Effect of dimensions of multi-walled carbon nanotubes on its enrichment efficiency of metal ions from environmental waters

El‐Sheikh, Amjad H.; Sweileh, Jamal A.; Al‐Degs, Yahya S.

doi:10.1016/j.aca.2007.10.009

Cited by 63 publications

(25 citation statements)

References 38 publications

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“…An Analyst 300 Perkin-Elmer atomic absorption spectrometer (Waltham, MA, USA) was used for the quantitative determination of metals under the conditions described elsewhere [42]. In electro-thermal atomic absorption spectrometry ET-AAS, the heating cycles were also similar to those described in a previous work [42].…”

Section: Apparatusmentioning

confidence: 99%

Partially pyrolyzed olive pomace sorbent of high permeability for preconcentration of metals from environmental waters

El‐Sheikh

Sweileh

Saleh

2009

Journal of Hazardous Materials

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Section: Apparatusmentioning

confidence: 99%

Partially pyrolyzed olive pomace sorbent of high permeability for preconcentration of metals from environmental waters

El‐Sheikh

Sweileh

Saleh

2009

Journal of Hazardous Materials

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“…Comparison of the results obtained in this study with some recent studies using multiwalled carbon nanotubes as the solid phase extractor [44][45][46][47][48][49][50][51] was given in Table 5. The validity of the proposed method using a certified reference material proved its application.…”

Section: Resultsmentioning

confidence: 94%

Modification of Gold Nanoparticle Loaded on Activated Carbon with Bis(4-methoxysalicylaldehyde)-1,2-Phenylenediamine as New Sorbent for Enrichment of Some Metal Ions

Karimipour

Ghaedi

Sahraei

et al. 2011

Biol Trace Elem Res

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In this study, a new sorbent based on the gold nanoparticle loaded in activated carbon (Au-NP-AC) was synthesized and modified by bis(4-methoxy salicylaldehyde)-1,2-phenylenediamine (BMSAPD). This sorbent, which is abbreviated as Au-NP-AC-BMSAPD, has been applied for the enrichment and preconcentration of trace amounts of Co(2+), Cu(2+), Ni(2+), Fe(2+), Pb(2+), and Zn(2+) ions in real samples. All metal ions under study were retained on the Au-NP-AC-BMSAPD sorbent by complexation of the ions with the BMSAPD ligand, providing an efficient preconcentration fashion. The retained metal ions were then eluted from the sorbent by HNO(3) and detected by flame atomic absorption spectrometry. The analytical parameters including pH, amount of ligand, and the nature of the eluent and solid phase were evaluated to obtain the optimum condition for the preconcentration factor. Following the optimum conditions, a preconcentration factor of 200 was obtained for all the metal ions under study with detection limits of 1.4-2.6 ng mL(-1). The method has been successfully applied for the extraction and determination of the ion content in the same real samples with recoveries in the range of 95-99.6% and a relative standard deviation lower than 4.0%.

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“…The surface, made up of hexagonal arrays of carbon atoms in graphene sheets, interacts strongly with the benzene ring of aromatic compounds, which make CNTs a promising adsorbent material that may be substituted for activated carbon in many ways. The application of MWCNTs for the preconcentration of heavy metal ions, rare earth elements, and organometallic compounds has been reported in the literature (Munoz et al 2005;Tarley et al 2006;Barbosa et al 2007;El-Sheikh et al 2007).…”

Section: Introductionmentioning

confidence: 97%

Determination of ultra-trace amounts of cadmium by ET-AAS after column preconcentration with a new sorbent of modified MWCNTs

Madadizadeh

Taher

Ashkenani

2012

Environ Monit Assess

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The present research reports on the application of modified multiwalled carbon nanotubes as a new, easily prepared, and stable solid sorbent for the column preconcentration of ultra-trace amounts of cadmium in aqueous solution. Multiwalled carbon nanotubes were oxidized with concentrated HNO3 and modified with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol and then were used as a solid phase for the column preconcentration of Cd(II). Elution was carried out with 0.5 mol L(-1) HNO3. The amount of eluted Cd(II) was measured using electrothermal atomic absorption spectrometry. Various parameters such as pH, sample and eluent flow rate, eluent concentration, breakthrough volume, and interference of a great number of anions and cations on the retention of analyte on sorbent were studied. Under the optimized conditions, the calibration graph was linear in the range of 0.67 ng L(-1) to 5.0 μg L(-1) and the detection limit (3Sb, n = 7) was 0.14 ng L(-1) in initial solution. A preconcentration factor of 300 and relative standard deviations of ± 3.6 % for seven successive determinations of 3 ng of Cd(II) were achieved. The column preconcentration was successfully applied to the analysis of river water, waste water, and Persian Gulf water sample.

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Effect of dimensions of multi-walled carbon nanotubes on its enrichment efficiency of metal ions from environmental waters

Cited by 63 publications

References 38 publications

Partially pyrolyzed olive pomace sorbent of high permeability for preconcentration of metals from environmental waters

Partially pyrolyzed olive pomace sorbent of high permeability for preconcentration of metals from environmental waters

Modification of Gold Nanoparticle Loaded on Activated Carbon with Bis(4-methoxysalicylaldehyde)-1,2-Phenylenediamine as New Sorbent for Enrichment of Some Metal Ions

Determination of ultra-trace amounts of cadmium by ET-AAS after column preconcentration with a new sorbent of modified MWCNTs

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