Use of nanoparticular and soluble anionic celluloses in coagulation-flocculation treatment of kaolin suspension

Water Research
Henrikki LiimatainenJouko Niinimäki

Abstract

In this work, the effectiveness of a novel, combined coagulation-flocculation treatment based on alum and soluble or nanoparticular anionic derivatives of dialdehyde cellulose, ADAC, was evaluated by studying the removal of colloidal material in a model suspension containing kaolin. Four different ADACs with varying degrees of substitution, size and water solubility were synthesized by periodate oxidation and sulfonation of cellulose. The effects of ADAC dosage, solution pH and temperature on flocculation were studied by measuring residual turbidity of the settled suspension. Moreover, the charge densities, sizes, ζ-potentials and stability of the ADACs in aqueous solutions were studied. The combined treatment was effective in the removal of colloidal particles, as demonstrated by reduced residual turbidity with remarkably lower total chemical consumption compared with coagulation with alum alone. Of the ADACs, samples with lower solubility that contained cellulose nanoparticles performed better than the fully water-soluble sample. Due to the restricted pH tolerance of alum, the combined treatment was effective only at acidic conditions (pH < 5), although the ADACs were found to be stable in a much broader pH range (pH of 3 to ...Continue Reading

References

Feb 12, 2004·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·C Rudén
Aug 25, 2011·Bioresource Technology·Henrikki LiimatainenJouko Niinimäki

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Citations

Jun 20, 2014·Environmental Science and Pollution Research International·Liyuan ChaiQingwei Wang
Oct 3, 2015·Carbohydrate Polymers·Luminita Ghimici, Marieta Nichifor
Aug 5, 2014·ACS Applied Materials & Interfaces·Juho Antti SirviöOsmo E O Hormi
Aug 29, 2018·Small·Kaitao Zhang, Henrikki Liimatainen
Sep 28, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Kinga GrendaMaria G Rasteiro
Oct 23, 2018·Beilstein Journal of Nanotechnology·Katrina Pui Yee ShakShee Keat Mah
Nov 10, 2020·ACS Applied Materials & Interfaces·Kudzanai NyamayaroParisa Mehrkhodavandi

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