Homologous–heterogeneous structure control and intelligent adsorption effect of a polycationic gel for super-efficient purification of dyeing wastewater

Abstract

A homologous–heterogeneous polycationic gel (HPCG) system was constructed by a waste-free synthesis process, to be used as a super-efficient adsorbent material for purifying dyeing wastewater.

A facilely synthesized polyanionic gel adsorbent with high adaptability and new adsorption effects for purification of Cu(II)‐containing wastewater

“…Triallylmethylammonium chloride (TAMAC) was prepared by the quaternization reaction of methylene bisacrylamide (MBA) and allyl chloride using dry acetone as solvent at 35 °C for 48 h according to our previous studies . Acrylic acid (AA, industrial purity) was purchased from Shandong Qilu Chemical Co., Ltd (Zibo City, China).…”

“…We observed that the obtained polycationic adsorbents had strong adsorption abilities to remove anionic pollutants (e.g. anionic colored dyes) in water, and their adsorption capacities were 17.4–292.2 times higher than that of the widely used activated carbon, owing to the formation of strong electrostatic adsorption interactions between the polycationic units and the anionic dyes . Based on the same interaction principle, we deduced that if some useful anionic units could be incorporated into material skeletons, the corresponding anionic adsorbents would be obtained.…”

Superefficient removal of lignins from papermaking wastewater by polycationic adsorption and direct reuse of wastes: structure–activity relationships and interaction mechanisms

“…According to the optimized synthesis conditions previously reported, 35,36 PT-cotton and PTAMAC gel were simultaneously prepared in a one-pot polymerization system of G-cotton and triallylmethyl ammonium chloride (TAMAC) at 60°C for 4.0 h, as shown in Scheme 5.…”

“…All of these materials had 17.4-605.5 times higher adsorption capacities than the existing activated carbon adsorbent. [32][33][34][35][36] These previous successes encouraged us to further study these new polycationic adsorbents to realize the efficient removal of lignins in papermaking wastewater.…”

A ZnO@ABS/TPU/CaSiO3 3D skeleton and its adsorption/photocatalysis properties for dye contaminant removal

“…The rst part was external surface adsorption, because of the high initial RhB concentration and large number of active adsorption sites. In the second part, until the equilibrium stage, the decreased adsorption rate determined the slow adsorption process and the intraparticle diffusion was further slowed down because of the decreased residual RhB concentration in the solution 37 (Fig. S2 †).…”