Back to Search
Start Over
Amine-Cross-Linked Lignin-Based Polymer: Modification, Characterization, and Flocculating Performance in Humic Acid Coagulation
- Source :
- ACS Sustainable Chemistry & Engineering. 3:3253-3261
- Publication Year :
- 2015
- Publisher :
- American Chemical Society (ACS), 2015.
-
Abstract
- In this study, a lignin-based flocculant (LNF) was synthesized by grafting amine groups into alkali lignin containing papermaking sludge. Characterization of LNF, such as FTIR, zeta potential, cationic degree, viscosity, and molecular weight, showed that the product was a cationic polymer with high solubility. LNF was used with aluminum sulfate (AS) and polyaluminum chloride (PAC) in humic acid coagulation to demonstrate its efficiency. Coagulation behavior and floc properties of LNF+PAC and LNF+AS dual-coagulant were comparatively evaluated. Results showed that the coagulation aid effect of LNF was independent of aluminum species. Addition of LNF could enhance humic acid removal efficiency and floc properties including size, strength, and fractal dimension significantly. The effect of solution pH on coagulation processes was also studied. Dual-coagulants showed the same variation trend as that of aluminum-based coagulants but enhanced coagulation performance during the investigative pH range. Flocs forme...
- Subjects :
- chemistry.chemical_classification
Flocculation
Renewable Energy, Sustainability and the Environment
Chemistry
General Chemical Engineering
Cationic polymerization
General Chemistry
Polymer
complex mixtures
chemistry.chemical_compound
Chemical engineering
Zeta potential
Environmental Chemistry
Organic chemistry
Coagulation (water treatment)
Humic acid
Lignin
Solubility
Subjects
Details
- ISSN :
- 21680485
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- ACS Sustainable Chemistry & Engineering
- Accession number :
- edsair.doi...........0d9d263d523a2fad854bd3324cdcc1f1