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Cationic starch-grafted-cationic polyacrylamide based graphene oxide ternary composite flocculant for the enhanced flocculation of oil sludge suspension.
- Source :
-
Composites: Part B, Engineering . Nov2019, Vol. 177, pN.PAG-N.PAG. 1p. - Publication Year :
- 2019
-
Abstract
- In this study, a novel, highly efficient and environmentally friendly ternary composites flocculant, namely, cationic starch-grafted-cationic polyacrylamide/graphene oxide (CS-g-CPAM/GO), was synthesized by ammonium persulfate initiation polymerization and condensation reaction. First, CS-g-CPAM was polymerized with cationic starch (CS), acrylamide (AM) and diallyl dimethyl ammonium chloride (DMDAAC), and CS-g-CPAM/GO was then synthesized by condensation reaction. The influence factors of graft polymerization were investigated, including total monomer concentration, initiator dosage, monomer mass ratio of m AM : m CS : m DMDAAC , post-polymerization temperature and post-polymerization time. The chemical structures and morphologies of the samples were characterized by Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermo-gravimetric and differential scanning calorimetry (TG-DSC), and scanning electron microscope (SEM). The CS-g-CPAM/GO was used to flocculate the oil sludge suspension, the effects of CS-g-CPAM/GO dosage, temperature and pH value on the flocculation performance were investigated, and the flocculation mechanism of CS-g-CPAM/GO was also analyzed. The results show that CS-g-CPAM/GO has outstanding flocculation effect, and CS-g-CPAM/GO flocculates oil sludge particles by adsorption bridging and charge neutralization in acidic and alkaline conditions. Image 1 • Novel CS-g-CPAM/GO flocculants were synthesized. • Chemical structures were characterized and analyzed. • Flocculation mechanism were summarized. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13598368
- Volume :
- 177
- Database :
- Academic Search Index
- Journal :
- Composites: Part B, Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 141613035
- Full Text :
- https://doi.org/10.1016/j.compositesb.2019.107416