Synthesis and Characterization of the Schiff Base-on Functionalized Novel Sporopollenin Microcapsule and Its Use for Effective Adsorption of Cu (II)

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.

Keywords

• Sporopollenin
• adsorption
• thermodynamics
• Cu (II)
• microcapsule

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

Abstract

Kanser ve karaciğer hasarı gibi ciddi hastalıklara neden olan Cu (II) iyonları özellikle su kirliliğinde önemli bir yere sahiptir. Bu ölümcül bakır (II) iyonlarını sulu çözeltiden etkin bir şekilde uzaklaştırmak için, adsorban olarak kullanılacak yeni işlevselleştirilmiş sporopollenin mikrokapsüllerinin (Sp-CPTS-HNMAA) sentezi amaçlandı. Sporopollenin yüzeyini işlevselleştirmek için kullanılan Schiff bazı (HNMAA), 2-Hidroksi-1-naftaldehit ve glisinin reaksiyonu sonucu elde edilmiş ve 1H ve 13C NMR ile karakterize edilmiştir. Sentezlenen Sp-CPTS-HNMAA mikrokapsül adsorbanı, FTIR, XRD ve SEM teknikleri ile başarılı bir şekilde karakterize edildi. Adsorpsiyon deneylerinde başlangıç Cu (II) konsantrasyonu, sıcaklık, pH, anyon, temas süresi ve adsorban dozunun etkileri araştırıldı. Adsorpsiyon dengesi, 150 dakikalık bir temas süresi, 30 mg L-1 başlangıç Cu (II) iyon konsantrasyonu, pH = 6 ve 0.03 g adsorban dozu ile maksimum Cu(II) giderimi ile % 92.73 olarak hesaplandı. Sp-CPTS-HNMAA mikrokapsül adsorbanının maksimum Cu (II) adsorpsiyon kapasitesi Langmuir izoterminden hesaplandı ve 32.57 mg g-1 olarak bulundu. Adsorpsiyon izotermi ve kinetik çalışmaları, Langmuir adsorpsiyon izotermine ve yalancı ikinci dereceden kinetik modele uyduğunu göstermiştir. Termodinamik çalışmaların sonuçları, adsorpsiyon reaksiyonunun tersinir, kendiliğinden ve endotermik olduğunu ve ayrıca Cu (II) iyonlarının Sp-CPTS-HNMAA üzerinde adsorpsiyonunun kimyasal bir adsorpsiyon işlemi olduğunu göstermiştir.

Keywords

• Sporopollenin
• adsorpsiyon
• termodinamik
• Cu (II)
• mikrokapsül

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