مقاله Flocculation by cationic amphiphilic polyelectrolyte: Relating efficiency with the association of polyelectrolyte in the initial solution : تی پی بین

خلاصه مقاله

Flocculation ability of an amphiphilic cationic polysaccharide with N-octyl-N,N-dimethyl-N-(2-hydroxypropyl)ammonium chloride groups attached to a dextran backbone, was evaluated in clay dispersions with respect to polycation dose and initial solution concentration and, consequently, its association state. According to turbidimetric results, the concentration of initial solution of polymer influenced, mainly, the width of the flocculation window (the polycation dose range where the minimum of the residual turbidity was obtained) since this flocculation characteristic increased with increasing this parameter. A significant change in flocculation performances was noticed when polymer concentration was above its critical aggregation concentration. Possible reasons for this dependence are discussed. The negative value of the zeta potential in the whole flocculation window and the floc size distribution point to contributions from both patch/charge neutralization and bridging mechanisms for the flocculation process.

نویسندگان

Luminita Ghimici [ “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda, 41A, 700487 Iasi, Romania ]

Marieta Nichifor [ “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda, 41A, 700487 Iasi, Romania ]

کلمات کلیدی

Amphiphilic polysaccharide Flocculation Polymer concentration Turbidity Zeta potential

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Colloids and Surfaces A: Physicochemical and Engineering Aspects

Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications ofcolloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.Criteria for publication in Colloids and Surfaces A are novelty, quality and current interest. Manuscripts which only make routine use of or minor extensions to well established methodologies (e.g. fitting adsorption data to a Langmuir or Freundlich isotherm) are no appropriate for the journal.

حوزه های تحت پوشش : Physicochemical , food, energy, minerals processing, pharmaceuticals , environment