Schiff Bazlı Fonksiyonelleştirilmiş Yeni Sporopollenin Mikrokapsülünün Sentezi ve Karakterizasyonu ve Cu(II)'nin Etkili Adsorpsiyonu için Kullanımı

Abstract

Cu (II) ions, which cause serious diseases such as cancer and liver damage, have an important place, especially in water pollution. To effectively remove these deadly copper (II) ions from aqueous solution, the synthesis of a new functionalized sporopollenin microcapsules (Sp-CPTS-HNMAA) to be used as an adsorbent was aimed. Schiff base (HNMAA), used to functionalize the surface of sporopollenin, was obtained as a result of the reaction of 2-Hydroxy-1-naphthaldehyde and glycine and was characterized by 1H and 13C NMR. The synthesized Sp-CPTS-HNMAA microcapsule adsorbent was successfully characterized by FTIR, XRD, and SEM techniques. The effects of initial Cu (II) concentration, temperature, pH, anion, contact time, and adsorbent dose were researched in adsorption experiments. The adsorption equilibrium was calculated as 92.73%, with a contact time of 150 min, initial Cu (II) ion concentration of 30 mg L-1, pH = 6, and maximum Cu(II) removal with 0.03 g adsorbent dose. The maximum Cu (II) adsorption capacity of Sp-CPTS-HNMAA microcapsule adsorbent was calculated from the Langmuir isotherm and found to be 32.57 mg g-1. Adsorption isotherm and kinetic studies indicated that it fits the Langmuir adsorption isotherm and pseudo-second-order kinetic model. The results of thermodynamic studies show that the adsorption reaction is reversible, spontaneous, and endothermic, and also showed that the adsorption of Cu (II) ions on Sp-CPTS-HNMAA is a chemical adsorption process.