Influence of the ionic strength on the adsorption properties of the system dispersed aluminium oxide–polyacrylic acid

Chibowski, S.; Mazur, E. Opala; Patkowski, J.

doi:10.1016/j.matchemphys.2005.02.038

Cited by 44 publications

(27 citation statements)

References 17 publications

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“…The obtained results indicate that the presence of CMC and surfactants causes the decrease of the zeta potential as well as a shift of isoelectric point (pH iep ) from MnO 2 towards lower pH values (pH iep for MnO 2 % 4 (Chibowski et al 2008)). The last fact is the evidence that carboxymethylcellulose adsorption has a specific, nonelectrostatic character (Chibowski et al 2005). The zeta potential values of MnO 2 are the highest in pure electrolyte solution (0.01 mol dm -3 NaCl- Fig.…”

Section: Resultsmentioning

confidence: 96%

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Grządka

Chibowski

2011

Cellulose

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The adsorption of carboxymethylcellulose (CMC) in the presence of the surfactants: anionic SDS, nonionic polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether (Triton X-100) and their mixtures SDS/polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether with different molar ratios (1:1; 1:3 and 3:1) from the electrolyte solutions (NaCl, CaCl 2 ) on the manganese dioxide surface (MnO 2 ) was studied. In every measured system the increase of CMC adsorption in the presence of surfactants was observed. This increase was the smallest in the presence of SDS, a bit larger in the presence of polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether and the largest when the mixtures of SDS/polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether were used. Among the measured mixtures, the mixture of SDS/polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether with the molar ratio 1:3 caused the largest increase of CMC adsorption amount. These results are a consequence of formation of complexes between the carboxymethylcellulose macromolecules and the surfactant molecules. In order to determine the electrokinetic properties of the system the surface charge density of MnO 2 and the zeta potential measurements were conducted in the presence of the CMC macromolecules and the surfactants. The obtained data showed that the adsorption of CMC or CMC/surfactants complexes on the manganese dioxide surface strongly influences the structure of the electric double layer MnO 2 /electrolyte solution.

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Section: Resultsmentioning

confidence: 96%

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Grządka

Chibowski

2011

Cellulose

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“…Aluminum oxide is one of the most widely used adsorbents, as it does not swell and has good mechanical strength, small solubility and stability in a broad pH range [34]. Immobilization of organic compounds on the surface of the solid support is usually aimed at modifying the surface with certain target functional groups for a higher selectivity of the extraction.…”

Section: Introductionmentioning

confidence: 99%

Removal of nickel(II) and palladium(II) from surface waters

Sabermahani¹,

Saeidi²,

Sharifzade³

2012

Bull. Chem. Soc. Eth.

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ABSTRACT. A new sorbent was prepared using alumina and 5-Br-PADAP, and its adsorption ability for the removal of Ni(II) and Pd(II) from different waters was investigated. The procedure is based on retention of the analytes on the alumina load with 5-Br-PADAP at pH ~ 6. The separation/preconcentration conditions for the quantitative recoveries were investigated. The limit of detections (LOD) based on three times the standard deviations of the blank, were 0.187 and 0.253 ng mL -1 for Ni(II) and Pd(II), respectively. Obtained sorption capacities for 1 g sorbent were 6.0 mg Ni(II) and 11.0 mg Pd(II). The linearity was maintained in the concentration range of 0.625 to 6.0 ng mL -1 for Ni(II) and 0.416 to 7.0 ng mL -1 for Pd(II) in the original solution. Eight replicate determinations of a mixture containing 2.0 µg mL -1 each of the elements in the final solution gave relative standard deviation of ±0.82 and ±1.12% for Ni(II) and Pd(II), respectively. The proposed method was successfully applied to the determination trace amounts of Ni(II) and Pd(II) in the surface water samples.

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“…[12][13][14][15][16][17] Besides, other types of dispersants have also been disclosed. For example, Baklouti et al 18 have prepared a sulfonic copolymer and determined the optimum conditions of the polymer to ensure stable alumina suspensions.…”

Section: Introductionmentioning

confidence: 99%

Effect of molecular weight of an anionic dispersant on the properties of BaTi₄O₉ slurries

Chung

Hsu

2011

J of Applied Polymer Sci

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The colloidal stability of BaTi 4 O 9 (BT 4 ) aqueous suspensions with poly(acrylamide-co-4-carboxylamino-4-oxo-2-butenate) (PAC) of different molecular weights at pH 9 has been investigated by means of zeta potential, adsorption, sedimentation, and particle size measurements. The results indicate that PAC could improve the dispersion of the particles from agglomeration. The resulting suspensions became more stabilized, and contained powder with smaller particle size. Consequently, the compacts with PAC exhibited better properties in terms of density and dielectric constant than those without any polymer present. The performance of PAC increased with decreasing polymer molecular weight. Clearly, PAC1 (M w ¼ 1.8 Â 10 4 ) was most effective in dispersing the BT 4 particles, and stabilizing the ceramic suspensions. This is attributed to the highest adsorption of this polymer onto BT 4 powder, and causes strongest electrostatic repulsions among solid particles.

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Influence of the ionic strength on the adsorption properties of the system dispersed aluminium oxide–polyacrylic acid

Cited by 44 publications

References 17 publications

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Removal of nickel(II) and palladium(II) from surface waters

Effect of molecular weight of an anionic dispersant on the properties of BaTi₄O₉ slurries

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Influence of the ionic strength on the adsorption properties of the system dispersed aluminium oxide–polyacrylic acid

Cited by 44 publications

References 17 publications

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Removal of nickel(II) and palladium(II) from surface waters

Effect of molecular weight of an anionic dispersant on the properties of BaTi4O9 slurries

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Product

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Effect of molecular weight of an anionic dispersant on the properties of BaTi₄O₉ slurries