Versatile nanostructured <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mtext>SiO</mml:mtext> <mml:mn>2</mml:mn> </mml:msub></mml:math>/cross-linked polyelectrolyte composites for emerging pollutants removal from aqueous media

Linear and branched poly(ethyleneimines) poly(acrylic acid) have been used in the construction of nanostructured thin multilayer organic shell onto silica microparticles. After glutaraldehyde selective crosslinking part amino groups, polyanionic chains were removed on strong basic media. The core/shell microparticles, with groups active sites, could interact anionic charged species dissolved aqueous Batch/column experiments show that polyanion extracted composites present best performance toward gallic acid sorption (∼30 mg/g composite), as compared to non-extracted samples (∼6 mg/g). multiple sorption/desorption studies demonstrated reusability for water/wastewater treatment applications at least 10 consecutive cycles without significant loss capacity.