Kinetics and Mechanism of Cationic Dyes Adsorption onto Modified b-Cyclodextrin Microspheres

Author

Li, Fengyu ; SUN, Xiaomei ; Li, Buhai

Author_Institution

Sch. of Environ. & Civil Eng., Wuhan Inst. of Technoloy, Wuhan, China

fYear

2010

fDate

7-9 Nov. 2010

Firstpage

1

Lastpage

5

Abstract

The kinetics and mechanism of the removal of methylene blue(MB) and neutral red (NR) from aqueous solution using pyromellitic dianhydride (PMDA) grafted β-Cyclodextrin (β-CD) as adsorbent have been investigated. The effects concerning contact time and initial dye concentration were studied in batch experiments. The experiments results showed that this adsorbents exhibited high sorption capacities toward MB and NR. The equilibrium process was described well by the monolayer adsorption isotherm. It was found that kinetic studies showed good correlation coefficients for a pseudo-second-order kinetic model, confirming that the sorption rate was controlled by chemical adsorption. The maximum adsorption capacities were 504.1 mg g^-1 and 561.8mg g^-1 for MB and NR, respectively.

Keywords

adsorption; dyes; adsorbent; cationic dyes adsorption; chemical adsorption; equilibrium process; kinetics; methylene blue removal; modified β-cyclodextrin microspheres; monolayer adsorption isotherm; neutral red; pseudo-second-order kinetic model; pyromellitic dianhydride grafted β-cyclodextrin; sorption rate; Equations; Ions; Kinetic theory; Mathematical model; Metals; Scanning electron microscopy; Vibrations;

fLanguage

English

Publisher

ieee

Conference_Titel

E-Product E-Service and E-Entertainment (ICEEE), 2010 International Conference on

Conference_Location

Henan

Print_ISBN

978-1-4244-7159-1

Type

conf

DOI

10.1109/ICEEE.2010.5660548

Filename

5660548