Kitosan/modifiye montmorillonit küreler ile asit Violet 90 boyarmaddesinin adsorpsiyonu

Yıl 2024, , 2463 - 2472, 20.05.2024

Müjgan Okur , Berkay Taşkıntuna

https://doi.org/10.17341/gazimmfd.1334945

Öz

Sentetik boyar maddeler kağıt, plastik, deri, yün ve tekstil gibi bir çok endüstriyel alanda renklendirici olarak yaygın bir şekilde kullanılmaktadırlar. Bu boyar maddeleri içeren atıksular arıtılmadan alıcı su ortamlarına bırakıldığında, su ortamının ışık geçirgenliğini azaltarak sucul yaşamdaki fotosentetik aktiviteleri engellemekte, çevre, hayvan ve insan yaşam döngülerine zarar vermektedir. Bu nedenle boyar maddelerin sulardan arıtılmaları gerekmektedir. Adsorpsiyon uygun maliyetli, kolay uygulanabilir ve etkili giderim verimlerinin elde edildiği yöntemlerden birisidir. Bu çalışmada boyar madde adsorpsiyonunda kullanılmak üzere kitosan (CTS) ve modifiye montmorillonit (mMMT) içeren CTS/mMMT küreler hazırlanmıştır. Deneylerde metal-kompleks bir boyar madde olan Asit Violet 90 (AV90) kullanılmıştır. CTS ve CTS/mMMT küreler damlatma yöntemiyle hazırlanmıştır. Kürelerin morfolojik yapıları taramalı elektron mikroskobu (SEM) ile ve fonksiyonel grupları Fourier geçirimli infrared spektroskopisi (FT-TR) ile incelenmiştir. Küreler ile AV90 adsorpsiyonuna başlangıç pH ve boyar madde derişiminin etkisi incelenmiştir. Deneyler kesikli sistemde gerçekleştirilmiştir. En yüksek boyar madde giderimi pH 2’de elde edilmiştir. Elde edilen deneysel verilere adsorpsiyon izoterm modelleri (Langmuir, Freundlich ve Temkin) uygulanmış ve AV90 adsorpsiyonu için en uygun modelin Langmuir olduğu görülmüştür. Langmuir izoterm modelinden elde edilen adsorpsiyon kapasiteleri (qm, mg/g) CTS için 26,81 mg/g ve CTS/mMMT için 91,74 mg/g’dır. Yapılan çalışma ile modifiye montmorillonit içeren kürelerin boyar madde adsorpsiyonunda başarılı bir şekilde kullanılabileceği görülmüştür.

Anahtar Kelimeler

Kitosan, montmorillonit, adsorpsiyon izotermleri, adsorpsiyon

Kaynakça

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