Synthetic Of New Polyester Networks Containing β-cyclodextrin Cavities For Removal Of Paraben Derivatives From Water Resources By Inclusion Complexes

The aim of this work was developed, new thermally stable synthetic polyester network containing β-cyclodextrin (β-CD) cavities with good absorbent behavior to remove organic pollutants such as parabens derivatives (methyl and propyl parabens) into aqueous solution. β-Cyclodextrin polyester network (β-CDPN) (6) was synthesized by reaction of β-CD (5) with N,N´-(4,4´-diphenylether) bis trimellitimide diacid chloride (4) as cross linker agent in the presence of sodium hydride. Diimide acid chloride (3) as synthetic cross linker agent prepared by two-step reactions. The sorbent process optimized by four different parameters such as pH, temperature of the solution, contact time, β-CDPN ratio and data measure by using HPLC technique. Results show the high absorbent capacity of parabens (about 99%) by β-CDPN cavities. On the other hand, the results of adsorption kinetics and equilibrium isotherms (Langmuir, Freundlich models) shown high correlation coefficient (closer to a unit) for the pseudo-second-order and great fitted the adsorption data with the Langmuir isotherm model. The adsorption ability of β-CDPN (6) kept nearly unchanged after five filtration-regeneration cycles, also TGA and DTG experiments show β-CDPN (6) has good thermal stability and able to use in a wide range of temperatures.