A new fast swelling poly[DAPB-co-DMAAm-co-AASS] superabsorbent hydrogel for removal of anionic dyes from water

A holistic review of hydrogel applications in the adsorptive removal of aqueous pollutants: Recent progress, challenges, and perspectives

Due to the unique physical and chemical characteristics of hydrogels, such as hydrophilicity, swellability, and modifiability, there is increasing research interest in the development and application of novel hydrogels in water and wastewater treatment. Hydrogels have exhibited superior performance in the adsorptive removal of a wide range of aqueous pollutants including heavy metals, nutrients, and toxic dyes. However, there remain certain challenges which need to be addressed in order to evolve hydrogel based treatment systems from the lab-scale to practical applications. This review provides a coverage of the latest developments in the application of hydrogels for the adsorptive removal of aqueous pollutants. A holistic overview of different steps involved in the hydrogel based treatment systems is provided, and the influencing factors and mechanisms of pollutants removal are reviewed. Major challenges pertaining to adsorption kinetics, operational pH range, interference, and hydrogel recovery are examined. Important considerations such as stability and reusability of hydrogels and resource recovery are also discussed, for economic and sustainability concerns.

A novel approach for the synthesis of hydrogel nanoparticles and a removal study of reactive dyes from industrial effluent

A novel amphoteric monomer, N,N-diallyl carboxypiperidinium bromide (DACPB), has been synthesized by the stepwise condensation of isonipecotic acid to an ester and then with allyl chloride and allyl bromide.

Preparation and dye removal capacities of porous silver nanoparticle-containing composite hydrogels via poly(acrylic acid) and silver ions

Hierarchical composite hydrogels (PAA–Ag/AgNPs) are prepared via a simple self-assembly process and coordination reaction, and demonstrate good catalytic capability for wide applications.

Synthesis of a Gum rosin alcohol-poly(acrylamide) based adsorbent and its application in removal of malachite green dye from waste water

The present paper is focused on the synthesis of a green GrA-cl-poly(AAm) adsorbent using N,N′-methylene-bis-acrylamide and potassium persulphate as a crosslinker–initiator system.