Adsorptive removal of phenol by single and double network composite hydrogels based on hydroxypropyl cellulose and graphene oxide

摘要: Composite hydrogels based on hydroxypropyl cellulose (HPC) and graphene oxide (GO) were developed used for adsorption of phenol. The single network composite hydrogel (SNCH) was first prepared by crosslinking HPC GO epichlorohydrin; then the SNCH treated with polyethyleneimine solution, forming double (DNCH). DNCH exhibited better capacity than due to larger surface area more functional groups. possible mechanism toward phenol involved electrostatic, hydrogen bonding, π–π interactions. Study dynamic behavior indicated that breakthrough time increased when initial concentration feed flow rate decreased. Furthermore, longer at all operating conditions relatively higher DNCH. could be repeatedly without significant loss in binding affinity after six adsorption–desorption cycles, which qualified practical application.