Microfabrication of Triazine Functionalized Graphene Oxide Anchored Alginate Bead System for Effective Nutrients Removal
Ilango Aswin Kumar, Mu. Naushad, Natrayasamy Viswanathan
Abstract
In this study, triaminotriazine (TAT) functionalized graphene oxide (GO) namely TATGO composite was prepared by dispersing TAT into GO for nitrate (NO3−) and phosphate (PO43−) adsorption. Further, the TATGO composite was structurally modified using sodium alginate (Alg) to give the usable TATGO@Alg composite beads for NO3− and PO43− adsorption. The synthesized TATGO@Alg composite beads was compared to their respective parent materials possess the enhanced sorption capacity (qe) of 51.83 and 58.46 mg g−1 toward NO3− and PO43−. The prepared adsorbents were characterized using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), thermo gravimetric analysis (TGA), X-ray diffraction (XRD), Brunauer−Emmett−Teller (BET), and energy-dispersive X-ray analysis (EDAX) techniques. The parameters liable for the NO3− and PO43− adsorption process, such as contact time, pH, co-ions, adsorbent dosage, initial ions concentration, and temperature, were optimized under batch conditions. The adsorption kinetic and thermodynamic parameters were investigated for TATGO@Alg composite beads. The NO3− and PO43− removal mechanism of TATGO@Alg composite beads was discussed in detail. The field studies and regeneration of TATGO@Alg composite beads were also investigated.