Effects of Heating and Acid Activation on the Structure and Surface Properties of a Kaolinite-illite-smectite Clayey Mixture

Landoulsi, O.

doi:10.2174/1874841401306010013

Cited by 14 publications

(5 citation statements)

References 25 publications

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“…Thus, the treatment of layered silicates with solutions of inorganic acids, mainly HCl or H 2 SO 4 , significantly increases the specific surface area of the samples and their porosity. This is due to changes in the structure of aluminosilicates in the course of acid activation, namely, partial or complete dissolution of the marginal layers of clay minerals and leaching of aluminum from the structure, depending on the conditions of the process [20].…”

Section: Research Resultsmentioning

confidence: 99%

Water purification from cationic organic dyes using kaolin-based ceramic materials

Бондарєва

Yaichenia

Zahorodniuk

et al. 2022

TAPR

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The development of effective sorbents based on cheap natural raw materials for water purification from synthetic organic dyes is an important environmental problem. It is known that layered silicates are distinguished by mechanical strength, thermal and chemical resistance, high dispersion, ion exchange, availability and low cost. However, the main disadvantage of natural clays is their insufficiently high sorption capacity with respect to organic toxicants. Therefore, to increase it, the surface of clay minerals is modified by various physical and chemical methods. The object of study is kaolin from the Glukhovets deposit (Ukraine), the main rock-forming mineral of which is kaolinite. After its thermal modification followed by acid activation with chloride acid, sorbents with sufficiently high structural-sorption properties and increased sorption capacity with respect to the synthetic organic dye, methylene blue, are obtained. The influence of the conditions for the synthesis of ceramic materials on the physicochemical features of the dye removal from the aqueous medium is studied. The dependence of the values of methylene blue sorption by silicate sorbents on the temperature of kaolin treatment and the concentration of chloride acid, which was used for its acid activation, is studied. It has been established that the specific surface of the obtained samples is significantly affected by both the kaolin treatment temperature and the concentration of perchloric acid. Thus, under certain experimental conditions, sorption materials were obtained with a specific surface area of 140 m2/g, which significantly exceeds that for the original kaolin, which is 9 m2/g. A significant increase in the sorption capacity of acid-activated samples compared to the original clay and heat-treated forms was established. The value of the maximum sorption of methylene blue for acid-activated samples exceeds that for natural kaolin by almost 2 times and reaches 16 mg/g.

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Section: Research Resultsmentioning

confidence: 99%

Water purification from cationic organic dyes using kaolin-based ceramic materials

Бондарєва

Yaichenia

Zahorodniuk

et al. 2022

TAPR

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“…Hal tersebut terlihat dari penurunan yang signifikan pada nilai lemak kasar pelet selama penyimpanan. Menurut Landoulsi et al (2013) mineral pengikat seperti bentonit dan kaolin perlu diaktivasi sebelum penggunaan dengan penambahan asam kuat, agar porositas dan luas permukaannya meningkat sehingga kemampuan adsorbennya lebih baik.…”

Section: Lemak Kasarunclassified

http://medpub.litbang.pertanian.go.id/index.php/semnas-tpv/article/view/1778

Hardianti¹,

Sulistiyanto²,

Sumarsih³

2017

Teknologi Peternakan Dan Veteriner Mendukung Diversifikasi Sumber Protein Asal Ternak

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Hatchery waste is potential as an alternative feedstuff, because it has highly nutritional content. However, the hatchery waste was characterized by easily rotten, therefore, it was difficult to be stored. An addition of bentonite as an absorbent to the pelleting process was expected could overcome to weaknesses of hatchery waste. The study was conducted by a completely randomized design (CRD) by factorial pattern 2×3 with 3 replications of each combination. The treatments were addition of bentonites (0 and 3%) and period of storage (4, 8 and 12 weeks). The parameters observed were crude fat, crude protein, calcium and phosphorus pellet products. The result of experiment shows that there is no interaction effect (P>0.05) between bentonite addition and period of storage. Bentonite levels had no significant effects (P>0.05) but period of time had significant effect (P<0.05) on all parameters. On average, the value of each parameter is in the normal range. The chemical quality of the pellet decreased during storage shown by decreasing values. It was concluded that the addition of bentonite did not effectively prevent the quality of hatchery waste pellet during storage. Therefore, the hatchery waste pellets should be stored no longer than four weeks.

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“…Moreover, the applicability of clay in a specific industry depends on the functionality and nature of the content of clay mineral(s). The characteristics of a clay mineral, on the other hand, rely largely on its internal shape and chemical composition [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effects of Grog Additions on Some Refractory Properties of Raw (Abusoro) Kaolin Clay Deposit for Furnace Lining

Aluko

Ikubuwaje

2020

AIR

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The influence of the weight of grog on some refractory properties of raw Abusoro clay samples found in Abusoro Village, Ondo State, Nigeria was evaluated. These samples were presented for refractory tests (apparent porosity, linear shrinkage, refractoriness, bulk density and cold crushing strength). The weights of the grog were varied from 20-40 wt. % in the blend. The chemical and microstructural examinations of the untreated alumino-silicate Abusoro clay samples indicated that they are abundant in silica, SiO2 (62.74wt. %) and alumina, Al2O3 (31.42wt. %). Other minor compounds found are Fe2O3 (1.43%), K2O (0.30%) with no trace amounts of MgO (0.00); therefore, they are regarded as alumino-silicate. Particular observation is made on MgO with zero amounts and the total of K2O + Na2O + MgO which are less than 2% in the clay samples. These results signify that the clay possesses high viability for manufacturing of refractory bricks, pulp and paper, ceramics, fertilizers, paint and cement. The performance evaluations of the refractory bricks measured indicated acceptable and satisfactory results vis-à-vis standard refractory properties for refractory fireclay bricks. However, the apparent porosity (43.2%) and CCS (21.21MPa) obtained for Abusoro clay sample at 30% weight of grog may as well be suitable for insulating refractory applications. The high apparent porosity could be an indication of high content of silicon oxide in the raw clay.

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Effects of Heating and Acid Activation on the Structure and Surface Properties of a Kaolinite-illite-smectite Clayey Mixture

Cited by 14 publications

References 25 publications

Water purification from cationic organic dyes using kaolin-based ceramic materials

Water purification from cationic organic dyes using kaolin-based ceramic materials

http://medpub.litbang.pertanian.go.id/index.php/semnas-tpv/article/view/1778

Effects of Grog Additions on Some Refractory Properties of Raw (Abusoro) Kaolin Clay Deposit for Furnace Lining

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