Kinetic modeling of the bioleaching process of iron removal from kaolin
A kinetic model was developed to assess the influence of batch cultivation of Aspergillus niger on the bioleaching of iron from kaolin. A simple model was proposed using the logistic equation for growth, and the Luedeking–Piret equations for iron removal, acid formation and sucrose consumption.
Physiochemical Characterization of Ethiopian Mined Kaolin …
Beneficiation of natural kaolin is an advanced process to improve kaolin's whiteness and refine it from chemical and physical impurities such as metallic oxides …
Iron Removal from Kaolin Waste Dumps by Chemical …
Elimination of iron from kaolin using either a chemical or a biological method was the aim of this study. The chemical leaching of iron from kaolin was carried out using response …
Kaolin-iron cross-linked alginate beads for efficient phosphate removal
This research aims to investigate the process of removing phosphate ions from water using iron cross-linked alginate beads incorporating kaolin (Alg@K…
Removal of Fe from Kaolin using Dissimilatory Fe (III) …
LongYan kaolin has a large Fe content which affects the coloring. Bioleaching treatments to remove Fe impurities were conducted here using indigenous dissimilatory Fe(III)-reducing bacteria.
Removal of iron and titanium contaminants from Jordanian …
KEYWORDS Kaolin clay; dithionite; titanium and iron impurities; chemical leaching; brightness The iron removal processes can be categorized as physical, chemical or a combination of both such as sieving, magnetic separation [8,9], EDTA [10], selective flocculation [11], carbohydrates [12], leaching with various chemicals like oxalic acid and ...
Purifying Kaolin: Removing Iron Impurities Made …
The kaolin coagulation or flocculation method mainly removes iron and titanium impurities in kaolin. The pulp concentration must be lower than 20%, so a large amount of water needs to be released in …
Bioleaching of iron from highly contaminated Kaolin clay by …
The bioleaching of iron oxides by A. niger isolated from pistachio shell resulted in removal of 42.8% of the total iron in the clay, and suggested that this strain has a good ability to remove iron impurities from kaolin.
The Properties of Kaolin and Its Applications | AMI
Kaolin clay is a highly versatile, effective, and beneficial natural mineral with diverse uses and applications across a range of industries. If you are looking for mineral ingredients to optimize your …
Refinement of industrial kaolin by microbial removal of iron …
The commercial value of kaolin raw materials is greatly affected by the presence and content of iron-bearing impurities, which can have a detrimental …
8 methods and characteristics of iron removal and whitening of kaolin clay
Jackson studied the chlorination of kaolin minerals to remove impurities, mainly iron and titanium, to achieve mineral bleaching. The chlorination method removes iron and titanium from clay minerals, especially kaolin.
Biological beneficiation of kaolin: A review on iron removal
The bioleaching process requires lower energy and cost in comparison to the conventional processes to remove iron in kaolin such as selective flocculation, froth flotation, and magnetic separation ...
Microbial refinement of kaolin by iron-reducing bacteria
Low-grade kaolin contains Fe(III) impurities, which cause the detraction of refractoriness and whiteness of porcelain and pottery. Microbial refinement of low-grade kaolin to remove Fe(III) by ...
Biological beneficiation of kaolin: A review on iron removal
The purpose of this review was to depict an overview of the status of biological removal of iron from clays, evaluate and compare the results, and to …
Kaolin Clay Benefits, Uses and Side Effects
Kaolin clay is a soft, white clay that contains minerals, including kaolinite, which has cleansing and soothing effects on the skin. It can also be used on the teeth and hair and taken internally to manage diarrhea.
Synthesis and characterization of nano zerovalent iron-kaolin clay …
In this study, Kaolin clay, a mining material, was used as an abundant and available mineral as zero-valent iron-kaolinite composites for As 2 O 3 removal from the water samples. The composites were made by the sodium borohydrate reduction method.
Iron removal from kaolin by oxalic acid using a novel pre …
This study reports a leaching process along with a novel physical pretreatment technique to remove iron impurities from kaolin using oxalic acid. A detailed examination of the …
Designing and optimization of separation process of iron …
Removing of iron from kaolin by oxalic acid in a bench-scaled stirred-tank reactor • Designing and optimization of leaching based on three variables using RSM • Increase in iron removal with an increase in experimental variables • Measuring of residual iron in kaolin after leaching and three stages washing •
Removal of mineral impurities from kaolin using flotation
Unlike many flotation processes where the desired component is concentrated in the froth, kaolin flotation is the reverse of this, i. e., the undesired component is removed in the …
Factorial experiments for iron removal from kaolin by …
Request PDF | Factorial experiments for iron removal from kaolin by using single and two-step leaching with sulfuric acid | In the present study, to investigate the effects of acidic leaching on ...
