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Synthesis of lignosulfonate‐acrylamide‐dimethyldiallylammonium chloride copolymer and its flocculation performance
Author(s) -
Zhang Weixing,
Wang Xuejun,
Xu Qing,
Peng Jing,
Lou Tao
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48560
Subject(s) - flocculation , monomer , copolymer , chloride , acrylamide , polymerization , wastewater , nuclear chemistry , polyacrylamide , chemistry , chemical engineering , polymer , materials science , polymer chemistry , organic chemistry , waste management , engineering
In this work, lignosulfonate‐acrylamide‐dimethyldiallylammonium chloride (LAD) terpolymer was designed and synthesized by microwave‐assisted graft polymerization. The optimal synthetic process was obtained as follows: the monomer ratio was 1:4:4, the amount of initiator was 0.9% (w/w), the monomer solid content was 21 wt %, and the reaction time was 14 min with the microwave power of 280 W. Furthermore, the flocculation performance of LAD was verified by removing acid black‐172 dye wastewater. At the LAD dosage of 350 mg L −1 , the maximum color removal ratio reached 99.8% in 100 mg L −1 of dye wastewater. The dynamics of dye removal reached higher than 90% after 20 s. The flocculant can maintain color removal ratio more than 98% in a wide flocculant dosage and environmental pH. The flocculation mechanism was mainly electrical neutralization and bridging effect. In general, it is a promising candidate in wastewater treatment in terms of cost, synthetic method, and effectiveness. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48560.