Solid-phase organic synthesis of sensing sorbent materials for copper and lead recovery

Castillo, M.; Pina‐Luis, Georgina; Dı́az-Garcı́a, Marta Elena; Rivero, Ignacio A.

doi:10.1590/s0103-50532005000300015

Cited by 15 publications

(11 citation statements)

References 12 publications

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“…Optimum conditions for adsorption equilibrium for the N-host and DA-host onto each metal were found to be 60 min at pH 6. Selectivity of the N-host and DA-host for the interfering metal ion was evaluated using the following equation (Castillo et al 2005).…”

Section: Adsorption Experiments For Single and Ternary Components Of mentioning

confidence: 99%

Predominant hosting lead(II) in ternary mixtures of heavy metal ions by a novel of diethylaminomethyl-calix[4]resorcinarene

Yusof

Kikuchi

Kobayashi

2013

Int. J. Environ. Sci. Technol.

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Heavy metal ions from single and ternary systems of Pb(II), Cu(II), and Ni(II) adsorbed by calix [4]resorcinarenes in water-chloroform extraction were studied. Comparison was made of calix [4]resorcinarenes, 2,8,14, 20-tetraundecyl calix[4]resorcinarene-4,6,10,12,16,18,22,24-octol, and diethylaminomethyl-calix[4]resorcinarene, 5,11, 17,23-tetra(diethylaminomethyl)-2,8,14,20-tetraundecylcalix[4]resorcinarene-4,6,10,12,16,18,22,24-octol, for predominant extraction of their ions from the ternary mixture of aqueous solution at different pH in a water layer. The hosting of Pb(II) by the diethylaminomethyl-calix[4]resorcinarene occurred efficiently at pH 6-7. The hosting of Pb(II), Cu(II), and Ni(II) ions for the ternary aqueous mixture was applied to the Langmuir isotherm. Adsorption was studied using nuclear magnetic resonance spectroscopy in a water-deuterium chloroform extraction system. Results showed that as the heavy metal ions were included into the host cavity, the observation of shifted peaks of water molecules from downfield to higher field was visible in the nuclear magnetic resonance spectra, meaning that water molecules were included with heavy metal ion into the host cavity. The spectra also showed that the diethylamino group expressed formation of the coordination complex between the diethylaminomethylcalix[4]resorcinarene and Pb(II) for the purpose of predominant hosting of Pb(II).

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Section: Adsorption Experiments For Single and Ternary Components Of mentioning

confidence: 99%

Predominant hosting lead(II) in ternary mixtures of heavy metal ions by a novel of diethylaminomethyl-calix[4]resorcinarene

Yusof

Kikuchi

Kobayashi

2013

Int. J. Environ. Sci. Technol.

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“…Unloaded supports are potential collectors of analytes in the form of a single ion or associated with other species such as complexes. The sorbents in this class include activated carbon [69], natural adsorbents [70], Amberlite XAD resins [71][72][73][74][75], polyethylene [76] and others [77]. Lead can also be complexed with ligands loaded in several supports, such as polyurethane foam [78][79][80], activated carbon [81] and polymeric materials [82][83][84], which make for efficient preconcentration procedures.…”

Section: Solid Phase Extractionmentioning

confidence: 99%

Separation and preconcentration procedures for the determination of lead using spectrometric techniques: A review

Korn

Andrade

Jesus

et al. 2006

Talanta

213

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Lead is recognized worldwide as a poisonous metal. Thus, the determination of this element is often required in environmental, biological, food and geological samples. However, these analyses are difficult because such samples contain relatively low concentrations of lead, which fall below the detection limit of conventional analytical techniques such as flame atomic absorption spectrometry and inductively coupled plasma optical emission spectrometry. Several preconcentration procedures to determine lead have therefore been devised, involving separation techniques such as liquid-liquid extraction, solid phase extraction, coprecipitation and cloud point extraction. Citing 160 references, this paper offers a critical review of preconcentration procedures for determining lead using spectroanalytical techniques.

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“…3,4 These systems could be used for preconcentration and determination of cations in a wide range of samples. [5][6][7] A great advantage of the incorporation is the reduction of leaching of the ligand from the support.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and application of XAD-2/Me-BTAP resin for on-line solid phase extraction and determination of trace metals in biological samples by FAAS

Lemos¹,

David²,

Santos³

2006

J. Braz. Chem. Soc.

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Uma nova resina XAD-2/Me-BTAP foi desenvolvida e aplicada a um sistema em linha para a pré-concentração e determinação de metais por FAAS. O reagente usado na síntese da resina foi o 2-[2´-(6-metil-2´-benzotiazolilazo)-4-aminofenol (Me-BTAP), um composto produzido pela primeira vez para esta aplicação. O reagente e a resina foram caracterizados e o sorvente foi usado como recheio de uma mini-coluna em um sistema de pré-concentração em linha para a determinação de cobalto, cobre e níquel. Os fatores de enriquecimento calculados foram 19 (Co), 12 (Cu) e 12 (Ni), para 60 s de tempo de pré-concentração, e 30 (Co), 30 (Cu) e 24 (Ni), se usados 180 s para a pré-concentração. O procedimento proposto viabilizou a determinação de cobalto, cobre e níquel com limites de detecção de 0,34, 0,87 e 0,81 μg L -1 , respectivamente, quando usados intervalos de pré-concentração de 180 s. A exatidão do procedimento foi avaliada através da análise de materiais de referência certificados. O método foi aplicado à análise de amostras de alimentos (chá preto e farinha de arroz).A new XAD-2/Me-BTAP resin has been developed and applied in an on-line system for the preconcentration followed by metal determination by FAAS. The reagent used in the resin synthesis was 2-[2´-(6-methyl-benzothiazolylazo)]-4-aminophenol (Me-BTAP), a compound produced by first time for the application described in this work. The reagent and resin were characterized and the sorbent was used as packing for the minicolumn in an on-line system preconcentration system for cobalt, copper and nickel determination. The enrichment factors calculated were 19 (Co), 12 (Cu) and 12 (Ni), for 60 s preconcentration time, and 30 (Co), 30 (Cu) and 24 (Ni), if used 180 s preconcentration time. The proposed procedure allowed the determination of cobalt, copper and nickel with limits of detection 0.34, 0.87 and 0.81 μg L -1 , respectively, when used preconcentration periods of 180 s. The accuracy of the developed procedure was evaluated by the analysis of certified reference materials. The method was applied to the analysis of food samples (black tea and rice flour).

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Solid-phase organic synthesis of sensing sorbent materials for copper and lead recovery

Cited by 15 publications

References 12 publications

Predominant hosting lead(II) in ternary mixtures of heavy metal ions by a novel of diethylaminomethyl-calix[4]resorcinarene

Predominant hosting lead(II) in ternary mixtures of heavy metal ions by a novel of diethylaminomethyl-calix[4]resorcinarene

Separation and preconcentration procedures for the determination of lead using spectrometric techniques: A review

Synthesis and application of XAD-2/Me-BTAP resin for on-line solid phase extraction and determination of trace metals in biological samples by FAAS

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