Mehtab Nusrullah, Bin Lu, Guilan Miao, Amna Bibi, Yanmei Wang
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The Study of Acrylamide/(N-Hydroxyethyl)acrylamide Copolymer as a Flocculant for Kaolin Suspensions
Acrylamide-based non-ionic polymers have gained significant attention for wastewater treatment due to their high flocculation efficiency. However, optimizing the polymer dosage and knowing the role of hydrogen bonding in flocculation remain challenging. In this study, acrylamide/(N-hydroxyethyl)acrylamide (AM/HEA) copolymers at different molar ratios were synthesized via solution polymerization. The polymers were characterized using FTIR, 1H NMR, DSC, and TGA. The kaolin suspension was employed to evaluate the flocculation performance of copolymers by the jar test method. The AM/HEA copolymers showed superior flocculation efficiency, achieving 98% turbidity removal at an optimal polymer flocculant dose of 0.2 mg/L, with a stirring speed of 400 rpm and a stirring time of 180 s. Zeta potential and TEM imaging results showed that flocculation primarily occurred through polymer adsorption on the kaolin surface, with its coiled conformation may enhance particle bridging. These results emphasize the critical role of polymer molecular structure in optimizing flocculation performance and suggest AM/HEA copolymers as efficient flocculants for water treatment exercises.
期刊介绍：
The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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