263
© The Author(s), under exclusive license to Springer Nature
Switzerland AG 2021
B. Balabanova, T. Stafilov (eds.), Contaminant Levels and Ecological Effects,
Emerging Contaminants and Associated Treatment Technologies,
https://doi.org/10.1007/978-3-030-66135-9_9
Chapter 9
Removal of Chromium(VI) from Aqueous
Solution by Clayey Diatomite: Kinetic
and Equilibrium Study
Hamdije Memedi, Katerina Atkovska, Stefan Kuvendziev, Mrinmoy Garai,
Mirko Marinkovski, Dejan Dimitrovski, Blagoj Pavlovski, Arianit A. Reka,
and Kiril Lisichkov
Abstract The clayey diatomite from the village of Suvodol (Bitola region) used in
this research has shown to be a very effective and efficient natural material for the
removal of Cr(VI) ions from aqueous solutions. The adsorption of Cr(VI) ions onto
a clayey diatomite was shown to occur very efficiently with 96.7%. During the
experiments the effect of operating parameters, such as amount of adsorbent
(0.5–5.5 g/l), initial adsorbate concentration (0.3, 0.4, 0.5, and 0.6 mg/l), and time
of adsorption (5–180 min) at pH of the solution 3, was examined. It was found that
2.5 g/l is optimal adsorbent dosage for maximal removal of Cr(VI) ions. Atomic
absorption spectrophotometric (AAC) method and UV-Vis spectrophotometric
analysis are used for quantitative monitoring of the dynamics of the studied system
regarding the presence of Cr(VI) ions in the model solutions. The effect of the initial
concentration and quantity of adsorbent is examined, in order to determine the conditions that enable maximum removal of Cr(VI) ions with clayey diatomite. For the
purpose of modeling the equilibrium, the kinetics, and dynamics of the tested system of the process of elimination of Cr(VI) ions with the raw material in different
operating conditions, MATLAB/Curve Fitting Toolbox was conducted.
Keywords Adsorption · Equilibrium · Kinetics · Clayey diatomite · Cr(VI) ions
H. Memedi · A. A. Reka (*)
Department of Chemistry, Faculty of Natural Sciences and Mathematics, University of
Tetovo, Tetovo, Republic of North Macedonia
e-mail: arianit.reka@unite.edu.mk
K. Atkovska · S. Kuvendziev · M. Marinkovski · D. Dimitrovski · B. Pavlovski · K. Lisichkov
Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University,
Skopje, Republic of North Macedonia
M. Garai
Materials Science Centre, Indian Institute of Technology (IIT), Kharagpur, India
© The Author(s), under exclusive license to Springer Nature
Switzerland AG 2021
B. Balabanova, T. Stafilov (eds.), Contaminant Levels and Ecological Effects,
Emerging Contaminants and Associated Treatment Technologies,
https://doi.org/10.1007/978-3-030-66135-9_9
Chapter 9
Removal of Chromium(VI) from Aqueous
Solution by Clayey Diatomite: Kinetic
and Equilibrium Study
Hamdije Memedi, Katerina Atkovska, Stefan Kuvendziev, Mrinmoy Garai,
Mirko Marinkovski, Dejan Dimitrovski, Blagoj Pavlovski, Arianit A. Reka,
and Kiril Lisichkov
Abstract The clayey diatomite from the village of Suvodol (Bitola region) used in
this research has shown to be a very effective and efficient natural material for the
removal of Cr(VI) ions from aqueous solutions. The adsorption of Cr(VI) ions onto
a clayey diatomite was shown to occur very efficiently with 96.7%. During the
experiments the effect of operating parameters, such as amount of adsorbent
(0.5–5.5 g/l), initial adsorbate concentration (0.3, 0.4, 0.5, and 0.6 mg/l), and time
of adsorption (5–180 min) at pH of the solution 3, was examined. It was found that
2.5 g/l is optimal adsorbent dosage for maximal removal of Cr(VI) ions. Atomic
absorption spectrophotometric (AAC) method and UV-Vis spectrophotometric
analysis are used for quantitative monitoring of the dynamics of the studied system
regarding the presence of Cr(VI) ions in the model solutions. The effect of the initial
concentration and quantity of adsorbent is examined, in order to determine the conditions that enable maximum removal of Cr(VI) ions with clayey diatomite. For the
purpose of modeling the equilibrium, the kinetics, and dynamics of the tested system of the process of elimination of Cr(VI) ions with the raw material in different
operating conditions, MATLAB/Curve Fitting Toolbox was conducted.
Keywords Adsorption · Equilibrium · Kinetics · Clayey diatomite · Cr(VI) ions
H. Memedi · A. A. Reka (*)
Department of Chemistry, Faculty of Natural Sciences and Mathematics, University of
Tetovo, Tetovo, Republic of North Macedonia
e-mail: arianit.reka@unite.edu.mk
K. Atkovska · S. Kuvendziev · M. Marinkovski · D. Dimitrovski · B. Pavlovski · K. Lisichkov
Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University,
Skopje, Republic of North Macedonia
M. Garai
Materials Science Centre, Indian Institute of Technology (IIT), Kharagpur, India