Removal of Direct Azo Dyes and Aromatic Amines From Aqueous Solutions Using Two Beta-Cyclodextrin-Based Polymers
Yükleniyor...
Dosyalar
Tarih
2010
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Two beta-cyclodextrin (beta-CD)-based polymers were synthesized using 4,4'-methylene-bis-phenyldiisocyanate (MDI) or hexamethylenediisocyanate (HMDI) as a cross linking agent in dimethylformamide and used as sorbents for the removal of azo dyes (Evans Blue and Chicago Sky Blue), as well as aromatic amines (benzidine. p-chloroaniline and alpha-naphthalamine) from aqueous solutions. The sorption experiments were carried out by using batch-wise procedure involving the determination of pH effect, sorbate concentration and contact time. Moreover, from the equation isotherms such as Langmuir and Freundlich were successfully applied to model the experimental data. From the results polymer 2 was found to be a better sorbent for both azo dyes and the aromatic amines as compared to polymer I as proved by Langmuir isotherm model. The proposed sorption mechanism involved several kinds of interactions: physical adsorption, hydrogen bonding and formation of an inclusion complex due to the beta-CD molecules through host-guest interactions.
Açıklama
Anahtar Kelimeler
beta-Cyclodextrin, Carcinogens, Direct azo dye, Aromatic amines, Sorption, Solid-phase extraction
Kaynak
Journal of Hazardous Materials
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
174
Sayı
Künye
Yılmaz, E., Memon, S., Yılmaz, M., (2010). Removal of Direct Azo Dyes and Aromatic Amines From Aqueous Solutions Using Two Beta-Cyclodextrin-Based Polymers. Journal of Hazardous Materials, (174), 592-597. Doi: 10.1016/j.jhazmat.2009.09.093
