The interaction between reactive dye containing vinylsulfone group and chitosan microspheres

Autor:	Mauro C. M. Laranjeira, Lígia Furlan, Irene Y. Kimura, Valfredo T. Fávere
Rok vydání:	2002
Předmět:	Langmuir Polymers and Plastics Contact time General Chemical Engineering technology industry and agriculture Protonation Analytical Chemistry Chitosan chemistry.chemical_compound Adsorption chemistry Group (periodic table) Polymer chemistry Reactive dye Nuclear chemistry Chitosan microspheres
Zdroj:	International Journal of Polymeric Materials. 51:759-768
ISSN:	1563-535X 0091-4037
DOI:	10.1080/714975829
Popis:	Chitosan microspheres were employed as adsorbent in aqueous medium for the reactive orange 16 containing the vinylsulfone group. Adsorption isotherms were obtained varying pH, contact time, and initial concentration of the dye in the solution. The results from the adsorption experiments were analyzed using Langmuir's isotherm. An increase in the adsorption capacity as the pH decreased could be observed. Maximum adsorption reached 30.4mg/g and 5.6mg/g for pH 2.0 and 10.0, respectively. This effect could be mainly attributed to an increase in the contents of the NH + 3 group present in acid media, which resulted in a higher electrostatic attraction between the anionic dye and the protonated chitosan.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d0d6ab85c9c69acbe0ce2875c6dd4d39 https://doi.org/10.1080/714975829 Zobrazit plný text záznamu