Novel biodegradable flocculanting agents based on cationic amphiphilic polysaccharides

Bioresource Technology
Luminita Ghimici, Marieta Nichifor

Abstract

Flocculation properties of a series of cationic polysaccharides, with N-alkyl-N,N-dimethyl-N-(2-hydroxypropyl)ammonium chloride pendent groups attached to a dextran backbone, were evaluated in clay dispersions with respect to length of the alkyl substituent, molar mass, the charge density, and polycation dose. According to turbidimetric results, the alkyl chain length greatly influenced the optimum polymer dose as well as the width of the flocculation window since both increased from an ethyl to a butyl group and decreased for when octyl or dodecyl group was present. The residual turbidity values also varied with the charge density but no dramatic effect was observed with the molar masses investigated. These findings together with the negative value of the zeta potential at the optimum polymer dose and floc size measurements, point to contributions from both patch and bridging mechanisms for the flocculation process.

References

Apr 6, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Jörg KleimannMichal Borkovec
Apr 28, 2007·Water Research·Brian Bolto, John Gregory
May 1, 2007·The Journal of Physical Chemistry. B·Graeme GilliesMichal Borkovec
Jul 5, 2007·The Journal of Physical Chemistry. B·S SchwarzJ Bohrisch

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Citations

Dec 24, 2011·Applied Biochemistry and Biotechnology·George J PiazzaRafael A Garcia
Apr 4, 2015·Carbohydrate Polymers·Shoujuan WangPedram Fatehi
Jun 28, 2011·Journal of Hazardous Materials·Luminita Ghimici, Marieta Constantin
Oct 3, 2015·Carbohydrate Polymers·Luminita Ghimici, Marieta Nichifor
Aug 31, 2013·Carbohydrate Polymers·George F FantaFrederick C Felker
Sep 24, 2013·Carbohydrate Polymers·Luminita Ghimici, Marieta Nichifor
Nov 15, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Danfeng YuJinben Wang
Oct 19, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Hui YangJinben Wang
Jul 28, 2016·Applied Biochemistry and Biotechnology·Chengrong PengDunhai Li

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