerals both economically and environmentally, thus ensuring the feasibility of the mining in operational and economic terms. The small geological complexity or the low aggregate value of a mineral deposit tends to result in the planning stages being neglected, so the mining begins without the necessary detailing or it is only scheduled for a short period of time. Thus, in order to ensure a sustainable sequence of operations, and to predict the environmental impacts caused by mining activities and suggest options that would allow the establishment of mitigation measures for these impacts, the feasibility of the technical and economic utilization was evaluated for an occurrence of bentonite in the Bañado de Medina deposit located in the Department of Cerro Largo, Uruguay, respecting the local environment in the process so as to give the project a strong character of sustainability.

scholarly journals BENTONITE APPLICATIONS IN SIMPLE PURIFICATION OF BULK COOKING OIL AS ALTERNATIVE SOLUTIONS FOR HOUSEHOLD COST EFFICIENCY

2021 ◽  
Vol 5 (2) ◽  
pp. 63-72
Author(s):  
Mira Meirawaty ◽  
Christin Palit ◽  
Dyah Ayu Setyorini ◽  
Moehammad Ali Jambak
Keyword(s):  
Clay Minerals ◽  
Palm Oil ◽  
Earth Science ◽  
Raw Materials ◽  
Oil Quality ◽  
Bentonite Clay ◽  
Crude Palm Oil ◽  
Strong Activity ◽  
Food Ingredients ◽  
Cooking Oil

Utilization of Crude Palm Oil (Crude Palm Oil) in food cooking activities is a strong activity in Indonesian society, more than 80% of household activities use this type of oil to process food ingredients. The affordable price with a variety of packaging makes this type of cooking oil has many fans. A survey that has been conducted on residents of the Kalideres area with a total of 20 respondents stated that in addition to using new palm cooking oil in cooking activities, the majority of residents are also accustomed to using this oil used in cooking activities that require the deep-fried method. The quality of cooking oil is largely determined by the level of purity of the solution, the clearer the color of the solution, the better the quality, the darker the color of the solution indicates the presence of more impurities, the higher the saturated fatty acid emulsion, indicating poor cooking oil quality. This is what was raised in this community service (CS) activity, namely socializing alternatives to the use of purified bulk cooking oil. The purification material uses bentonite clay minerals which are heated and dissolved in a certain amount and duration of time which is able to maximize the adsorption power of impurities according to the natural structure of bentonite. CS activities carried out online include counseling and training activities for housewives in the economically densely populated Kalideres area. Through the socialization program for the purification of bulk cooking oil using bentonite clay minerals, it is hoped that residents will have an alternative to reduce the cost of processing food raw materials in a more effective and healthy way. This program is also expected to function as a medium to socialize the application of earth science in helping activities of daily living.

scholarly journals Characteristics of Shale Wettability by Contact Angle and Its Influencing Factors: A Case Study in Songliao

2021 ◽  
Vol 9 ◽  
Author(s):  
Haitao Xue ◽  
Zhentao Dong ◽  
Shansi Tian ◽  
Shuangfang Lu ◽  
Ce An ◽  
...  
Keyword(s):  
Contact Angle ◽  
Clay Minerals ◽  
Influencing Factors ◽  
Aqueous Media ◽  
Mineralogical Composition ◽  
Low Salinity ◽  
Pre Treatment ◽  
Set Up ◽  
Angle Method

Wettability is a significant factor in the exploration and development of shale oil. Currently, shale wettability has yet to reach a unified understanding. The contact angle is widely used in the study of shale wettability. However, the pre-treatment of the shale profoundly affects the contact angle. In this paper, the contact angle errors introduced by the pre-treatment of samples are discussed. Shale wettability is influenced by many factors, and there is not yet a systematic study of its influencing factors. Based on the above issues, the shale of the northern Songliao Basin was taken as the subject. The wettability of the different lithofacies is characterized by an improved contact angle method. The compositional characteristics of the shales and oil in the study area were analyzed. Fresh minerals, a single component of oil, and different temperature/pressure conditions were set up to investigate the influencing factors of shale wettability. The studies show that Organic matter abundance and thermal maturity have a positive correlation with oil-wet. Siliceous minerals are positively correlated with water-wet. Carbonate and clay minerals are negatively correlated with water-wet. The mineralogical composition of the shale, the composition of the oil, the characteristics of the aqueous media, the asphaltene deposits on the surface, temperature, and pressure all impact wettability. The affinity of minerals for hydrocarbons is iron minerals > carbonate minerals > clay minerals > siliceous minerals. Minerals are more hydrophilic at low salinity conditions. The deposition of non-hydrocarbons and asphaltenes renders the surface oleophilic. Increasing temperatures will reduce the hydrophilicity of the “oil-water-rock”.

