Boletus edulis loaded with γ-Fe2O3 nanoparticles as a magnetic sorbent for preconcentration of Co(II) and Sn(II) prior to their determination by ICP-OES

Abstract

The authors show that the fungus Boletus edulis loaded with γ-FeO nanoparticles is a viable sorbent for magnetic solid phase extraction of trace levels of Co(II) and Sn(II). The surface structure of immobilized magnetized B. edulis was characterized by FT-IR, SEM and EDX. Experimental parameters were optimized. Following elution with 1 M HCl, the ions were quantified by ICP-OES. The limits of detection are 21 pg·mL for Co(II), and 19 pg·mL for Sn(II). The preconcentration factors are 100 for both ions. The sorption capacities of the sorbent are 35.8 mg·g for Co(II) and 29.6 mg·g for Sn(II). The method was applied to the analysis of certificated reference materials and gave ≥95% recoveries with low RSDs. It was also successfully applied to the quantification of Co(II) and Sn(II) in spiked environmental and food samples. Graphical abstract The fungus Boletus edulis loaded with γ-FeO nanoparticles is a viable biosorbent for magnetic solid phase extraction (MSPE) of trace levels of Co(II) and Sn(II). The surface structure of immobilized magnetized B. edulis was characterized by FT-IR, SEM and EDX. Experimental parameters were optimized.

Solid phase extraction of trace level Ag(I) using Coriolus versicolor immobilized magnetic nanoparticles and its determination by ICP‐OES

“…This phenomenon can be explained as follows. The increase in the amount of biomass may cause an increase in the electrostatic interactions between the cells to result in an agglomerate, which contributes to the reduction of the present binding sites . Thus, 100 mg of C. versicolor was utilized in all following studies.…”

“…The concentration of the eluent has to be in the possible lowest level to prevent the degradation of the biomass cell wall structure. 27 To determine the most suitable eluent to desorb Ag(I) from the C. versicolor immobilized γ-Fe 2 O 3 NPs column, different concentrations (from 0.5 to 1.0 mol/L) and volumes (from 3.0 to 5.0 ml) of HCl and HNO 3 were evaluated. As can be shown in Table 1, the desorption efficiency for Ag(I) increased with the increase of the HCl and HNO 3 concentrations.…”

Magnetic solid-phase extraction based onCoriolus versicolor-immobilized-Fe2O3nanoparticles for preconcentration and determination of Al(III) in waterand food samples

“…It was used as the biosorbent in this study. Procedures for preparation of biological materials were detailed in our previous study [15].…”

“…Researchers have developed different promising and effective sorbents such as activated carbon, nanocomposites, mesoporous carbon, metal-organic frameworks, biopolymers, and biomaterials based on microorganisms because of their economic advantages and environmentally sensitive properties [15][16][17][18][19]. Coriolus versicolor is one of the most commonly applied wood-rotting fungi due to its different biologically active components and cell wall structures.…”