2021-7-10 · In view of promising adsorption efficiency of clay based materials, a modified iron-kaolin clay was used as an adsorbent of Pb(II) and Cd(II) ions from aqueous solutions. The effects of various experimental parameters, such as initial metal ions concentration, contact time, temperature and pH were investigated. The Langmuir and Freundlich adsorption isotherm models were applied to the ...
2011-10-24 · Iron is the main contaminant in clay and kaolin minerals. The removal of iron from kaolin is of par-ticular importance in the paper industry, among others, where purity requirements are high. In these minerals, iron can form part or not of the kaolinite crystalline lattice. When it is inside, low concentrations do not affect coloration.
2019-8-16 · Elevated iron content in low-grade kaolin is one of the chemical factors detrimental for its industrial applications. Therefore, various physical and chemical methods have been applied to decrease iron concentration in kaolin. One of the more feasible and environmentally friendly method is biobenefication via microbially-induced bioextraction. Therefore, this paper provides data on fungal ...
2010-8-1 · 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)-reducin
2021-6-22 · In view of promising adsorption efficiency of clay based materials, a modified iron-kaolin clay was used as an adsorbent of Pb(II) and Cd(II) ions from aqueous solutions. The effects of various experimental parameters, such as initial metal ions concentration, contact time, temperature and pH …
2013-3-1 · In the present study, to investigate the effects of acidic leaching on the iron removal from kaolin clay supplied by Cam-Ser Madencilik A.S., the 2 4 full factorial design of experiments and analysis of variance (ANOVA) were performed. The aim of the initial phase of research was to determine the effects of the main and interaction factors which can potentially influence the iron removal process.
results shown above, iron removal is possible, and this can improve the economic value for this kind of kaolin clay, being possible its use in the ceramic and paper industries as raw material of high quality. Keywords: Iron leaching, Kaolin clay, Kinetics study, Chemical control Introduction
2016-10-22 · for impurity removal from kaolin have been discussed previously (Sennett et al., 1979). THE EFFECT OF DISCOLORING IMPURITIES The brightness and color of the pigment are influenced to a degree by relatively small quantities of (1) discrete, colored impurities present in the kaolin and (2) iron hydroxide stains on the surface of the particles.
2018-5-10 · Gougazeh [32] also achieved a 94% iron oxide removal from Jordanian kaolin clay using sodium dithionite while Hernandez et al., [33] successfully removed …
2019-9-30 · Statistical Treatment of Bleaching Kaolin by Iron Removal 261 Statistical Treatment of Bleaching Kaolin by Iron Removal Román Ángel Hernández Hernández,*1 Felipe Legorreta García,1 Leticia Esperanza Hernández Cruz,1 and Antonia Martínez Luévanos2 1 Universidad Autónoma del Estado de Hidalgo. Área Académica de Ciencias de la Tierra y Materiales.
2010-8-1 · 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. The factors that affect bioleaching efficiency include bioleaching time, carbon source, pH, temperature, pulp density, and inoculum density and these were examined. Environmental scanning electron ...
2015-4-1 · The best outcome (about 43% removal of iron) was attained after one month using the strain isolated from pistachio shell at the lower pulp density (20 vs. 60 g/l) when the clay was added at the beginning of the fungal fermentation, although in runs which kaolin was added on the third day of growth, the initial rate of iron dissolution was ...
2019-7-1 · Removal Of Iron Impurities Of Clay Materials Using Aspergillus Niger N. Siva Shankar*,V. Bhaskar, Dr. A. Ravinder Nath, Dr. E. Nagabhushan And Dr .D. Jaya Prakash Dept. of Chemical Engineering, University College of Technology, O.U., HYD-07. Abstract: The use of microorganisms for bio-leaching operations for the extraction of specific metals
2016-9-9 · free iron from Kerala kaolin is removed by CDB treatment whereas in Gujarat kaolin both free and structural iron associated with titanoferrous impurity was difficult to remove. The crude kaolin contained 1.63 and 0.66 % TiO2 in Kerala and Gujarat kaolin respectively. Reduction of TiO2 in case of Gujarat kaolin was from 1.63 to 0.99%.
Factorial experiments for iron removal from kaolin by using … · Citric acid concentration is the main significant factor of H 2 SO 4 with CA leaching, suggesting that citric acid can be used as an effective reducing agent for iron removal from kaolin clay. For sulfuric acid leaching, 25.0% IEY was achieved at 90 C after 180 min. Get price
2013-12-1 · Two series of bacterial iron-reduction experiments have shown that all tested Shewanella sp. bacterial strains were able to leach iron impurities from industrial kaolins and that among the tested strains, S. putrefaciens CIP8040 is the most efficient in terms of both extent of Fe removal and improvement in the colour properties of the kaolin.
2013-3-1 · In the present study, to investigate the effects of acidic leaching on the iron removal from kaolin clay supplied by Cam-Ser Madencilik A.S., the 2 4 full factorial design of experiments and analysis of variance (ANOVA) were performed. The aim of the initial phase of research was to determine the effects of the main and interaction factors which can potentially influence the iron removal process.
of separating iron oxides contained in it. This kaolin clay comes from Agua Blanca de Iturbide in Hidalgo State (Mexico). The clay was classified and treated to obtain micrometrical particles. This material in solution was studied by voltammetry, this solution showed a cathodic process attributed to reduction of iron in kaolin.
2012-11-30 · The schematic representation of the removal of Fe203 and TiO2 and brightness improvement in the size classified product of Mamuara clay is given in Fig.l. Ultra flotation is more selective to TiO2 removal whereas SC-HGMS can easily remove paramagnetic and feebly magnetic iron and titanium minerals.
2006-8-1 · Iron is the main contaminant in clay and kaolin minerals. The removal of iron from kaolin is of particular importance in the paper industry, among others, where purity requirements are high. In these minerals, iron can form part or not of the kaolinite crystalline lattice. When it is inside, low concentrations do not affect coloration.
Gougazeh [32] also achieved a 94% iron oxide removal from Jordanian kaolin clay using sodium dithionite while Hernandez et al., [33] successfully removed 80% iron oxide from kaolin clay using an ...
2017-6-1 · Iron removal from kaolin using binuclear rare earth complex activated thiourea dioxide Appl. Clay Sci., 126 ( 2016 ), pp. 63 - 67 Article Download PDF View Record in Scopus Google Scholar