Structure and Mineral Composition of Soil Cement Based on Kaolinite Clay Modified with a Complex Hydrophobic–Plasticizer Additive Based on Polycarboxylate Ether and Octyltriethoxysilane

Буланов, П Е; Ermilova, Elizaveta; Рахимов, Р З; Stoyanov, O. V.

doi:10.1134/s199542122004005x

Cited by 1 publication

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“…Generally, the most famous and abundance silicate clay minerals-kaolinite has chemical composition Al 2 Si 2 O 5 (OH) 4 that, occurred invariably in all continentals (Kadir et al 2014). The main uses of kaolinite cover many industrial areas inclusive but not limited to ceramics (Zeballos et al 2016), cosmetics (Kamitsou et al 2018), painting (Hradil et al 2017) and cement (Bulanov et al 2020). Indeed, scientifically main uses of kaolinite concentrated in adsorption studies (El-Maadawy 2019) and surpass cement and ceramics studies.…”

Section: Introductionmentioning

confidence: 99%

Thermal activation of kaolinite titanium hydroxide composite for uranium adsorption from aqueous solutions

Hagag

Esmaeel

Salem

et al. 2022

Int. J. Environ. Sci. Technol.

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In the present study, thermally treated kaolinite at 600 ºC was incorporated with titanium hydroxide produced from ilmenite to prepare a novel, low-cost and a promising adsorbent (KT). Different analytical techniques such as FTIR, EDS, SEM were used to determine its structural analysis. Its applicability for uranium uptaking and desorption from its aqueous solutions was investigated by varying controlling conditions including pH, shaking time, initial concentrations, temperature and KT dose weight. Untreated kaolinite showed zero loading capacity and adsorption efficiency towards uranium ions, on the contrary thermal activation and incorporation with Ti(OH)4 improved its performance. Batch results for adsorption experiments showed that loading capacity of (KT) reached 160mgg−1; at pH 5, after only 20 min shaking time. Uranium adsorption process was much closer to a traditional Langmuir adsorption isotherm with a theoretical saturation capacity of 161.3mgg−1. From thermodynamics data, the adsorption process is endothermic in nature which emphasized by elevating temperature has an enhancement effect on uranium adsorption with uptake of 205 mgg−1 at 60 ℃. Uranium adsorption was kinetically fitted with the pseudo-second-order model. KT composite has a high applicability and reusability due to its high resistance to extreme acidity levels.

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