Polyphenol rich green tea waste hydrogel for removal of copper and chromium ions from aqueous solution

In this study, green tea waste (GTW) was used to synthesize the iron oxide (IO) nanoparticles ([email protected]) to facilitate the adsorption of heavy metals from wastewaters. To satisfy structural integrity needs, the synthesized [email protected] was incorporated into a polyvinyl alcohol (PVA)/alginate polymer network to obtain PVA/alginate/IO (PAI) hydrogels. Experimental techniques of transmission electron microscopy (TEM), dynamic light...