Technical properties of compounded kaolin sample from Griva (Macedonia, Greece)

Galán, E.; Aparicio, Patricia; Miras, A.; Michailidis, Kleopas; Tsirambides, A.

doi:10.1016/0169-1317(95)00041-0

Cited by 35 publications

(18 citation statements)

References 5 publications

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“…3 and 4) presents the NTB-modified adsorbent having particles bearing more whitish substance than the unmodified adsorbent. These substances have been described to be non-clay materials [26] which in this case will include sodium tetraborate reagent. …”

Section: Physicochemical Characteristicsmentioning

confidence: 99%

Equilibrium, kinetic and sorber design studies on the adsorption of Aniline blue dye by sodium tetraborate-modified Kaolinite clay adsorbent

Unuabonah

Adebowale

Dawodu

2008

Journal of Hazardous Materials

128

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Section: Physicochemical Characteristicsmentioning

confidence: 99%

Equilibrium, kinetic and sorber design studies on the adsorption of Aniline blue dye by sodium tetraborate-modified Kaolinite clay adsorbent

Unuabonah

Adebowale

Dawodu

2008

Journal of Hazardous Materials

128

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“…The unmodified kaolinite adsorbent showed some white particles on the surface of the mineral particles. These were likely to be non-clay minerals like Sodium, Potassium, Calcium, Iron and Magnesium oxides (Galan et al 1996).…”

Section: Desorption Kineticsmentioning

confidence: 99%

Comparison of sorption of Pb2+ and Cd2+ on Kaolinite clay and polyvinyl alcohol-modified Kaolinite clay

et al. 2008

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Kaolinite clay obtained from Ubulu-Ukwu, Delta state in Nigeria was modified with polyvinyl alcohol (PVA) reagent to obtain PVA-modified Kaolinite clay adsorbent. Scanning Electron Microscopy (SEM) of the PVA-modified adsorbent suggests that Kaolinite clay particles were made more compact in nature with no definite structure. Modification of Kaolinite clay with PVA increased its adsorption capacity for 300 mg/L Pb 2+ and Cd 2+ by a factor of at least 6, i.e., from 4.5 mg/g to 36.23 mg/g and from 4.38 mg/g to 29.85 mg/g, respectively, at 298 K. Binary mixtures of Pb 2+ and Cd 2+ decreased the adsorption capacity of Unmodified Kaolinite clay for Pb 2+ by 26.3% and for Cd 2+ by 0.07%, respectively. In contrast, for PVA-modified Kaolinite clay, the reductions were up to 50.9% and 58.5% for Pb 2+ and Cd 2+ , respectively. mainly by chemisorption and is concentration dependent. However, kinetic adsorption data from both adsorbent generally failed the Pseudo-First order Kinetic model (PFOM) test.Extents of desorption of 91% Pb 2+ and 94% Cd 2+ were obtained, using 0.1 M HCl, for the Unmodified Kaolinite clay adsorbent. It was found that 99% Pb 2+ and 97% Cd 2+ , were desorbed, for PVA-modified Kaolinite clay adsorbents within 3 min for 60 mg/L of the metal ions adsorbed by the adsorbents.

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“…The band at 3621 cm -1 is connected with the internal hydroxyl groups. [36]. The band at 918 cm -1 is attributed to the bending Al-O-H vibrations (hydroxyl groups sitting on the alumina faces).…”

Section: Resultsmentioning

confidence: 97%

“…is in octahedral coordination [36]. Lastly, bending O-Si-O vibrations are responsible for the band at 480 cm -1 [36][37][38]. It was observed that the intensity of absorption bands of free water (moisture) centered around 1660 and 3470 cm -1 is strongly reduced in case of kaolin waste.…”

Section: Resultsmentioning

confidence: 98%

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

Tantawy

Ahmed

Abdalla

et al. 2014

J Mater Cycles Waste Manag

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This work aims to study the influence of thermal treatment of Cu 2? laden kaolin wastes on its immobilization efficiency in cement paste. Compressive strength and toxicity characteristic leaching procedure (TCLP) of 5-20 % kaolin waste blended cement pastes were tested. X-ray diffraction (XRD) results illustrate that adsorption of Cu 2? ions modify the crystal structure of kaolinite mineral. Fourier transform infrared (FTIR) results indicate that the adsorption sites on the kaolin surface that were occupied with free water molecules have been replaced with Cu 2? ions adsorbed from aqueous solutions. The thermal treatment of kaolin waste improves fixation ratio of Cu 2? in cement pastes containing up to 20 % of thermally treated waste. This is due to: pozzolanic activity of calcined kaolin, conversion of leachable adsorbed Cu 2? ions into encapsulated unleachable phase that does not retard the hydration of cement as well as adsorption of much of leachable Cu 2? ions on surfaces of hydration products and occlusion in its lattice structure as illustrated from XRD, FTIR, thermogravimetric, scanning electron microscopy and TCLP results. The fixation ratio of Cu 2? in cement paste blended with 20 % of thermally treated kaolin waste, reaches maximum value of about 97 % compared to 82 % for cement paste blended with 20 % of untreated kaolin waste.

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Technical properties of compounded kaolin sample from Griva (Macedonia, Greece)

Cited by 35 publications

References 5 publications

Equilibrium, kinetic and sorber design studies on the adsorption of Aniline blue dye by sodium tetraborate-modified Kaolinite clay adsorbent

Equilibrium, kinetic and sorber design studies on the adsorption of Aniline blue dye by sodium tetraborate-modified Kaolinite clay adsorbent

Comparison of sorption of Pb2+ and Cd2+ on Kaolinite clay and polyvinyl alcohol-modified Kaolinite clay

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

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