Kestane kabuğu kullanılarak sulu çözeltilerden boyar madde gideriminin izoterm, kinetik ve termodinamik analizi

Yıl 2022, Cilt: 12 Sayı: 4, 1158 - 1167, 15.10.2022

Betül Tuba Gemici Aybüke Özden

https://doi.org/10.17714/gumusfenbil.983162

Cited By: 1

Öz

Bu çalışmada, kestane kabuğu kullanılarak sulu çözeltilerden kristal viyole boyar maddesinin giderimi incelenmiştir. Bu amaçla, başlangıç boyar madde derişimi, adsorbent dozajı, temas süresi, pH ve sıcaklık gibi parametrelerin adsorpsiyon performansı üzerindeki etkileri araştırılmıştır. Elde edilen sonuçlara göre, artan sıcaklık ve adsorbent dozajı ile giderim verimi artmıştır. Başlangıç boyar madde derişimi arttığında ise giderim veriminin azaldığı görülmüştür. Denge adsorpsiyon verileri kullanılarak yapılan izoterm çalışmalarında en iyi sonuç Langmuir izoterminde elde edilmiş ve optimize edilmiş koşullarda maksimum boyar madde adsorpsiyon kapasitesi 48.78 mg/g olarak hesaplanmıştır. Yalancı birinci dereceden ve yalancı ikinci dereceden kinetik modeller kullanılarak kinetik çalışmalar yapılmış ve yalancı ikinci dereceden kinetik modelin en uygun model olduğu tespit edilmiştir (R2>0.99). Termodinamik parametreler (ΔGo, ΔHo, ΔSo) adsorpsiyon işleminin uygulanabilir, kendiliğinden gerçekleşen ve endotermik olduğunu göstermiştir. Ayrıca adsorpsiyon öncesi ve sonrası için FTIR analizleri gerçekleştirilmiştir. Bu sonuçlar, sulu çözeltilerden kristal viyolenin uzaklaştırılması için alternatif ve düşük maliyetli bir malzeme olarak kestane kabuğunun kullanılabileceğini göstermiştir.

Anahtar Kelimeler

Adsorpsiyon, İzoterm, Kestane kabuğu, Kinetik, Kristal viyole, Termodinamik

Destekleyen Kurum

TUBİTAK

Proje Numarası

1919B011904047

Teşekkür

Bu çalışma, numarası 1919B011904047 olan 2209-A Üniversite Öğrencileri Araştırma Projeleri Destekleme Programı ile maddi olarak desteklenmiştir. Makalenin inceleme ve değerlendirme aşamasında yapmış oldukları katkılardan dolayı editör ve hakemlere teşekkür ederiz.

Isotherm, kinetics and thermodynamic analysis of dye removal from aqueous solutions using chestnut shell

Öz

In this study, the removal of crystal violet dyes from aqueous solutions using chestnut shell was investigated. For this purpose, the effects of parameters such as initial dye concentration, adsorbent dosage, contact time, pH and temperature on adsorption performance were investigated. According to the results obtained, the removal efficiency increased with increasing temperature and adsorbent dosage. It was observed that the removal efficiency decreased when the initial dye concentration increased. In the isotherm studies using equilibrium adsorption data, the best results were obtained in the Langmuir isotherm and the maximum dye adsorption capacity under optimized conditions was calculated as 48.78 mg/g. Kinetic studies were carried out using pseudo-first and pseudo-second-order kinetic models and it was determined that the pseudo-second-order kinetic model was the most appropriate (R2>0.99). Thermodynamic parameters (ΔGo, ΔHo, ΔSo) showed that the adsorption process was feasible, spontaneous and endothermic. In addition, FTIR analyzes were performed before and after adsorption. These results showed that chestnut shell can be used as an alternative and low-cost material for the removal of crystal violet from aqueous solutions.

Anahtar Kelimeler

Adsorption, Isotherm, Chestnut Shell, Kinetics, Crystal Violet, Thermodynamics

Proje Numarası

1919B011904047

Kaynakça

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