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.
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