Adsorption Characteristics of Bixin on Acid- and Alkali-Treated Kaolinite in Aprotic Solvents
Joint Authors
Mouloungui, Zéphirin
Rahmalia, Winda
Fabre, Jean-François
Usman, Thamrin
Source
Bioinorganic Chemistry and Applications
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-01-18
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The adsorption of bixin in aprotic solvents onto acid- and alkali-treated kaolinite was investigated.
Kaolinite was treated three times, for 6 h each, with 8 M HCl or 5 M KOH.
The adsorbents were characterized by XRD, FT-IR, EDS, and BET-N2.
The effects of contact time and dye concentration on adsorption capacity and kinetics, electronic transition of bixin before and after adsorption, and also mechanism of bixin-kaolinite adsorption were investigated.
Dye adsorption followed pseudo-second order kinetics and was faster in acetone than in dimethyl carbonate.
The best adsorption results were obtained for KOH-treated kaolinite.
In both of the solvents, the adsorption isotherm followed the Langmuir model and adsorption capacity was higher in dimethyl carbonate (qm = 0.43 mg/g) than in acetone (0.29 mg/g).
The adsorption capacity and kinetics of KOH-treated kaolinite (qm = 0.43 mg/g, k2 = 3.27 g/mg·min) were better than those of HCl-treated kaolinite (qm = 0.21 mg/g, k2 = 0.25 g/mg·min) and natural kaolinite (qm = 0.18 mg/g, k2 = 0.32 g/mg·min).
There are shift in the band position of maximum intensity of bixin after adsorption on this adsorbent.
Adsorption in this system seemed to be based essentially on chemisorption due to the electrostatic interaction of bixin with the strong basic and reducing sites of kaolinite.
American Psychological Association (APA)
Rahmalia, Winda& Fabre, Jean-François& Usman, Thamrin& Mouloungui, Zéphirin. 2018. Adsorption Characteristics of Bixin on Acid- and Alkali-Treated Kaolinite in Aprotic Solvents. Bioinorganic Chemistry and Applications،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1123140
Modern Language Association (MLA)
Rahmalia, Winda…[et al.]. Adsorption Characteristics of Bixin on Acid- and Alkali-Treated Kaolinite in Aprotic Solvents. Bioinorganic Chemistry and Applications No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1123140
American Medical Association (AMA)
Rahmalia, Winda& Fabre, Jean-François& Usman, Thamrin& Mouloungui, Zéphirin. Adsorption Characteristics of Bixin on Acid- and Alkali-Treated Kaolinite in Aprotic Solvents. Bioinorganic Chemistry and Applications. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1123140
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1123140