(PDF) Spent Kaolin Filter Cake as an Effective Adsorbent for …
Spent Kaolin Filter Cake as an Effective Adsorbent for the Removal of Hexavalent Chromium [Cr (VI)] From Aqueous Solution: Comparative Study of Wastewater Treatment Methods September 2021 South ...
Simultaneous removal of antimony(III/V) and arsenic(III/V) from aqueous
Kaolin is a common variable–charged clay mineral in weathered soils and feldspathic aquifers, and that can serve as an important sink for dissolved Sb and As (Rakshit et al., 2015; Saada et al., ... In general, the pH value in the aqueous solution is a key parameter in the process of adsorption (Yang et al., 2019).
Removal of heavy metal(loid)s from aqueous solution by …
However, the species of As(III) and Sb(III) in aqueous solution mainly existed in the form of As(OH) 3 and Sb(OH) 3 (Figs. S8 (e) and (f)) over a wide pH range from 2.0 to 7.0, The possible reason was that the higher pH promoted the corrosion of FeS, leading to the formation of more Fe (oxyhydr)oxides, which could form the inner–sphere ...
Removal of Some Heavy Metal Cations from Aqueous …
90 oC) and different pH values (3.0, 5.0, 7.0 and 9.0). The pH values of the solutions were adjusted by the addition of 0.01 M or 0.1 M aqueous solutions of NaOH and HCl, as appropriate, before adsorption analysis. The bottles were shaken for 30 min at a mixing rate of 350 rpm and the resulting mixtures
pH of Minerals
We know that we can measure the pH of an aqueous solution by using a pH meter or litmus paper, but what do you do to measure the pH of a mineral such as kaolin? The answer is …
TiO2-kaolinite nanocomposite prepared from the Jordanian Kaolin …
Nowadays, nanomaterials have provided a promising technique for removal of toxic heavy metal ions from water, aqueous solutions and industrial wastewater, due to its low cost-effective, high efficiency, and simple to operate using natural and modified nanomaterial adsorbents for water, aqueous solutions and industrial wastewater such as Alumina ...
Photocatalytic Degradation of Tetracycline in Aqueous Solutions …
Kaolin has been synthesized in the nano-sized (30-60 nm) and examined as a photocatalyst for degradation of tetracycline in its aqueous solution. The photocatalytic behavior was performed under ...
Removal of Cationic Dyes from Aqueous Solutions by Kaolin: Kinetic …
This study looked at the efficacy of acid-activated kaolin (AAK) and acid-activated bentonite (AAB) in reducing the high pH value and iron content of bauxite liquid-residue in a single treatment step.
Aggregation mechanism of colloidal kaolinite in …
To fully disperse kaolinite particle in water, 200 mL 0.2 wt% of kaolinite aqueous suspension was stirred at 6000 rpm for 5 min, and then shaken in an ultrasonic cleaner for 5 min. Next, the pH of the slurry was adjusted and a …
Removal of Methylene Blue from aqueous solutions by adsorption …
Removal of Methylene Blue () from aqueous solutions is studied using a raw Algerian kaolin sample as a low-cost adsorbent. The effects of pH, contact time, dye concentration and temperature are all taken into consideration. The adsorption kinetics results are adjusted to best fit the pseudo-second order model. The experimental data are analyzed by Langmuir …
Preparation of cationic surfactant-modified kaolin for …
Hence, when the pH of solution is less than pHPZC, the CTAB–kaolin surface becomes positive and attracts anions (such as CrO42−) from the aqueous solution, and when it is greater than pHPZC, the surface becomes negative and attracts cations from the solution. Figure 6 shows the Cr(VI) removal (%) efficiency of CTAB–kaolin as a function of pH.
Adsorption of uranium (VI) from aqueous solution on calcined …
Kaolin was purchased from Damao Chemical Reagent Factory (Tianjin, China) and its properties are shown in Table 1.A Stock solution of 1000 mg/L uranium (VI) was prepared by dissolving an appropriate amount of UO 2 (NO 3) 2 ·6H 2 O in deionized water. The initial pH of the working solutions was adjusted by addition of HNO 3 or NaOH solution. 0.1% Arsenazo III …
(PDF) Preparation, Characterization, and Application of …
The differences between the pH value of the initial solution (pHI) and the final solution (pHF) were plotted as a function of pHI. ... Rida, S. Bouraoui, and S. Hadnine, "Adsorption of methylene blue from aqueous solution by kaolin and zeolite," Applied Clay Science, vol. 83-84, pp. 99–105, 2013. [19] V. K. Gupta, R. Jain, M. N ...
Removal of Safranin-O from Aqueous Solution by …
2.4. Adsorption Study 2.4.1. Effect of Initial pH Effect of initial solution pH was investigated using various pH values in the range of 3 - 11. The pHs of solutions were adjusted to the desired pH by adding drops of 0.1 M NaOH or HCl. To 30 ml of aqueous solution containing 100 mg/L BR2 dye, 0.5 g of NRK was added. 2.4.2.
