Adsorption of Anionic Surfactants onto Alumina: Characteristics, Mechanisms, and Application for Heavy Metal Removal
Joint Authors
Pham, Tien Duc
Minh Thu, Nguyen Thi
Nguyen, Ngoc Viet
Pham, Thi Ngoc Mai
Do, Thi Phuong Thao
Hoang, Thi Sim
Pham, Huy Dong
Nguyen, Trung Dung
Le, Thanh Son
Source
International Journal of Polymer Science
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-12-13
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
We investigated adsorption of anionic surfactants, sodium dodecyl sulfate (SDS) and sodium tetradecyl sulfate (STS), onto alumina (Al2O3) with large size in the present study.
The effective conditions for SDS and STS adsorption onto Al2O3 were systematically studied.
The conditions for SDS and STS adsorption onto γ-Al2O3 were optimized and found to be contact time 180 min, pH 4, and 1 mM NaCl.
Adsorption of both SDS and STS onto large Al2O3 beads increased with an increase of ionic strength, demonstrating that the adsorption is controlled by electrostatic attraction between anionic sulfate groups and positively charged Al2O3 surface, as well as hydrophobic interactions between long alkyl chains of surfactant molecules.
Nevertheless, the hydrophobic interaction in terms of STS adsorption is much higher than that of SDS adsorption.
The obtained SDS and STS adsorption isotherms in different NaCl concentrations onto Al2O3 beads were fitted well by two-step adsorption.
Adsorption mechanisms were disused in detail on the basis of adsorption isotherm, the change in surface charge, and the change in functional surface groups by Fourier-transform infrared spectroscopy (FTIR).
The application of surfactant adsorption onto Al2O3 to remove cadmium ion (Cd2+) was also studied.
The optimum conditions for Cd2+ removal using surfactant-modified alumina (SMA) are pH 6, contact time 120 min, and ionic strength 0.1 mM NaCl.
Under optimum conditions, the removal efficiency of Cd2+ using SMA increased significantly.
We demonstrate that SMA is a novel adsorbent for removal of Cd2+ from aqueous solution.
American Psychological Association (APA)
Minh Thu, Nguyen Thi& Do, Thi Phuong Thao& Hoang, Thi Sim& Nguyen, Ngoc Viet& Pham, Huy Dong& Nguyen, Trung Dung…[et al.]. 2018. Adsorption of Anionic Surfactants onto Alumina: Characteristics, Mechanisms, and Application for Heavy Metal Removal. International Journal of Polymer Science،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1175014
Modern Language Association (MLA)
Minh Thu, Nguyen Thi…[et al.]. Adsorption of Anionic Surfactants onto Alumina: Characteristics, Mechanisms, and Application for Heavy Metal Removal. International Journal of Polymer Science No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1175014
American Medical Association (AMA)
Minh Thu, Nguyen Thi& Do, Thi Phuong Thao& Hoang, Thi Sim& Nguyen, Ngoc Viet& Pham, Huy Dong& Nguyen, Trung Dung…[et al.]. Adsorption of Anionic Surfactants onto Alumina: Characteristics, Mechanisms, and Application for Heavy Metal Removal. International Journal of Polymer Science. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1175014
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1175014