Preparation and Flocculation Property of Cationic Chitosan‐DADMAC‐β‐Cyclodextrin Copolymer

• Published in: Starch Vol. 73; no. 7-8
• Main Authors: Zhang, Jia, Guan, Guohao, Lou, Tao, Wang, Xuejun
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.07.2021
• Subjects: Ammonium; Ammonium chloride; Biodegradability; Biodegradation; Chitosan; Color removal; Copolymerization; Copolymers; Cyclodextrins; Dyes; Flocculants; Flocculation; Functional groups; Industrial wastewater; microwave; Wastewater treatment; β-Cyclodextrin
• ISSN: 0038-9056; 1521-379X
• DOI: 10.1002/star.202100047

Dye wastewater, especially anionic dye wastewater, poses a serious risk to the environment and human health. To solve this problem, it is necessary to develop new flocculants with high efficiency and biodegradability. Herein, a copolymer of chitosan‐diallyl dimethyl ammonium chloride‐β‐cyclodextrin (CDC) with multiple functional groups is synthesized by microwave‐assisted copolymerization and used as flocculation to remove anionic dyes from wastewater. The experimental data show that the best removal ratios of the prepared CDC can reach 99.8% and 98.9% for acid black 172 and reactive orange C‐3R, respectively. In addition, the CDC can maintain good removal ability at different pH, temperature, and dye concentration. The excellent flocculation ability and wide application range endow the CDC flocculant with the potential application of anionic dye wastewater treatment. A ternary polymer of chitosan‐diallyl dimethyl ammonium chloride‐β‐cyclodextrin is synthesized by a microwave‐assisted copolymerization technique and is used to flocculate anionic dyes. The color removal ratios towards acid black 172 and reactive orange C‐3R are as high as 99.8% and 98.9, respectively. The excellent flocculation performance and wide application range endow this flocculant with potential applications in the field of wastewater treatment.