Synthesis and characterization of Ethiopian kaolin for the …
Solution pH, temperature, contact time were fixed as 9, 30 °C 60 min respectively for different dye concentrations (20 mg/L, 40 mg/L, and 60 mg/L).
Removal of Methyl Orange from Aqueous Solution by …
aqueous solution is of great significance. Kaolin (KL), whose chemical formula is Al 4 [Si 4 O 10](OH) 8, is one of the clay minerals with hexagonal flaky structures. Due to the asymmetry between the silicon oxygen tetrahedron and aluminium oxygen octahedrons, the interlayer adhesion of kaolin is extremely strong.
Activated kaolin's potential adsorbents for the removal …
solution was prepared by dissolving accurately weighed amounts of dye (1 g/L) in distilled water and subsequently diluted to the required concentrations. The pH value of the initial dye …
Efficient Removal of Phosphate from Aqueous Solutions Using Kaolin
The removal of Pb(II) from aqueous solutions was investigated using kaolin with two different particle sizes (2.3 and 45 μm) with and without nanoscale zero-valent iron (nZVI, at a Fe content ...
Removal of Pb(II) ions from aqueous solutions using natural …
The effect of temperature on the removal of Pb(II) was studied through adsorbing 10 mg/L of Pb(II) solutions using kaolin and organokaolin, as well as 30 mg/L of Pb(II) solutions using bentonite and organobentonite at pH of 6, using 200 mg of the adsorbent at the equilibrium contact times reported in section 3.2.4. The temperature was varied ...
(PDF) Preparation, Characterization, and …
by the change in the pH value of the solution. In acidic. medium, the surface of the geopolymer is surrounded by H + ... methylene blue from aqueous solution by kaolin and zeolite," ...
Characterization, evaluation, and mechanism analysis of the
The adsorption capacity of K-CPC was significantly influenced by solution pH compared to the unadjusted pH solution (5.86), as shown in Fig. 6. Note that the experimental conditions for these experiments were 303 K, DCF initial concentration of 200 µg/L and 0.5 g/L of adsorbent dosage.
Thermodynamics and kinetics of the removal of methylene …
A B S T R A C T Removal of Methylene Blue () from aqueous solutions is studied using a raw Algerian kaolin sample as a low-cost adsorbent. The effects of pH, contact time, dye concentration and temperature are all taken into consideration.
CHARACTERIZATION OF KAOLIN DISPERSION USING …
Effects of concentration of solid, different kind of electrolytes (0.01 M KCl, 0.01 M MgCl2 and 0.01 M CaCl2), pH and temperature of the dispersions are investigated. The isoelectric points (IEP) …
Effect of Kaolin particle size on the removal of Pb(II) from …
The removal rates by all four kaolin samples increased with increasing pH in the range of 2–6, and with increasing temperature between 30 °C–60 °C. The results show that …
Effect of Kaolin particle size on the removal of Pb (II) from aqueous …
The removal of Pb(II) from aqueous solutions was investigated using kaolin with two different particle sizes (2.3 and 45 μm) with and without nanoscale zero-valent iron (nZVI, at a Fe content ...
Synthesis and characterization of Ethiopian kaolin for the …
The calculated values of ΔG0 for beneficiated adsorbent are -1.243, 1.576, and 4.396 kJ/mol at 303.15, 323.15, and 343.15 K, respectively for 20 mg/L of dye concentration …
Removal of Toxic Pollutants from Aqueous Solutions by …
The mass of phenol adsorbed onto the organo-kaolin was on average 18 times greater than that onto the natural kaolin. The value of the acid dissociation constant for phenol (pka = 9.96) indicates that phenol is protonated at pH values below 9.96 and deprotonated as the phenolate anion at pH values greater than 9.96 [12].
Fabrication of Kaolin Loaded Chitosan Hybrid Nanofibers for …
Palladium plays an important role in modern industry, agriculture and medicine. The direct discharge of palladium results in serious environmental pollution and loses of precious palladium metal. Herein, kaolin/chitosan hybrid nanofibers were successfully prepared to recover Pd2+ cations from aqueous solution. Chitosan and kaolin mixture was first electrospun into …
Effect of Kaolin particle size on the removal of Pb(II) from aqueous …
Figure 7 shows the Pb(II) removal efficiency in a 200 mg l −1 aqueous solution using the four kaolin samples at pH = 5 and 20 °C for 30 min. The removal rates of 2.3 μ m K-nZVI and 45 μ m K-nZVI reached 40.7% and 32.1%, respectively, while those of 2.3 μ m kaolin and 45 μ m kaolin were lower, being only 23.0% and 19.2%.
(PDF) Synthesis and characterization of Ethiopian kaolin for …
adsorbents will be zero [62]. pH values above the zero point of charge the raw as well as treated kaolin adsorbent will be negatively charged but positively charged below the zero points of charge. ... Z. Wen, W. Li, X. Wang, W. Wu, Equilibrium, kinetic and thermodynamic studies of adsorption of Th(IV) from aqueous solution onto kaolin, J ...