Dissolvable layered double hydroxide as an efficient nanosorbent for centrifugeless air-agitated dispersive solid-phase extraction of potentially toxic metal ions from bio-fluid samples

Rajabi, Maryam; Arghavani-Beydokhti, Somayeh; Barfi, Behruz; Asghari, Alireza

doi:10.1016/j.aca.2016.12.041

Cited by 65 publications

(12 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In metallurgy, mining, and biology, a common reactor is the mixer capable of mixing various raw materials. To capture the mixing properties and optimize the structure of the mixer, it is necessary to deeply examine the mixing and flow features of the solid-liquid two phase in the mixing cylinder [1][2][3][4]. The existing measuring devices for flow field features are troubled by three defects: the devices are too small, the measuring error is high due to the empirical formula, and the detail features are not described clearly [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Fluid Flow Features of Mechanical Mixer with Automatic Variable Frequency Control

Yang¹

2021

IJHT

View full text Add to dashboard Cite

For many engineering fields, it is of practical significance to construct and reasonably simplify the solid-liquid two-phase flow model in the cylinder of mechanical mixer. However, the existing studies have not considered how the control technology affects the fluid features in the mixer. From the angle of automatic variable frequency control, this paper carries out a numerical simulation of the fluid flow features in mechanical mixer. Firstly, the authors constructed the system structure for the mixer with automatic variable frequency control, and summarized the basic devices and the number of input/output points of the system. Then, the relationship between the force energy and control frequency of the mixing cylinder was detailed. Afterwards, the Euler-Euler two fluid model was introduced to numerically simulate the solid-liquid two-phase flow in the cylinder of the mixer, which contains both solid particles and liquid, followed by the establishment of control equation, the drag model, and the turbulence model. The proposed model was proved effective through experiments. The research findings provide a reference for the relevant research and the optimal design of the drive module of mixers.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Fluid Flow Features of Mechanical Mixer with Automatic Variable Frequency Control

Yang¹

2021

IJHT

View full text Add to dashboard Cite

show abstract

“…A unique feature of LDHs is that they are dissolvable in acidic solution (pH < 4). Therefore, after extraction analyte‐enriched LDHs can be dissolved using acidic solution and the analytes can be released into the solution . In this way, the analyte elution step for conventional DMSPE was omitted and thus the use of organic solvents was avoided.…”

Section: Introductionmentioning

confidence: 99%

Dissolvable layered double hydroxide as a sorbent in dispersive micro‐solid phase extraction for the determination of acidic quinolones in honey by HPLC

Wang

Liu

et al. 2019

J of Separation Science

View full text Add to dashboard Cite

This study presents a simple and green dispersive micro-solid phase extraction method for preconcentration of acidic quinolones from honey prior to high performance liquid chromatography determination. A two-dimensional nanostructured zinc-aluminum layered double hydroxide was synthesized and used as the sorbent for dispersive micro-solid phase extraction. Its different characteristics from conventional sorbents is that it is dissolvable in acidic solution (pH < 4). After the extraction, the analyte elution step was omitted and thus the use of organic solvents was avoided. The key parameters influencing the extraction efficiency such as the amount of sorbent, pH of sample solution, vortex time, type and volume of acidic solution were investigated and optimized. The method exhibited low limits of detection (3.0−5.0 ng/g), good linearity (10−2000 ng/g) with coefficients of determinations higher than 0.9991, acceptable precision (RSD<9.1%) and accuracy (RE<5.8%). The proposed method is fast, efficient, eco-friendly, and suitable for the determination of acidic quinolones in honey samples. K E Y W O R D Sacidic quinolones, dispersive micro-solid phase extraction, honey, layered double hydroxide

show abstract

“…Therefore, discharging industrial effluents into the hydrosphere before their treatment can be dangerous for the environment . Hence, monitoring extremely low levels of these pollutants in environmental and biological samples is of great significance to ensure the quality of human health and environmental pollution control …”

Section: Introductionmentioning

confidence: 99%

Dissolvable layered double hydroxide nanoadsorbent‐based dispersive solid‐phase extraction for highly efficient and eco‐friendly simultaneous microextraction of two toxic metal cations and two anionic azo dyes in real samples

Arghavani-Beydokhti

Rajabi

Asghari

2018

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

For the first time, a new mode of dispersive solid-phase extraction is presented as a simple, rapid, adsorbent-free and environmentally friendly method for the simultaneous microextraction and preconcentration of trace amounts of two metal ions (Pb 2+ and Cr 3+ ) and two anionic azo dyes (reactive yellow 15 (RY15) and reactive black 5 (RB5)). This method is based upon the in situ formation of a layered double hydroxide (LDH) nanosorbent through an electrostatic induction process. In this method, extraction of the analytes is performed simultaneously with the formation of the nanosorbent only by adding hydroxide ions. After extraction and separation of the sorbent from the sample solution through a syringe nanofilter, the analytes are eluted by dissolving the LDHs in an acidic solution. Finally, the extracted metal cations and anionic azo dyes are directly determined by micro-sampling flame atomic absorption spectrometry and micro-volume UV-visible spectrophotometry, respectively. Under the optimal experimental conditions including 20 μmol of hydroxide ions, 248.4:20.8 μg l −1 of M 2+ :M 3+ ions, 12 cycles of air agitation and 200 μl of CF 3 COOH (2 M), good linearities were obtained for Pb 2+ , Cr 3+ , RY15 and RB5 in the concentration ranges 50-600, 5.0-280, 30-2500 and 30-2000 ng ml −1 , respectively, with correlation of determinations higher than 0.995. The preconcentration factor for the target analytes was 50 in a 10 ml sample solution. The limits of detection were found to be 15, 1.5, 10 and 10 μg l −1 for Pb 2+ , Cr 3+ , RY15 and RB5, respectively. The intra-day and inter-day precisions were in the ranges 4.3-6.1 and 5.5-6.8%, respectively. Additionally, the presented method is applicable for the analysis of the target analytes in different water samples with reasonable recoveries (>87%). KEYWORDSin situ formation, layered double hydroxide, micro-sampling flame atomic absorption spectrometry, micro-volume UV-visible spectrophotometry, real samples

show abstract

Dissolvable layered double hydroxide as an efficient nanosorbent for centrifugeless air-agitated dispersive solid-phase extraction of potentially toxic metal ions from bio-fluid samples

Cited by 65 publications

References 38 publications

Numerical Simulation of Fluid Flow Features of Mechanical Mixer with Automatic Variable Frequency Control

Numerical Simulation of Fluid Flow Features of Mechanical Mixer with Automatic Variable Frequency Control

Dissolvable layered double hydroxide as a sorbent in dispersive micro‐solid phase extraction for the determination of acidic quinolones in honey by HPLC

Dissolvable layered double hydroxide nanoadsorbent‐based dispersive solid‐phase extraction for highly efficient and eco‐friendly simultaneous microextraction of two toxic metal cations and two anionic azo dyes in real samples

Contact Info

Product

Resources

About