Synthesis and adsorption behaviors of dendrimeric cross-linked networks with bio-based phytic acid groups obtained by UV curing

Abstract

The treatment of wastewater, which has become a major environmental concern as industry has grown, is an important research topic. In this study, a dendrimeric cross-linked network had been designed as a new adsorbent for the removal of Crystal violet dye (CV) from aqueous solutions. First, dendrimers of the polyamidoamine (PAMAM) type with an ethylene diamine core were developed. Then, glycidyl metacrylate (GMA) was independently used to modify bio-based phytic acid and PAMAM dendrimer. The formation of a polymeric network structure with phosphoric acid groups that may be employed as an adsorbent (PG-PAG) was then accomplished using the UV curing. Nuclear Magnetic Resonance Spectroscopy (NMR), and Fourier-Transform Infrared-Attenuated Total Reflection (FTIR-ATR) were employed to characterize the polyester polymers. Differential Scanning Calorimetry (DSC), SEM-EDX (Scanning Electron Microscope-Energy Dispersion Spectroscopy), and Brunauer-Emmet-Teller surface measurement analysis (BET) were used to analyze the polymeric networks. The adsorbent’ adsorption and desorption behavior were examined. In this adsorption mechanism, which conforms to the Langmuir isotherm model, the theoretical capacity was calculated as 250 mg/g. In addition, kinetically suitable for the pseudo-second-order model was determined. According to the findings, this novel adsorbent may be used regardless of the pH of the aqueous media. Furthermore, in contrast to previously studied bio-based adsorption materials, the materials used in this study have extraordinarily high adsorptive capabilities. According to the pseudo-second-order model, theoretical 555.55 mg/g and experimental 530.43 mg/g capacities were found.