Aspartic acid-modified magnetic nanoparticles as an ideal sorbent for solid phase extraction of Pb in water samples prior to ICP-OES determination

Falaki, Foujan; Berijani, Sana

doi:10.1080/19443994.2016.1157706

Cited by 9 publications

(2 citation statements)

References 36 publications

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“…The chemical co-precipitation method was used in the preparation of the Fe 3 O 4 NPs with some modifications [16]. At first for preparing a stock solution, 5.4 g of FeCl 3 •6H 2 O and 2.0 g of FeCl 2 •4H 2 O were dissolved in 25 mL of deionized distilled water and 25 mL of 2 M HCl was added to the solution in a beaker.…”

Section: Synthesis Of Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

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Synthesis of SDS micelles-coated Fe3O4/SiO2 magnetic nanoparticles as an excellent adsorbent for facile removal and concentration of crystal violet from natural water samples

2019

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In this research, a simple and rapid method for the separation and preconcentration of trace amounts of crystal violet (CV) from aqueous sample solutions by modified magnetic nano-particles (MNPs) has been developed. The modification of magnetite nanoparticles was conducted by tetra ethoxysilane (TEOS) followed by micelles of anionic surfactant (SDS) to enhance the preconcentration of CV. To characterize the shape and structure of the nanoadsorbent, FT-IR and XRD procedures were used. Also, the average size of the synthesized nanoparticles was achieved between 30 and 40 nm by TEM technique. The effects of some important parameters such as: aqueous solution pH, adsorbent dosage, contact time, temperature and desorption conditions on the separation and concentration of CV were investigated. So, under optimal experimental conditions: aqueous solution pH 6, solution temperature = 20 °C, 7 mg of adsorbent, 1 mL of eluent (0.8 mL of acetonitrile + 0.2 mL of acetic acid), the recovery of CV from river water samples was achieved 98.32 ± 0.056% (n = 5) in two short periods of time for extraction (5 min) and elution (2 min). The maximum sorption capacity of the nano-composite was determined to be 16.37 mg/g. Also linear dynamic range and limit of detection were calculated to be 10-2500 ppb and 1.82 ppb, respectively. Finally, the proposed method was successfully applied for the separation and concentration of CV from the real water samples and the results were satisfied.

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Section: Synthesis Of Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

“…Moreover, by using superparamagnetic nanoparticles (NPs), such as Fe 3 O 4 , a shorter analysis time can be achieved. It is mainly due to their easy isolation by an external magnetic field which is applied outside the extraction container [16].…”

Section: Introductionmentioning

confidence: 99%