Study on soluble heavy metals with preconcentration by using a new modified oligosilsesquioxane sorbent

Vieira, Evanice Menezes Marçal; Soares, Isaac V.; Filho, Newton Luiz Dias; Silva, Niléia C. da; Perujo, Sérgio Daniel; Bastos, Andréa C.; Garcia, Edemir F.; Ferreira, Tamires T.; Fraceto, Leonardo Fernandes; Rosa, André Henrique

doi:10.1016/j.jhazmat.2012.08.030

Cited by 25 publications

(10 citation statements)

References 41 publications

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“…Various techniques have been developed to remove toxic heavy metal from effluent, such as sedimentation, ion exchange, membrane filtration, electrodialysis, and reverse osmosis. However, the aforementioned techniques are effective only for treating high concentrations of heavy metal ions (more than 100 mg/L) with high energy input (Vieira et al, 2012;Hossain et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Sulfonated modification of cotton linter and its application as adsorbent for high-efficiency removal of lead(II) in effluent

Dong

Zhang²,

Pang³

et al. 2013

Bioresource Technology

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Section: Introductionmentioning

confidence: 99%

Sulfonated modification of cotton linter and its application as adsorbent for high-efficiency removal of lead(II) in effluent

Dong

Zhang²,

Pang³

et al. 2013

Bioresource Technology

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“…[46][47][48][49] World Health Organization / Food and Agriculture Organization [40] 0.30 5.0 [41] Solid phase extraction with gallic acidmodified silica gel 100-200 0. 65-0.58 [42] Coprecipitation with copper(II)-rubeanic acid 25-50 0.58-3.4 [43] Solid phase extraction with oligosilsesquioxane sorbent based on Nanosilicate -0.41-0.47 [44] Coprecipitation 50 0.34-0.87 [45] Solidified floating organic drop microextraction -electrothermal vaporization -inductively coupled plasma mass spectrometry 20-324 0.0020-0.0170 [46] Single solidified floating organic drop …”

Section: Discussionmentioning

confidence: 99%

“…The presented novel microextraction showed a relatively high enrichment factor and low detection limit compared with reports in the literature. [43][44][45][46][47][48][49] …”

Section: Comparison With Other Preconcentration Techniquesmentioning

confidence: 99%

Determination of Cadmium and Lead in Water and Food by Organic Drop Microextraction and Flame Atomic Absorption Spectrometry

Jalbani

Soylak

2015

Instrumentation Science & Technology

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Single solidified floating organic drop microextraction was used for the preconcentration and determination of Cd(II) and Pb(II). The procedure employed 1-(2-pyridylazo)-2-naphthol as a chelating agent, 1-undecanol as the extractant solvent, and methanol was as the dispersive solvent. Factors influencing the recovery of Cd(II) and Pb(II) such as the pH, volume of extractant, volume of ligand, volume of dispersant, and stirring time were optimized by Plackett Burman design. In order to complete the optimization, a central 2 3 +star orthogonal composite design was applied. The limits of detection for Cd(II) and Pb(II) were 0.15 and 0.52 µg L -1 . The validation of procedure was evaluated by the analysis of TMDA 70 Fortified Water and NCSDC-73349 Bush Branches certified reference materials. The determined values were in good agreement with the certified values. The single solidified floating organic drop microextraction method was employed for the determination of cadmium and lead in water, vegetables, and fruit.

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“…The relative standard deviations for determination of 50 ng/mL of Pb (II) and Cu (II) ions in 250 mL of water were 1.08 and 1.64% (n 5 6), respectively. In Table 2, the analytical features of the proposed are compared with some of the recently presented SPE methods for metal analysis (Ghanemi et al 2011;Cheng et al 2012;Vieira et al 2012;Urus¸et al 2013;Mirabi et al 2015;Khan et al 2016). It can be concluded that the analytical merits of the method are comparable or better than the other SPE methods presented in literature, but it offers a straightforward procedure for the nano-adsorbent preparation as well as a simple extraction method.…”

Section: Analytical Performancementioning

confidence: 95%

Graphene oxide nanosheets modified with trithiocyanuric acid for extraction and enrichment of Pb (II) and Cu (II) ions in seawater

Mosavi

Ghanemi

Nickpour

2018

Water & Environment J

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Trithiocyanuric acid (TTC) is a robust chelating ligand for extracting divalent and univalent heavy metals from water samples. In this method, graphene oxide nanosheets (GO) was modified with TTC, to produce a new nano‐adsorbent (GO‐TTC), for extraction and preconcentration of Pb (II) and Cu (II) ions from seawater samples. The concentrated analytes were measured by a flame atomic absorption spectrometry. The detection limits of the method for Pb (II) and Cu (II) ions were 0.32 ng/mL and 0.13 ng/mL, respectively. The relative standard deviations of analytes for six successive extractions were below 1.64%. The maximum adsorption capacity of GO‐TTC for Pb (II) and Cu (II) ions was 750 µg/g and 460 µg/g, respectively. The recoveries of the spiked analytes in artificial and natural seawater samples were above 90%, pointing out that the method is not affected by the major coexisting ions in seawater matrices.

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Study on soluble heavy metals with preconcentration by using a new modified oligosilsesquioxane sorbent

Cited by 25 publications

References 41 publications

Sulfonated modification of cotton linter and its application as adsorbent for high-efficiency removal of lead(II) in effluent

Sulfonated modification of cotton linter and its application as adsorbent for high-efficiency removal of lead(II) in effluent

Determination of Cadmium and Lead in Water and Food by Organic Drop Microextraction and Flame Atomic Absorption Spectrometry

Graphene oxide nanosheets modified with trithiocyanuric acid for extraction and enrichment of Pb (II) and Cu (II) ions in seawater

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