Highly efficient and selective removal of anionic dyes from aqueous solutions using magneto-responsive Fe-aminoclay/Fe2O3/polyvinyl alcohol composite microgels

Ultrathin Polymer Nanotubes Assembled from Side-Chain Amphiphilic Alternating Azocopolymers for the Potential of Highly-Efficient and Photo-Controllable Dye Removal

“…The facile synthesis imparts UTPNTs with a large number of positively charged surfaces, which is beneficial for the fast encapsulation of guest molecules. Figure f and Table S2 display the comparison in the adsorption performance of UTPNTs with other recently reported adsorbents, demonstrating a preferable adsorption capacity of UTPNTs toward anionic dye CR and the potential of UTPNTs on wastewater treatment and environmental remediation. − …”

“…In comparison, the adsorption constant for tubular absorbents of UTPNTs (7.79 × 10 –4 g mg –1 ) was smaller than that of the spherical absorbent of UTPVs (1.55 × 10 –3 g mg –1 ), proving the preferable adsorption activity of UTPNTs. Both large adsorption amounts and fast adsorption rates suggested the adsorption superiority of microscale UTPNTs, attributable to the large specific surface area and the siphonage effect of high-aspect-ratio tubular nanostructures. ,− Therefore, the distinct adsorption parameters (i.e., adsorption amounts, equilibrium time) for different hollow nanoarchitectures proved the photocontrollable adsorption performance toward anionic pollutants.…”

Electrospray Preparation of Robust Aramid Nanofiber Microbead Adsorbents for Wastewater Treatment

“…The reusability of the adsorbent is a practical factor in evaluating adsorbents, and adsorbents with good reusability are of great use in practical applications. ,− Figure a illustrates that the cyclic adsorption efficiency of the ANF microbeads for MB increased with higher pH values. For instance, at pH = 12, the adsorption–desorption cycles consistently maintain a removal efficiency of 95.4%.…”

Porous Adsorbents Cross-Linked with Waste Polystyrene Foam and 3,3′,4,4′-Biphenyltetracarboxylic Acid Dianhydride for the Effective Removal and Enrichment of Cationic Dyes

“…The selective adsorption ability of HPB-2 was attributed to electrostatic gravitational forces between the rich carboxyl functional groups on the adsorbent surface and cationic dyes, with electrostatic repulsive forces between anionic dyes, as shown in Figure S7. 55 Above all, the adsorbent HPB-2 showed relatively excellent adsorption for mixed dyes, especially for the selective separation of mixed anionic and cationic dyes, which found significant application prospects.…”