WITHDRAWN: Removal of 2, 4 dichlorophenol as herbicide’s by-product using graphene oxide + CYPHOS® IL 103 ionic liquid entrapped in Fe3O4 magnetic poly-sulfone adsorbent

Abstract

2,4-Dichlorophenoxyacetic acid (2,4-D), a phenoxy alkanoic acid herbicide, is among the most widely distributed pollutants in the environment. 2,4-Dichlorophenol (2,4-DCP), as the main metabolite of 2,4-D, always accompanies 2,4 dichloro nitrophenol and is also frequently detected in the environment. The toxicity of 2,4 dichloro phenol is more severe than that of its parent 2,4- DCP at any concentration level. In this study, the removal of 2,4 dichloro phenol from an aqueous environment using graphene oxide + CYPHOS® IL 103 ionic liquid entrapped in Fe3O4 magnetic poly-sulfone was studied. Phase separation method was used to make CYPHOS® IL 103 ionic liquid entrapped in magnetic poly-sulfone facilitated to graphene oxide (Fe3O4/PSF@GO) adsorbent. Immobilization of Trihexyl (tetradecyl) phosphonium decanoate (CYPHOS® IL 103) ionic liquid in magnetic polysulfone-assisted graphene oxide was ascertained to be 85.6 % respectively. Furthermore, the obtained magnetic adsorbents were analyzed by the Langmuir, Freundlich, and Redlich-Peterson isotherms. The equilibrium data were best represented by the Redlich-Peterson model (R2 = 0.9926), with a maximum experimental adsorption capacity of 424.50 mg.g-1at room temperature. The adsorption kinetics was well described by the pseudo-second-order kinetic model, whereas intraparticle diffusion is the limiting step for the Weber-Morris model. Interestingly, graphene oxide + CYPHOS® IL 103 ionic liquid entrapped in poly-sulfone adsorbent was shown to be a promising material for adsorption of 2,4- Dichlorophenol (DCP) from aqueous solutions.