The physical and surface chemical characteristics of activated carbons and the adsorption of methylene blue from wastewater


Autoria(s): Wang, S. B.; Zhu, Z. H.; Coomes, A.; Haghseresht, F.; Lu, G. Q .
Contribuinte(s)

Darsh T. Wasan

Data(s)

01/01/2005

Resumo

Adsorption of a basic dye, methylene blue, from aqueous solutions onto as-received activated carbons and acid-treated carbons was investigated. The physical and surface chemical properties of the activated carbons were characterized using BET-N-2 adsorption, X-ray photoelectron spectroscopy (XPS), and mass titration. It was found that acid treatment had little effect on carbon textural characteristics but significantly changed the surface chemical properties, resulting in an adverse effect on dye adsorption. The physical properties of activated carbon, such as surface area and pore volume, have little effect on dye adsorption, while the pore size distribution and the surface chemical characteristics play important roles in dye adsorption. The pH value of the solution also influences the adsorption capacity significantly. For methylene blue, a higher pH of solution favors the adsorption capacity. The kinetic adsorption of methylene blue on all carbons follows a pseudo-second-order equation. (c) 2004 Elsevier Inc. All rights reserved.

Identificador

http://espace.library.uq.edu.au/view/UQ:75042

Idioma(s)

eng

Publicador

Academic Press

Palavras-Chave #Chemistry, Physical #Activated Carbon #Dye Adsorption #Acid Treatment #Methylene Blue #Competitive Adsorption #Pore-size #Removal #C1 #290699 Chemical Engineering not elsewhere classified #670706 Organic industrial chemicals not elsewhere classified
Tipo

Journal Article