Published January 15, 2011 | Version v1
Journal article Metadata-only

Adsorption of chromium (VI) by ethylenediamine-modified cross-linked magnetic chitosan resin: Isotherms, kinetics and thermodynamics

Creators

  • 1. Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082 (China)
  • 2. College of Environmental Science and Engineering, Hunan University, Changsha 410082 (China)
  • 3. School of Urban Construction, University of South China, Hengyang, Hunan 421001 (China)
  • 4. College of Environmental Science and Engineering, Hunan University, Changsha 410082 (China) and Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082 (China)

Description

The adsorption of chromium (VI) ions from aqueous solution by ethylenediamine-modified cross-linked magnetic chitosan resin (EMCMCR) was studied in a batch adsorption system. Chromium (VI) removal is pH dependent and the optimum adsorption was observed at pH 2.0. The adsorption rate was extremely fast and the equilibrium was established within 6-10 min. The adsorption data could be well interpreted by the Langmuir and Temkin model. The maximum adsorption capacities obtained from the Langmuir model are 51.813 mg g-1, 48.780 mg g-1 and 45.872 mg g-1 at 293, 303 and 313 K, respectively. The adsorption process could be described by pseudo-second-order kinetic model. The intraparticle diffusion study revealed that film diffusion might be involved in the present case. Thermodynamic parameters revealed the feasibility, spontaneity and exothermic nature of adsorption. The sorbents were successfully regenerated using 0.1 N NaOH solutions.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jhazmat.2010.09.034

Additional details

Identifiers

DOI
10.1016/j.jhazmat.2010.09.034;
PII
S0304-3894(10)01193-3;

Publishing Information

Journal Title
Journal of Hazardous Materials
Journal Volume
185
Journal Issue
1
Journal Page Range
p. 306-314
ISSN
0304-3894
CODEN
JHMAD9

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44022670
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ADSORPTION; AMINO ACIDS; AQUEOUS SOLUTIONS; CHROMIUM; FILMS; ISOTHERMS; OLIGOSACCHARIDES; REACTION KINETICS; REMOVAL; RESINS; SODIUM HYDROXIDES; THERMODYNAMICS
Descriptors DEC
ALKALI METAL COMPOUNDS; CARBOHYDRATES; CARBOXYLIC ACIDS; DISPERSIONS; ELEMENTS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; HYDROXIDES; KINETICS; METALS; MIXTURES; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; POLYMERS; SACCHARIDES; SODIUM COMPOUNDS; SOLUTIONS; SORPTION; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.