Extraction of polycyclic aromatic hydrocarbons with a magnetic sorbent composed of alginate, magnetite nanoparticles and multiwalled carbon nanotubes

Bunkoed, Opas; Kanatharana, Proespichaya

doi:10.1007/s00604-015-1484-x

Cited by 51 publications

(19 citation statements)

References 20 publications

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“…An example of an LbL technique used iron oxide nanoparticles and multi-walled carbon nanotubes (MWCNTs), which were incorporated onto calcium alginate beads. MWCNTs ensure there is a large detection surface area, while promoting π interactions with the aromatic rings on PAH samples, obtaining an enhancement of detection limits [92]. Detection of PAHs showed sensitivity in the range of other techniques like optimized surface substrates (limits of detection of 5 ng/L for benzo(a)anthracene and benzo(a)pyrene, and 10 ng/L for benzo(b)fluoranthene, whereas LbL showed typical value 1 × 10 −13 M.…”

Section: Surface Functionalization Techniquesmentioning

confidence: 99%

Future Trends for In Situ Monitoring of Polycyclic Aromatic Hydrocarbons in Water Sources: The Role of Immunosensing Techniques

2019

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Polycyclic aromatic hydrocarbons (PAHs) are hazardous environmental pollutants found in water, soil, and air. Exposure to this family of chemicals presents a danger to human health, and as a result, it is imperative to design methods that are able to detect PAHs in the environment, thus improving the quality of drinking water and agricultural soils. This review presents emerging immunoassay techniques used for in situ detection of PAH in water samples and how they compare to common-place techniques. It will discuss their advantages and disadvantages and why it is required to find new solutions to analyze water samples. These techniques are effective in reducing detection times and complexity of measurements. Immunoassay methods presented here are able to provide in situ analysis of PAH concentrations in a water sample, which can be a great complement to existing laboratory techniques due to their real-time screening and portability for immunoassay techniques. The discussion shows in detail the most relevant state-of-the-art surface functionalization techniques used in the field of immunosensors, with the aim to improve PAH detection capabilities. Specifically, three surface functionalization techniques are key approaches to improve the detection of PAHs, namely, substrate surface reaction, layer-by-layer technique, and redox-active probes. These techniques have shown promising improvements in the detection of PAHs in water samples, since they show a wider linear range and high level of sensitivity compared to traditional PAH detection techniques. This review explores the various methods used in the detection of PAH in water environments. It provides extra knowledge to scientists on the possible solutions that can be used to save time and resources. The combination of the solutions presented here shows great promise in the development of portable solutions that will be able to analyze a sample in a matter of minutes on the field.

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Section: Surface Functionalization Techniquesmentioning

confidence: 99%

Future Trends for In Situ Monitoring of Polycyclic Aromatic Hydrocarbons in Water Sources: The Role of Immunosensing Techniques

2019

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“…In addition, owing to its nano-nature, magnetic nanoparticles possesses large specific surface area, and the equilibrium time between the sorbents and also the sample solutions are thus greatly shortened, and at the end resulting in relatively higher extraction capacity and detection sensitivity. Due to such advantages, MSPE has been widely used in sample preparation [4,5]. Reviews on the analytical application of magnetic materials have been published [6,7].…”

Section: Introductionmentioning

confidence: 99%

Magnetic nanoparticles modified with polyfuran for the extraction of polycyclic aromatic hydrocarbons prior to their determination by gas chromatography

2015

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We describe magnetite nanoparticles modified with polyfuran (PFu/Fe 3 O 4 ) and their use as adsorbents for the solid-phase extraction of the polycyclic aromatic hydrocarbons (PAHs) naphthalene, fluorene and anthracene from water and urine samples. The PFu/Fe 3 O 4 nanocomposite was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and vibrating sample magnetometry (VSM). The adsorbent was magnetically separated from the sample, extracted with dichloromethane, and the extracts were submitted to gas chromatographic analysis with flame ionization detection. The amount of adsorbent, adsorption and desorption time, salt addition and desorption solvent were optimized. The method displays detection limits (at an S/N ratio of 3) in the range from 5 to 20 pg mL −1 , and the limits of quantification (at an S/N ratio of 10) are between 20 and 50 pg mL −1 . Relative standard deviations (RSDs) for intraand inter-day precision are 4.1-5.6, and 5.3-6.5 %, respectively. The feasibility of the method was demonstrated by extracting and determining PAHs in (spiked) real water and urine samples.

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“…SA is widely used as a bioaffinity carrier material, and due to the abundant and easily modified carboxyl and hydroxyl groups on the backbone of the molecule, it was investigated to enhance the adsorption preference of dyes [20,21]. Additionally, SA is sensitive to temperature and pH [22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Magnetic Microspheres with Sodium Alginate and Activated Carbon for Removal of Methylene Blue

et al. 2017

Materials

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Based on the adsorption performance of composite microspheres with activated carbon (AC) and sodium alginate (SA), as well as the magnetic property of Fe3O4, we designed and explored an efficient strategy to prepare a unique, multifunctional Fe3O4/AC/SA composite absorbent (MSA-AC) that extracted dye from aqueous solution. The composite exhibited the following advantages: rapid and simple to prepare, environmentally friendly process, low-cost, recyclability, and multi-functionality. The physicochemical properties of the prepared magnetic microspheres were measured, and methylene blue (MB) was selected to investigate the performance of the magnetic absorbent. The results showed a maximum adsorption capacity of 222.3 mg/g for MB. Adsorption studies revealed that the data of adsorption isotherms and kinetics fit the pseudo-second-order kinetic model and Langmuir isotherm model.

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Extraction of polycyclic aromatic hydrocarbons with a magnetic sorbent composed of alginate, magnetite nanoparticles and multiwalled carbon nanotubes

Cited by 51 publications

References 20 publications

Future Trends for In Situ Monitoring of Polycyclic Aromatic Hydrocarbons in Water Sources: The Role of Immunosensing Techniques

Future Trends for In Situ Monitoring of Polycyclic Aromatic Hydrocarbons in Water Sources: The Role of Immunosensing Techniques

Magnetic nanoparticles modified with polyfuran for the extraction of polycyclic aromatic hydrocarbons prior to their determination by gas chromatography

Synthesis of Magnetic Microspheres with Sodium Alginate and Activated Carbon for Removal of Methylene Blue

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