Next Article in Journal
Determination of the Rate of Salt-Induced Rapid Coagulation of Polystyrene Latex Particles in Turbulent Flow Using Small Stirred Vessel
Next Article in Special Issue
Characterization of Multimodal Silicas Using TG/DTG/DTA, Q-TG, and DSC Methods
Previous Article in Journal / Special Issue
Dispersions of Metal Oxides in the Presence of Anionic Surfactants
Open AccessArticle

Equilibrium, Kinetic, and Thermodynamic Studies of Anionic Dyes Adsorption on Corn Stalks Modified by Cetylpyridinium Bromide

Faculty of Chemistry, Odessa I.I. Mechnikov National University, 2, Dvoryanskaya Str., Odessa 65082, Ukraine
*
Author to whom correspondence should be addressed.
Colloids Interfaces 2019, 3(1), 4; https://doi.org/10.3390/colloids3010004
Received: 27 November 2018 / Revised: 21 December 2018 / Accepted: 22 December 2018 / Published: 23 December 2018
Corn stalks (CS) were modified by a cationic surfactant, cetylpyridinium bromide (CPB), and used as an adsorbent (CS-CP) to remove anionic dyes [Acid Red (AR) and Acid Orange (AO)] from aqueous solutions. The FTIR analysis and the obtained calculations based on the determination of the adsorption capacity of CS towards CPB confirmed that the cationic surfactant had been adsorbed on the surface of corn stalks. Adsorption of the anionic dyes on modified corn stalks was investigated in a series of batch adsorption experiments at 303–328 K. The adsorption data were analyzed using Langmuir, Freundlich, and Temkin models. The Langmuir model was found to be more suitable for the experimental data of the anionic dyes on CS-CP than other adsorption models. Kinetic studies revealed that the pseudo-second order model showed the best fit to the experimental data. The thermodynamic parameters indicated that the adsorption process was spontaneous and exothermic. Mechanisms involving ion exchange and chemisorption might be responsible for the uptake of the anionic dyes on CS-CP. Obtained results imply that CS-CP could be applied as an effective adsorbent to remove anionic dyes from aqueous solutions. View Full-Text
Keywords: anionic dyes; cetylpyridinium bromide; modified corn stalks; adsorption; equilibrium; kinetics; thermodynamics anionic dyes; cetylpyridinium bromide; modified corn stalks; adsorption; equilibrium; kinetics; thermodynamics
Show Figures

Figure 1

MDPI and ACS Style

Soldatkina, L.; Zavrichko, M. Equilibrium, Kinetic, and Thermodynamic Studies of Anionic Dyes Adsorption on Corn Stalks Modified by Cetylpyridinium Bromide. Colloids Interfaces 2019, 3, 4.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop