Preparation of Dextran Cryogels and Some of Their Applications
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Tarih
2019
Yazarlar
Dergi Başlığı
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, dextran (DEX) cryogels were prepared using 50% divinyl sulfone (DVS)crosslinker based on the repeating unit of DEX, under cryogenic conditions viacryogellation technique. It was shown that DEX cryogels can be used as column fillersto remove toxic substances such as organic dye, methylene blue (MB), pesticide, andparaquat (PQ) which are harmful to the environment and human health. The maximumabsorption capacity of 15 mg DEX cryogels was determined as 10.69±0.14 mg/g using5 mL of 100 ppm MB dye in about seven minutes, and as 2.87±0.33 mg/g from 5 mL of40 ppm PQ pesticide in about ten minutes. The reusability of DEX cryogel for MB wasalso examined. In the consecutive use of DEX cryogel weighing ~30 mg, initiallycryogel absorbed 6.43±0.15 mg MB/g cryogel from 20 ppm 30 mL MB dye, but thisvalue decreased to 4.71±0.48 mg MB/g cryogel after the fifth use. The same cryogelreleased the same amount of MB dye after the first use of 3.78±0.33 mg MB/g cryogel,but after the fifth use the release amount decreased to 0.92±0.38 mg MB/g cryogel upontreatment with 1 M 30 mL HCl solution. The adsorption kinetics of DEX cryogel forMB were also examined and the Langmuir isotherm model with a correlation coefficientof 0.9983 and the KL value of 0.36, representing the best fit amongst the other wellknown models such as the Freundlich isotherm, Temkin, Elovich and DubininRadushkevich.
Açıklama
Anahtar Kelimeler
Kimya, Uygulamalı
Kaynak
Çanakkale Onsekiz Mart Üniversitesi Fen Bilimleri Enstitüsü Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
5
Sayı
2
