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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.
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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 …
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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.
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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 ...
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The effects of solutio n pH value on the adsor ption of phosph ate from aqueous solution, using mag netic kaolin com posite were invest igated and the resu lts are presented in Figure 12 .
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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 ...
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ing the kaolin to nZVI mass ratio, the solution's ini-tial pH, the amount of K-nZVI, the initial phosphate concentration and various anions on the phosphate removal by K-nZVI were investigated. The optimum K-nZVI amount and initial pH at the initial phosphate concentration of 16 mg P/L were 0.5 g/L and pH 3,
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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 …
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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 ...
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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).
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This study utilised a natural adsorbent, kaolin clay to remove pollutants' dye (Methylene Blue) from aqueous solutions. Batch studies were conducted to evaluate the adsorption efficiency for …
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2005. The estimated maximum adsorption (M, mg/g) generally decreases with increasing pH for both Zn and Mn in single metal solution system. The influence of SSR is appreciable at pH of 2.5 with >20% reduction in adsorption capacity for Zn and Mn under both single and binary systems while increase in Ci usually resulted in about 10-15% reduction in adsorption capacity at pH of …
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The Algerian kaolin clay was investigated to remove Zn(II) heavy metal ion from aqueous solution. The effect of contact time, initial metal ion concentration, pH and temperature was experimentally ...
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High adsorption was observed in the pH range of 5.5–7.5 and low adsorption was achieved at higher pH values (higher than 8). In this pH range the non-ionic H 3 AsO 3 is the dominant species, and van der waal force between the solute and the synthesized nano γ–alumina surface is expected. A further experiment was conducted to get the ...
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Removal of Methylene Blue Dye from Aqueous Solution Using Kaolin Removal of Methylene Blue Dye from Aqueous Solution Using Kaolin ... (no initial adjustment of the pH-value was performed ...
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Solution salinity is critical for the inhibition effect of sodium hexametaphosphate on different mineral surfaces, further affecting the separation of minerals in aqueous solution.
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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
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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 ...
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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 …
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A comparative study of acidic, basic, and reactive dyes adsorption from aqueous solution onto kaolin adsorbent: Effect of operating parameters, isotherms, kinetics, and thermodynamics. ... The dye solutions pH values were adjusted with 1 M NaOH/HCl solutions. The basic operating parameters of the adsorption experiments were optimized with ...
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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 ...
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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 …
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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 ...
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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.
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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 …
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Accepted Manuscript Removal of chromium(VI) and zinc(II) from aqueous solution using kaolin-supported bacterial biofilms of Gram-negative E. coli and Gram-positive Staphylococcus epidermidis Khyle Glainmer Quiton, Bonifacio Doma, Jr., Cybelle M. Futalan, Meng-Wei Wan PII: S2468-2039(17)30298-4 DOI: 10.1016/j.serj.2018.04.002 Reference: SERJ 127 To appear in: …
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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 ...
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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 ...
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The calculated values of Δ G 0 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 and solution pH of 9 ...
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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 …
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