title: Dye adsorption of cotton fabric grafted with PPI dendrimers: Isotherm and kinetic studies.
abstract: In this research, the cotton fabrics grafted with two generations of the poly(propylene imine) dendrimers were applied to adsorb textile dyes from aqueous solutions. Direct Red 80 (anionic dye), Disperse Yellow 42 (nonionic dye) and Basic Blue 9 (cationic dye) were selected as model dyes. The effect of various experimental parameters such as initial concentration of dyes, charge of dyes molecule, salt and pH was investigated on the adsorption process. Furthermore, kinetics and equilibrium of the adsorption process on the grafted samples were studied. It was found that maximum adsorption of anionic and disperse dyes took place at around pH 3, while cationic dye could be adsorbed at around pH 11. The Langmuir equation was able to describe the mechanism of dyes adsorption. In addition, the second-order equation was found to be fit with the kinetics data. Interestingly, it seems that the dye adsorption of the grafted fabrics is strongly pH dependent.
authors: Textile Department, Amirkabir University of Technology, Tehran, Iran.
authors: Samera
authors: S
authors: Salimpour Abkenar
authors: Textile Department, Amirkabir University of Technology, Tehran, Iran. Electronic address: rmamalek@aut.ac.ir.
authors: Reza Mohammad Ali
authors: RM
authors: Malek
authors: Textile Department, Amirkabir University of Technology, Tehran, Iran.
authors: Firouzmehr
authors: F
authors: Mazaheri
mesh_terms: D000327:Adsorption; D000838:Anions; D001391:Azo Compounds / Q000737:chemistry*; D002412:Cations; D032561:Cotton Fiber; D050091:Dendrimers / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008751:Methylene Blue; D011126:Polypropylenes / Q000737:chemistry*; D012996:Solutions; D013424:Sulfanilamides / Q000737:chemistry; D013843:Thiazines / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods
chemical_list: D000838:Anions; D001391:Azo Compounds; D002412:Cations; D050091:Dendrimers; C000607030:Disperse Yellow 42; D011126:Polypropylenes; D012996:Solutions; D013424:Sulfanilamides; D013843:Thiazines; D014874:Water Pollutants, Chemical; C443641:poly(propyleneimine); C009798:C.I. direct red 80; D008751:Methylene Blue
keywords: Adsorption; Isotherm; Langmuir; Nanoparticles; PPI dendrimers