Insight into Equilibrium and Kinetics of the Binding of Cadmium Ions on Radiation-Modified Straw from Oryza sativa
Joint Authors
Salman, Muhammad
Athar, Makshoof
Ali, Sana Zulfiqar
Farooq, Umar
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-07-30
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Engineering Sciences and Information Technology
Chemistry
Science
Abstract EN
The present study reports the chemical modification of agricultural waste (rice straw) with urea using microwave radiation and the efficiency evaluation of this modified rice straw for the adsorption of a toxic heavy metal, cadmium.
The elemental analysis of urea modified rice straw affirmed urea grafting on rice straw, and FTIR spectra of chemically benign modified adsorbent showed the presence of hydroxyl, carbonyl, and amino functional groups.
Effects of process parameters (adsorbent dosage, contact time, agitation speed, pH, and temperature) were studied in batch mode.
Parameters were optimized for the equilibrium study, and adsorption mechanism was elucidated using five mathematical models (Langmuir, Freundlich, Temkin, Harkin-Jura, and Dubinin-Radushkevich).
Binding of Cd(II) ions on modified adsorbent followed Langmuir model, and the maximum uptake capacity was found to be 20.70 mg g−1.
Kinetic modeling was done using six different kinetic models.
The process was considered physisorption according to the obtained activation energy value.
Thermodynamic parameters confirmed the process to be favorable and feasible.
Exothermic nature of adsorption of Cd(II) ions on urea modified rice straw was confirmed by the negative value of ΔH°.
American Psychological Association (APA)
Ali, Sana Zulfiqar& Athar, Makshoof& Farooq, Umar& Salman, Muhammad. 2013. Insight into Equilibrium and Kinetics of the Binding of Cadmium Ions on Radiation-Modified Straw from Oryza sativa. Journal of Applied Chemistry،Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-470520
Modern Language Association (MLA)
Ali, Sana Zulfiqar…[et al.]. Insight into Equilibrium and Kinetics of the Binding of Cadmium Ions on Radiation-Modified Straw from Oryza sativa. Journal of Applied Chemistry No. 2013 (2013), pp.1-12.
https://search.emarefa.net/detail/BIM-470520
American Medical Association (AMA)
Ali, Sana Zulfiqar& Athar, Makshoof& Farooq, Umar& Salman, Muhammad. Insight into Equilibrium and Kinetics of the Binding of Cadmium Ions on Radiation-Modified Straw from Oryza sativa. Journal of Applied Chemistry. 2013. Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-470520
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-470520