Solid-phase microextraction of heavy metals in natural water with a polypyrrole/carbon nanotube/1, 10–phenanthroline composite sorbent material

Rohanifar, Ahmad; Rodriguez, Lidia B.; Devasurendra, Amila M.; Alipourasiabi, Niloofar; Anderson, Jared L.; Kirchhoff, Jon R.

doi:10.1016/j.talanta.2018.05.100

Cited by 76 publications

(27 citation statements)

References 53 publications

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“…Some of the limitations found with nanosorbent materials have been addressed by employing specially designed sorbent materials based on chelating resins [129][130][131][132], polymers with chelating units [133,134], ion imprinted polymers [135][136][137][138], and polymeric ionic liquids [135,139,140].…”

Section: Polymer-based Materialsmentioning

confidence: 99%

“…Twenty-two elements, including titanium, iron, cobalt, nickel, copper, gallium, cadmium, tin, and rare earth elements, were extracted prior to ICP-MS analysis with extraction efficiencies higher than 80%. Rohanifar et al developed a versatile, easily tunable, cost-effective, greener approach for SPME of heavy metals from natural waters [133]. In this study, pencil lead was used as a substrate as an alternative to a commercially available SPME fiber or a metal wire, which significantly reduced the cost.…”

Section: Solid-phase Microextractionmentioning

confidence: 99%

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Evolution of Environmentally Friendly Strategies for Metal Extraction

et al. 2020

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The demand for the recovery of valuable metals and the need to understand the impact of heavy metals in the environment on human and aquatic life has led to the development of new methods for the extraction, recovery, and analysis of metal ions. With special emphasis on environmentally friendly approaches, efforts have been made to consider strategies that minimize the use of organic solvents, apply micromethodology, limit waste, reduce costs, are safe, and utilize benign or reusable materials. This review discusses recent developments in liquid- and solid-phase extraction techniques. Liquid-based methods include advances in the application of aqueous two- and three-phase systems, liquid membranes, and cloud point extraction. Recent progress in exploiting new sorbent materials for solid-phase extraction (SPE), solid-phase microextraction (SPME), and bulk extractions will also be discussed.

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Section: Polymer-based Materialsmentioning

confidence: 99%

Section: Solid-phase Microextractionmentioning

confidence: 99%

Evolution of Environmentally Friendly Strategies for Metal Extraction

et al. 2020

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“…After the adsorption of the metal onto the adsorbents, the next step should be the recovery of the metal from the adsorbent for a final recovery or dumping step. This desorption step, also called the elution step, is of equal importance as the adsorption step [20], though it is sometimes neglected by authors in their publications, i.e., References [2,7,12,21,22].…”

Section: Elutionmentioning

confidence: 99%

Adsorption of Gold(I) and Gold(III) Using Multiwalled Carbon Nanotubes

Alguacil

2018

Applied Sciences

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Carbon nanotubes are materials that have been investigated for diverse applications including the adsorption of metals. However, scarce literature has described their behavior in the case of the adsorption of precious metals. Thus, this work reports the efficient adsorption of gold from cyanide or chloride media on multiwalled carbon nanotubes (MWCNTs). In a cyanide medium, gold was adsorbed from alkaline pH values decreasing the adsorption as the pH values were increased to more acidic values. In a chloride medium, the MWCNTs were able to load the precious metal and an increased HCl concentration (0.1–10 M), in the aqueous solution, had no effect on the gold uptake onto the nanotubes. From both aqueous media, the metal adsorption was well represented by the pseudo-second order kinetic model. In the cyanide medium, the film-diffusion controlled process best fitted the rate law governing the adsorption of gold onto the nanotubes, whereas in the chloride medium, the adsorption of the metal onto the nanotubes is best represented, both at 20 °C and 60 °C, by the particle-diffusion controlled process. With respect to the elution step, in cyanide medium gold loaded onto the nanotubes can be eluted with acidic thiourea solutions, whereas in the chloride medium, and due to that the adsorption process involved the precipitation of zero valent gold onto the multiwalled carbon nanotubes, the elution has been considered as a leaching step with aqua regia. From the eluates, dissolved gold can be conveniently precipitated as zero valent gold nanoparticles.

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“…The recovery of spiked Pb in the case of the sorbent with aminosilanized Fe 3 O 4 was in the range of 75 to 110%. From the analytical data, the preconcentration technique was found to be useful for the determination of trace lead in environmental waters.ChemEngineering 2019, 3, 74 2 of 10 (CPE) [10], solid-phase extraction (SPE) [11][12][13], and magnetic solid-phase extraction (MSPE) have been performed [14,15].Nowadays, magnetic particles containing maghemite (γ-Fe 2 O 3 ) and magnetite (Fe 3 O 4 ) are employed as excellent novel adsorbents, owing to their inimitable advantages relative to general micro-size adsorbents; they have strong supermagnetic characters that can match the need of rapid adsorption from large volume water samples by using strong external magnetic parts [16]. Recently, MSPE has been intensively used for environmental analysis at low concentrations.…”

mentioning

confidence: 99%

“…ChemEngineering 2019, 3, 74 2 of 10 (CPE) [10], solid-phase extraction (SPE) [11][12][13], and magnetic solid-phase extraction (MSPE) have been performed [14,15].…”

mentioning

confidence: 99%

Preconcentration of Pb with Aminosilanized Fe3O4 Nanopowders in Environmental Water Followed by Electrothermal Atomic Absorption Spectrometric Determination

et al. 2019

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A new preconcentration method to determine lead in environmental waters using the aminosilanized magnetite Fe3O4 powder sorbent has been developed. The preconcentration method was combined with electrothermal atomization atomic absorption spectrometry (ETAAS) and a graphite atomizer. Trace amount of sorbent (3 mg) could be applied into the preconcentration of Pb. According the preconcentration, the detection limits were 14 and 19 pg·mL−1 with bare and aminosilanized Fe3O4, respectively. The effect of interferent elements such as Al, Ca, Co, Fe, K, Mg, Na, Ni, and Zn (1000 ng·mL−1 versus Pb 1 ng·mL−1) on the preconcentration of Pb using bare magnetite was evaluated, and some elements (Al, Ni, and Zn) were found to interfere with the Pb preconcentration. The aminosilanized Fe3O4 sorbent was found to be effective in eliminating the severe interferences. The enrichment factors were 34 for the preconcentration with aminosilanized Fe3O4. The recovery of spiked Pb in the case of the sorbent with aminosilanized Fe3O4 was in the range of 75 to 110%. From the analytical data, the preconcentration technique was found to be useful for the determination of trace lead in environmental waters.

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Solid-phase microextraction of heavy metals in natural water with a polypyrrole/carbon nanotube/1, 10–phenanthroline composite sorbent material

Cited by 76 publications

References 53 publications

Evolution of Environmentally Friendly Strategies for Metal Extraction

Evolution of Environmentally Friendly Strategies for Metal Extraction

Adsorption of Gold(I) and Gold(III) Using Multiwalled Carbon Nanotubes

Preconcentration of Pb with Aminosilanized Fe3O4 Nanopowders in Environmental Water Followed by Electrothermal Atomic Absorption Spectrometric Determination

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