Katyonik Boya Gideriminde Yeniden Kullanılabilir Bir Biyosorbent Olarak Manyetik Selüloz Temelli Yeni Bir Kompozit: Kesikli ve Sabit Yatakta Sürekli Sistem Çalışmaları
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Tarih
2022
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info:eu-repo/semantics/closedAccess
Özet
Bu çalışmada, önemli bir selüloz kaynağı olan Arenga Pinnata'dan ekstrakte edilen selüloz nanofibrillere TEMPO modifikasyonunun ardından manyetik özellik kazandırıldı. Sonrasında ise katyonik boya uzaklaştırılmasında kullanılması için karboksilik asit fonsiyonel grupları taşıyan metakrilik asit monomeri aşı kopolimerizasyonu yöntemi ile aşılandı. Üretilen manyetik özelliklik kazandırılmış kompozit fibrillarin karekterizasyonu, XRD, SEM, FTIR ve TGA gibi teknikler kullanılarak yapıldı. Kesikli sistemde ve sürekli sabit yataklı sistemde adsorpsiyon ve desorpsiyon davranşı isotherm ve kinetic modellerle değerlendirildi. Manyetik selüloz temelli kompozit malzemenin model boya olarak seçilen MB adsorsiyonuna karşı yüksek afinite segilediği ve maksimum adsorpsiyon kapasitesinin 201 mg/g olduğu belirlendi. Bununla birlikte, malzemenin onbeşinci adsorpsiyon/desorpsiyon döngüsünde hala %75 kapasite ile kullanılabilir olduğu belirlendi. Sürdürülebilir kaynaktan elde edilen, model kirletici olarak seçilen katyonik MB'ya karşı yüksek afinite sergileyen, manyetik özelliği sayesinde de ortamdan hızlı geri kazanılabilir bir malzeme olan polimetakrilik asit aşılı manyetik selüloz fibrillarin, etkin, ucuz, ve en önemlisi yüksek rejenerasyon/tekrar kullanılabilir özelliği sayesinde, atık sulardan kirleticilerin uzaklaştırılmasında ucuz ve etkin bir adsorbent olarak kullanılabileceği önerilmektedir.
In this study, cellulose nanofibrils extracted from Arenga Pinnata, an important cellulose source, gained magnetic properties with TEMPO modification. Then methacrylic acid monomer carrying carboxylic acid functional groups was grafted with graft copolymerization method to be used in cationic dye removal. Characterization of the magnetically enhanced composite fibrils was performed using techniques such as XRD, SEM, FTIR, and TGA. Adsorption and desorption behavior in the batch and continuous fixed bed systems was evaluated with isotherm and kinetic models. It was determined that the magnetic cellulose-based composite material exhibited a high affinity for the MB adsorption selected as the model dye, and the maximum adsorption capacity was 201 mg/g. However, it was determined that the material was still usable at 75% capacity in the fifteenth adsorption/desorption cycle. Polymethacrylic acid grafted magnetic cellulose fibrillarin, which is obtained from sustainable sources, exhibits a high affinity for cationic MB selected as a model pollutant, and is quickly recoverable from the environment thanks to its magnetic property, is effective, inexpensive, and most importantly, thanks to its high regeneration/reusability feature. It is suggested that it can be used as a cheap and effective adsorbent to remove pollutants from wastewater.
In this study, cellulose nanofibrils extracted from Arenga Pinnata, an important cellulose source, gained magnetic properties with TEMPO modification. Then methacrylic acid monomer carrying carboxylic acid functional groups was grafted with graft copolymerization method to be used in cationic dye removal. Characterization of the magnetically enhanced composite fibrils was performed using techniques such as XRD, SEM, FTIR, and TGA. Adsorption and desorption behavior in the batch and continuous fixed bed systems was evaluated with isotherm and kinetic models. It was determined that the magnetic cellulose-based composite material exhibited a high affinity for the MB adsorption selected as the model dye, and the maximum adsorption capacity was 201 mg/g. However, it was determined that the material was still usable at 75% capacity in the fifteenth adsorption/desorption cycle. Polymethacrylic acid grafted magnetic cellulose fibrillarin, which is obtained from sustainable sources, exhibits a high affinity for cationic MB selected as a model pollutant, and is quickly recoverable from the environment thanks to its magnetic property, is effective, inexpensive, and most importantly, thanks to its high regeneration/reusability feature. It is suggested that it can be used as a cheap and effective adsorbent to remove pollutants from wastewater.
