Use of beta-cyclodextrin and starch based polymers for sorption of Congo red from aqueous solutions
Küçük Resim Yok
Tarih
2007
Yazarlar
Dergi Başlığı
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ELSEVIER
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Two starch-based and a P-cyclodextrin (beta-CD)-based polymers were synthesized using 4,4'-methylene-bis-phenyldiisocyanate (MDI) or hexamethylenediisocyanate (HMDI) as a cross linking agent in dry dimethylformamide and used as a sorbent for the removal of Congo red from aqueous solutions. The cross-linked polymers were characterized by Fourier transform infrared spectroscopy, thermogravimetric and differential scanning calorimetric analysis. The dye adsorption experiments were carried out by using batch and recycling column procedure. The effects of initial pH (pH(0)). the contact time and the initial dye concentration were changed to obtain the best experimental conditions. The pH(0) of the dye solution strongly affected the chemistry of both the dye molecules and polymer 3 in an aqueous solution. The effective pH(0) was 7.0 for adsorption on polymer 3. The equilibrium adsorption data were interpreted using Langmuir and Freundlich models. The adsorption of Congo red was better represented by the Freundlich equation. (C) 2007 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Congo red, sorption : beta-cyclodextrin, starch, isotherms
Kaynak
JOURNAL OF HAZARDOUS MATERIALS
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
148
Sayı
01.02.2020