Manyetik Karboksimetil Selüloz/Maya Kompozit Kürelerinin Hazırlanması ve Remazol Brilliant Blue R Adsorpsiyon Özelliklerinin İncelenmesi

Öz

Bu çalışmada, Saccharomyces cerevisiae biyokütlesi ve karboksimetil selüloz (CMC) kullanılarak manyetik mag-CMC/maya kompozit küreleri hazırlanmış ve Remazol Brilliant Blue R (RBBR) boyar maddesinin adsorpsiyonla gideriminde kullanılmıştır. Kompozitin yapısal ve ısıl özellikleri FT-IR, XRD, SEM ve TGA analizleri ile belirlenmiştir. FT-IR ve XRD sonuçları, Fe3O4 nanoparçacıklarının yapıya başarıyla dahil edildiğini ve manyetik yapının oluştuğunu göstermiştir. SEM görüntülerinde Fe3O4 katkısıyla yüzeyin daha pürüzlü hale geldiği, TGA analizinde ise kompozitin sıcaklıkla birlikte karakteristik kütle kaybı sergilediği belirlenmiştir. Adsorpsiyon çalışmalarında pH, temas süresi ve başlangıç boyar madde derişiminin etkileri incelenmiştir. En yüksek adsorpsiyon kapasitesi asidik ortamda elde edilmiş olup, pH arttıkça kapasite azalmıştır. Kinetik analizler sonucunda adsorpsiyon verilerinin yalancı ikinci derece kinetik modeline (R² = 0.9989) ve Elovich modeline (R² = 0.9805) yüksek uyum sağladığı, bu durumun adsorpsiyon hızında yüzey etkileşimlerinin ve kimyasal süreçlerin de etkili olabileceğini düşündürdüğü belirlenmiştir. Denge verileri Langmuir, Freundlich ve Temkin izotermleri ile analiz edilmiş; Langmuir modelinden maksimum adsorpsiyon kapasitesi 149,25 mg/g olarak hesaplanmıştır. Çalışmanın deiyonize su ortamında (sentetik çözeltilerde) gerçekleştirilmiş olması bir kısıtlılık oluşturmakta olup, karmaşık atık su matrislerindeki rakip iyon etkilerinin ve desorpsiyon/yeniden kullanılabilirlik performansının gelecek çalışmalarda incelenmesi önerilmektedir. Sonuç olarak, mag-CMC/maya kompozit kürelerinin biyokütle temelli yapısı ve harici manyetik alan yardımıyla çözeltiden kolayca ayrılabilmesi sayesinde, sulardan anyonik boyar madde giderimi için potansiyel bir adsorban olduğu değerlendirilmiştir.

Anahtar Kelimeler

• Karboksimetil selüloz
• Saccharomyces cerevisiae
• Manyetik kompozit
• Remazol Brilliant Blue R

Etik Beyan

Bu çalışma için etik kurul izni gerekmemektedir.

Preparation of Magnetic Carboxymethyl Cellulose/Yeast Composite Spheres and Investigation of Their Remazol Brilliant Blue R Adsorption Properties

Öz

In this study, magnetic mag-CMC/yeast composite beads were prepared using Saccharomyces cerevisiae biomass and carboxymethyl cellulose (CMC) and used for the adsorption removal of Remazol Brilliant Blue R (RBBR). The composite was characterized using FT-IR, XRD, SEM, and TGA. The FT-IR and XRD results confirmed the successful incorporation of Fe₃O₄ nanoparticles into the composite structure and the formation of a magnetic composite. SEM images showed that the surface became rougher after Fe₃O₄ incorporation, while TGA revealed characteristic mass-loss behavior in the composite as temperature increased. The effects of pH, contact time, and initial dye concentration on adsorption were investigated. The highest adsorption capacity was observed under acidic conditions, and it decreased with increasing pH. Kinetic analysis showed that the adsorption data fitted well to the pseudo-second-order kinetic model (R² = 0.9989) and the Elovich model (R² =0.9805), suggesting that surface interactions and chemical processes may also contribute to the adsorption rate. Equilibrium data were analyzed using the Langmuir, Freundlich, and Temkin isotherm models, and the Langmuir model predicted a maximum adsorption capacity of 149.25 mg/g. The use of deionized water (synthetic solutions) in the experiments is a limitation of the study; therefore, future studies should investigate the effects of competing ions in complex wastewater matrices and the desorption/reusability performance. Overall, the mag-CMC/yeast composite beads were evaluated as a potential adsorbent for removing anionic dyes from aqueous solutions because of their biomass-based structure and their ability to be readily separated from the solution using an external magnetic field.

Anahtar Kelimeler

• Carboxymethyl cellulose
• Saccharomyces cerevisiae
• Magnetic composite
• Remazol Brilliant Blue R

Etik Beyan

Ethics committee approval is not required for this study.

Kaynakça

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