scholarly journals Case Study of Pharmaceutical Ingredients Derived from Clay Minerals

2015 ◽  
Vol 48 (3) ◽  
pp. 221-229
Author(s):  
Su-Eon Jin ◽  
Jangik Ike Lee ◽  
Sung-Joo Hwang
Keyword(s):  
Clay Minerals ◽  
Pharmaceutical Ingredients

Bentonites -

2021 ◽  
Author(s):  
Wen-An Chiou ◽  
Helmut Coutelle ◽  
Andreas Decher ◽  
Michael Dörschug ◽  
Reiner Dohrmann ◽  
...  
Keyword(s):  
Clay Minerals ◽  
Bentonite Clay ◽  
Drilling Mud ◽  
Uptake Capacity ◽  
Water Uptake Capacity ◽  
High Level Nuclear Waste ◽  
And Performance ◽  
Swelling Clay Minerals ◽  
High Level ◽  
And Control

<p><b>Bentonites</b> are rocks mostly consisting of swelling clay minerals. They were first described from the Cretaceous Benton Shale near Rock River, Wyoming, USA. </p> <p> Because of their useful properties (e.g. highly adsorbent, cation exchanging, swelling), bentonites have many uses, in industry (among them as drilling mud, purification agent, binder, adsorbent, paper production), culture (for e.g. pottery) and medicine/cosmetics/cat litter, civil engineering, and in the future even in the disposal of high-level nuclear waste. </p> <p> Particular chemical characteristics of bentonite clay minerals are rather variable but critically determine their suitability for a particular application. </p> <p> The 15 specialist authors discuss bentonite terminology, classification and genesis and use in eight chapters. Individual chapters deal with the methods bentonites are analysed with, their properties and performance in terms of parameters such as cation exchange capactiy, rheology, coagulation concentraion, water uptake capacity, free swelling, and electrical resistivity (amongst others). </p> <p> A chapter is dedicated to the sources of bentonites, the technology employed to produce them, and how quality control is carried out both in the mine and the laboratory. A further chapter is dedicated to methods of processing the mined material, different activation methods, drying, grinding, and purification. </p> <P> Use cases for bentonites are discussed in a chapter of its own. References, a section on norms and standards, and a list of abbreviations complete the text. </p> <p> The volume addresses students, researchers, and professionals in the mineral industry dealing with bentonite and their clay-mineral constituents, quality assessement and control, and persons that use bentonites in their products. </p>

An original molecular approach to the use of clay minerals in the formulation of oil-based dyes and their sensitivity toward polar solvents - A case study

2019 ◽  
Vol 147 ◽  
pp. 142-149
Author(s):  
Thiago G. Costa ◽  
Beatriz Felix Pimenta da Silva ◽  
Lucas Palma Mattos ◽  
Diogo Alexandre Siebert ◽  
Gustavo A. Micke ◽  
...  
Keyword(s):  
Clay Minerals ◽  
Molecular Approach ◽  
Polar Solvents

Thermogravimetry/evolved water analysis (TG/EWA) combined with XRD for improved quantitative whole-rock analysis of clay minerals in sandstones

Clay Minerals ◽  
1995 ◽  
Vol 30 (1) ◽  
pp. 27-38 ◽  
Author(s):  
D. M. Thornley ◽  
T. J. Primmer
Keyword(s):  
Clay Minerals ◽  
Clay Mineral ◽  
Water Analysis ◽  
Infrared Detector ◽  
Size Fraction ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Northern North Sea ◽  
Rock Analysis

AbstractCurrent methods of quantitative whole-rock clay mineral analysis of sandstones often provide little more than an estimate of clay mineral abundances, especially where the total clay mineral content is <10 wt% of the sandstone. More accurate determinations of clay mineral abundance in the whole rock can be made by combining thermogravimetry/evolved water analysis (TG/EWA) and X-ray diffraction (XRD) data. The TGA/EWA system incorporates a purpose built thermobalance linked to a water specific infrared detector which is used to measure quantitatively the clay mineral dehydroxylation water evolved from the whole rock when heated from 250°C to 900°C. This gives a measure of the total hydroxyl content of the clay minerals in the whole rock which, when combined with XRD analysis of a separated clay size-fraction, enables individual clay mineral abundances in the whole-rock sample to be determined. Results on artificial sand/clay mineral mixtures prepared with known amounts of different clay minerals (chlorite, illite and kaolinite) show that the accuracy of the combined method is most influenced by the accuracy of the XRD data. Errors associated with TG/EWA were found to be negligible by comparison. A case study is included in which the technique has been used to determine accurately the illite abundance in the Magnus Sandstone Reservoir, Northern North Sea.

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