Stimuli-Responsive Hybrid Polymer for Enhanced SolidLiquid Separation of Industrial Effluents [component]

11 In the current study, a novel stimuli-responsive hybrid polymer with aluminium hydroxide colloids 12 incorporated into a cationic copolymer of N-isopropylacrylamide and N-[3-13 (dimethylamino)propyl] methacrylamide was synthesized to enhance the settling and filtration 14 performance of fine clay suspensions. The conformation of the synthesized hybrid copolymer was 15 shown to respond to changes in both temperature and pH. Compared with a cationic copolymer of 16 similar structure without
more » ... minium hydroxide colloids, settling and filtration rates were 17 significantly enhanced using the hybrid copolymer, which is attributed to the synergy between the 18 inorganic aluminium hydroxide cores and organic copolymer. While the ideal treatment protocol 19 for the hybrid polymer involved the addition of the polymer at room temperature, followed by 20 heating to 45°C for enhanced settling and dewatering, the synergistic effect between colloidal 21 2 cores and polymer also allowed the hybrid polymer to perform well when added at temperatures 22 above the LCST, demonstrating the robustness of the hybrid polymer to the process environment. 23 The ideal treatment protocol resulted in optimal polymer-clay adsorption before inducing a coil-24 globule transition to form large and dense flocs, resulting in a porous filter cake. 25 26 Abstract Art 27 28 29 30
doi:10.1021/acs.est.8b07074.s001 fatcat:42pzstx4ibaozl4apjm45gnjnq