Interactions in Calcium Oxalate Hydrate/Surfactant Systems

Sikirić, Maja Dutour; Filipović-Vinceković, Nada; Babić-Ivančić, Vesna; Vdović, Neda; Füredi-Milhofer, Helga

doi:10.1006/jcis.1998.6044

Cited by 25 publications

(21 citation statements)

References 25 publications

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“…The application of surfactants can also produce environmental pollution and raises a series of problems for wastewater treatment plants [2]. Furthermore, surfactants adsorb readily onto crystal surfaces, owing to their surface activity, leading to crystal growth inhibition [3][4][5]. From this perspective, surfactants should be removed from selected stages of industrial processes or wastewater treatment systems.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamics and mechanism of cetyltrimethylammonium adsorption onto clayey soil from aqueous solutions

Gürses

Karaca

Açıkyıldız

et al. 2009

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

“…Additionally, several materials have been investigated as surfactant adsorbents. These include layered double hydroxides [7,8], zeolites [7], activated carbons [9], silica [10], alumina [5,7,8,[11][12][13], polymers [14], and natural and synthetic fibers [15].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and mechanism of cetyltrimethylammonium adsorption onto clayey soil from aqueous solutions

Gürses

Karaca

Açıkyıldız

et al. 2009

Chemical Engineering Journal

View full text Add to dashboard Cite

“…The application of surfactants can also produce environmental pollution and raises a series of problems for wastewater treatment plants (3). Furthermore, surfactants adsorb readily on crystal surfaces owing to their surface activity, leading to crystal growth inhibition (4)(5)(6). From this perspective, surfactants should be removed from selected stages of the industrial process or wastewater emission systems.…”

Section: Introductionmentioning

confidence: 99%

“…It is well-known that the surface charge of an AC is pH dependent, which will affect the mechanism of surfactant adsorption (31). The study of surfactant adsorption based on an electrostatics interaction mechanism has been well developed (1,2,6,32,33). However, few studies include anionic surfactant adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, several materials have been investigated as surfactant adsorbents. These include layered double hydroxides (1,7), zeolites (7,8), silica (9), mineral oxides (alumina) (1,6,7,(10)(11)(12), polymers (13), natural and synthetic fibers (14), and activated carbons (ACs) (8). Different adsorption mechanisms and models have been proposed, depending on the adsorbent-adsorbate system.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Anionic Surfactant by Activated Carbon: Effect of Surface Chemistry, Ionic Strength, and Hydrophobicity

Pendleton

2001

Journal of Colloid and Interface Science

162

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Cooperation of phosphates and carboxylates controls calcium oxalate crystallization in ultrafiltered urine

et al. 2011

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Osteopontin (OPN) is one of a group of proteins found in urine that are believed to limit the formation of kidney stones. In the present study, we investigate the roles of phosphate and carboxylate groups in the OPN-mediated modulation of calcium oxalate (CaOx), the principal mineral phase found in kidney stones. To this end, crystallization was induced by addition of CaOx solution to ultrafiltered human urine containing either human kidney OPN (kOPN; 7 consecutive carboxylates, 8 phosphates) or synthesized peptides corresponding to residues 65-80 (pSHDHMDDDDDDDDDGD; pOPAR) or 220-235 (pSHEpSTEQSDAIDpSAEK; P3) of rat bone OPN. Sequence 65-80 was also synthesized without the phosphate group (OPAR). Effects on calcium oxalate monohydrate (COM) and dihydrate (COD) formation were studied by scanning electron microscopy. We found that controls form large, partly intergrown COM platelets; COD was never observed. Adding any of the polyelectrolytes was sufficient to prevent intergrowth of COM platelets entirely, inhibiting formation of these platelets strongly, and inducing formation of the COD phase. Strongest effects on COM formation were found for pOPAR and OPAR followed by kOPN and then P3, showing that acidity and hydrophilicity are crucial in polyelectrolyte-affected COM crystallization. At higher concentrations, OPAR also inhibited COD formation, while P3, kOPN and, in particular, pOPAR promoted COD, a difference explainable by the variations of carboxylate and phosphate groups present in the molecules. Thus, we conclude that carboxylate groups play a primary role in inhibiting COM formation, but phosphate and carboxylate groups are both important in initiating and promoting COD formation.

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Interactions in Calcium Oxalate Hydrate/Surfactant Systems

Cited by 25 publications

References 25 publications

Thermodynamics and mechanism of cetyltrimethylammonium adsorption onto clayey soil from aqueous solutions

Thermodynamics and mechanism of cetyltrimethylammonium adsorption onto clayey soil from aqueous solutions

Adsorption of Anionic Surfactant by Activated Carbon: Effect of Surface Chemistry, Ionic Strength, and Hydrophobicity

Cooperation of phosphates and carboxylates controls calcium oxalate crystallization in ultrafiltered urine

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