Immobilization of copper ions laden kaolin waste: influence of thermal treatment on its immobilization in cement paste

Tantawy, M. A.; Ahmed, Salwa A.; Abdalla, E. M.; Qassim, Mostafa I.

doi:10.1007/s10163-014-0328-9

Cited by 8 publications

(7 citation statements)

References 41 publications

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“…The band at 465 cm -1 is responsible for the bending O-Si-O vibration 48 . The bands at 3700 and 3621 cm -1 are due to elongation vibrations of OH-groups sitting at the edges of the kaolin platelets 49 . The band at 3618 cm -1 is connected with the internal OH-groups 49 .…”

Section: Resultsmentioning

confidence: 99%

“…The bands at 3700 and 3621 cm -1 are due to elongation vibrations of OH-groups sitting at the edges of the kaolin platelets 49 . The band at 3618 cm -1 is connected with the internal OH-groups 49 . The bands at 1610 and 3691 cm -1 are responsible for the bending HO-H vibrations of adsorbed water molecules49.…”

Section: Resultsmentioning

confidence: 99%

“…The new absorption band at 910 cm -1 is due to the Si-O-H bending vibrations of the hydrated silica formed in a leaching process that involves the replacement of Al of Al-O-Si structure with H + 53 . The band at 3616 cm -1 is attributed to the internal OH-groups 49 . The bands at 1620 and 3685 cm -1 are responsible for the bending HO-H vibrations of adsorbed water molecules 49 .…”

Section: Resultsmentioning

confidence: 99%

“…The band at 3616 cm -1 is attributed to the internal OH-groups 49 . The bands at 1620 and 3685 cm -1 are responsible for the bending HO-H vibrations of adsorbed water molecules 49 . The band at 1086 cm -1 is attributed to Si-O-Si asymmetric stretching vibrations 54 .…”

Section: Resultsmentioning

confidence: 99%

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Extraction of Alumina from Nawan Kaolin by Acid Leaching

Tantawy

Alomari

2019

Orient. J. Chem

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This paper investigated the production of alumina from Nawan kaolin by acid leaching with sulfuric and hydrochloric acids. Kaolin was calcined at 850°C and was leached with 6 M acid at 90°C, 5M NaOH followed by HCl solutions were added to the leaching liquor, and the precipitated aluminum hydroxide was converted to alumina by calcination at 900°C. Materials were characterized by FTIR, XRD, and SEM techniques. The alumina extraction percent was determined at different leaching times (30-180 min) and solid/liquid ratios (0.05-0.15 g/ml). The purity of kaolin is about 95%. The percent of extraction of alumina rapidly increases with the solid/liquid ratio up to 0.1 g/ml then decreases thereafter. The percent of extraction of alumina is higher for HCl than H2SO4. The size of the chloride and sulfate ions is the key factor that controls the percent of extraction of alumina from calcined kaolin under the studied conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Extraction of Alumina from Nawan Kaolin by Acid Leaching

Tantawy

Alomari

2019

Orient. J. Chem

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“…3 Adsorption Science & Technology of part minerals in kaolin is strong, like ion adsorption decreasing characteristic peaks of XRD [33,34]. With increasing the content of Fe, the two characteristic peak intensities of quartz are gradually weak in Figure 2.…”

Section: As(iii) Removal By Minerals At Different Initial As(iii)mentioning

confidence: 99%

The Effect of Proton and Arsenic Concentration on As(III) Removal by Hematite and Kaolin Complexes

Lan

Zhou

Zhang

et al. 2021

Adsorption Science & Technology

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With the intensification of human activities, arsenite (As(III)) pollutant from the soil and ground water has been a threat to human health, and the problem gradually becomes the focus of attention. In this study, the effects of several environment factors on As(III) removal ability of complex minerals are determined through the analysis of mineralogical characteristics of the complex synthesis of hematite and kaolin, using X-ray diffraction, Fourier transform infrared, and specific surface area. In the results, the XRD patterns of hematite and kaolin complexes indicate that the loading covers up some characteristic peaks of minerals in kaolin, which can be that hematite loading decrease the order of structure for some minerals. With increasing Fe content, the hydroxyl sites gradually increase, therefore strengthening the As(III) removal ability of complexes. With increasing the As(III) concentration, the removal ratios of kaolin on As(III) almost keep unchanged and that of complexes show no obvious regularity. However, with the pH increasing, the removal ratios of all samples keep increasing. Furthermore, the increasing of As(III) concentration and pH both improve As(III) removal amount significantly, especially for As(III) concentration. In addition, there is no forming of new mineral through it as observed by XRD. Therefore, hematite loading can promote the As(III) removal on kaolin through adsorption in different environments, which can provide a better method for the remediation of arsenic pollution.

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The impact of stabilizing amendments on the microbial community and metabolism in cadmium-contaminated paddy soils

Chen

Xie

et al. 2020

Chemical Engineering Journal

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Immobilization of copper ions laden kaolin waste: influence of thermal treatment on its immobilization in cement paste

Cited by 8 publications

References 41 publications

Extraction of Alumina from Nawan Kaolin by Acid Leaching

Extraction of Alumina from Nawan Kaolin by Acid Leaching

The Effect of Proton and Arsenic Concentration on As(III) Removal by Hematite and Kaolin Complexes

The impact of stabilizing amendments on the microbial community and metabolism in cadmium-contaminated paddy soils

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