Use of Chrysosporium/carbon nanotubes for preconcentration of ultra-trace cadmium levels from various samples after extensive studies on its adsorption properties
Naseri A. Abed Z. Rajabi M. Lal B. Asghari A. Baigenzhenov O. Arghavani-Beydokhti S. Hosseini-Bandegharaei A.
September 2023Elsevier Ltd
Chemosphere
2023#335
Carbon nanotubes were used to immobilize Chrysosporium fungus for building an adequate adsorbent to be used as an desirable sorbent for preconcentration and measurement of cadmium ultra-trace levels in various samples. After characterization, the potential of Chrysosporium/carbon nanotubes for the sorption of Cd(II) ions was scrutinized by the aid of central composite design, and comprehensive studies of sorption equilibrium, kinetics and thermodynamic aspects were accomplished. Then, the composite was utilized for preconcentration of ultra-trace cadmium levels, by a mini-column packed with Chrysosporium/carbon nanotubes, before its determination with ICP-OES. The outcomes vouchsafed that (i) Chrysosporium/carbon nanotube has a high tendency for selective and rapid sorption of cadmium ion, at pH 6.1, and (ii) kinetic, equilibrium, and thermodynamic studies showed a high affinity of the Chrysosporium/carbon nanotubes for cadmium ion. Also, the outcomes displayed that cadmium can quantitatively be sorbed at a flow speed lesser than 7.0 mL/min and a 1.0 M HCl solution (3.0 mL) was sufficient to desorbe the analyte. Eventually, preconcentration and measurement of Cd(II) in different foods and waters were successfully accomplished with good accuracy, high precision (RSDs ≤5.65%), and low limit of detection (0.015 μg/L).
Cd (II) trace analysis , Chrysosporium tropicum , CNTs , Equilibrium , Kinetics , Thermodynamics
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Department of Medical Parasitology and Mycology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
Faculty of Chemistry, Semnan University, Semnan, Iran
Department of Chemistry, Institute of Applied Science and Humanities, GLA University, Mathura, 281406, India
Department of Metallurgical Sciences, Satbayev University, 22a Satbaev Str., Almaty, 050013, Kazakhstan
Department of Medical Parasitology and Mycology
Faculty of Chemistry
Department of Chemistry
Department of Metallurgical Sciences
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