Iron removal from a kaolinitic clay by leaching to obtain …
The goal of this research was to remove iron oxide from Ibute-Nze kaolin by dissolving the clay mineral in an aqueous oxalic acid solution and optimizing the process.
Kaolin | Uses, Benefits, and Safety Precautions | Britannica
Kaolin, soft white clay that is an essential ingredient in the manufacture of china and porcelain and is widely used in the making of paper, rubber, paint, and many other products. ... It is often necessary to bleach the clay chemically to remove the iron pigment and to wash it with water to remove the other minerals in order to prepare …
Biological beneficiation of kaolin: A review on iron removal
Application of mineral bio-beneficiation to remove iron oxyhydroxides from kaolinite clays has been the center of interest in recent decades, and many research works over the world have been dedicated to study the potential of this approach for upgrading the clay whiteness and refractoriness while preserving the inherent specifications and …
Bioleaching of iron from highly contaminated Kaolin clay by …
Semantic Scholar extracted view of "Bioleaching of iron from highly contaminated Kaolin clay by Aspergillus niger" by M. Hosseini et al.
Iron Removal from Kaolin Waste Dumps by Chemical (Oxalic …
The current study investigated chemical leaching of iron from kaolin using citric and oxalic acids, and the microbial removal of Fe (III) present in kaolin, using pure …
Kaolin Clay Anemia
Kaolinite, a component of kaolin clay, reduces iron absorption in the duodenum . Therefore, ingestion of large amounts of kaolin over time can lead to an iron-deficient state. It is important for medical practitioners to understand and recognize this association as numerous diagnostic tests can be averted with a simple history.
Bioleaching of iron from kaolin using Fe(III)-reducing …
This paper studied the effects of different carbon and nitrogen sources on the removal of iron impurities from kaolin using dissimilatory Fe(III)-reducing bacteria (DIRB).
Iron removal from kaolin using binuclear rare earth complex …
One kind of binuclear rare earth complex with high catalytic activity was prepared. • Iron was effectively removed from kaolin using activated TD as the reductive agent.
Impact of Bacillus species on Fe reduction of kaolin in …
Abstract Conventional techniques to remove Fe impurities in kaolin typically involve high environmental impact and cost. Alternative methods have been focused on the use of bioleaching where Fe in kaolin is reduced with microorganisms. Early results established a noticeable effect of the bacteria on the redox state of Fe, but knowledge …
Removal of iron and titanium contaminants from Jordanian …
The goal of this research was to remove iron oxide from Ibute-Nze kaolin by dissolving the clay mineral in an aqueous oxalic acid solution and optimizing the process.
Removal of mineral impurities from kaolin using flotation
Iron is a powerful discolorant and removal of even a small additional amount would give a further brightness improvement in the product. REMOVAL OF MINERAL IMPURlTlES FROM KAOLIN ... "Purification of Kaolin Clay by Froth Flotation Using Hydroxamate Collectors", U.S. Patent 4,629,556, Dec. 16. Yoon, ...
Removal of Iron and Manganese from Groundwater Using …
The highest removal obtained in the study was iron removal, which was 95.47%. MK4 was the best adsorbent among all adsorbents. The adsorption performance of MK1 was inconsistent in comparison to MK2 and MK3. ... Metakaolin is thermally modified (calcination) kaolin. Calcined clay or metakaolin may have the ability to perform similar …
Understanding Iron Impurities in Australian Kaolin and Their …
Iron impurities present in the crystal structure of kaolin minerals or in accessory species are frequently encountered in clay deposits. As knowledge of the location and states of the iron is crucial when modifying the properties of clays by activation, it is important that new deposits are well characterized in terms of the amount and location of this metal. The …
(PDF) Refinement of industrial kaolin by microbial removal of iron
The commercial value of kaolin raw materials is greatly affected by the presence and content of iron-bearing impurities, which can have a detrimental effect on the whiteness and refractoriness of ...