| Title |
A novel way to obtain effective cationic starch flocculants |
| Authors |
Lekniute-Kyzike, Edita ; Bendoraitiene, Joana ; Danilovas, Paulius Pavelas ; Zemaitaitis, Algirdas |
| DOI |
10.1080/19443994.2016.1138892 |
| Full Text |
|
| Is Part of |
Desalination and water treatment.. Philadelphia, PA : Taylor & Francis. 2016, vol. 57, iss. 50, p. 23728-23738.. ISSN 1944-3994. eISSN 1944-3986 |
| Keywords [eng] |
cationic starch ; mechanical shearing ; flocculation ; kaolin suspension ; flocculation mechanism |
| Abstract [eng] |
A novel way to obtain an effective flocculant based on biodegradable starch was found. The medium-substituted (DS from 0.10 to 0.54) cationic starches (CS) with preserved microgranular form was synthesised by the reaction of potato starch with 2,3-epoxypropyltrimethylammonium chloride using the semi-dry process. The cationic starch derivatives were characterised by Fourier Transform infrared spectroscopy, X-ray diffraction and 1H-NMR, and their pasting and swelling properties were investigated. High-performance flocculant was obtained using intense mechanical shearing of aqueous cationic starch slurry. Swollen CS microgranules were crushed by the applied mechanical shearing and low-viscosity, stable CS aqueous dispersions were prepared. Sheared CS have a higher accessibility to polyanions, a lower molecular weight and a markedly higher flocculation efficiency—a lower minimum dose, while maintaining wide flocculation window. The flocculation mechanism of the kaolin suspension by sheared CS was proposed. |
| Published |
Philadelphia, PA : Taylor & Francis |
| Type |
Journal article |
| Language |
English |
| Publication date |
2016 |
| CC license |
|
