Solid‐phase preconcentration and determination of mercury(II) using activated carbon in drinking water by X‐ray fluorescence spectrometry

Aranda, Pedro R.; Colombo, Leandro; Perino, Ernesto; Vito, Irma E. De; Raba, Julio

doi:10.1002/xrs.2440

Cited by 42 publications

(33 citation statements)

References 38 publications

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“…Preconcentration factor for Hg(II) on PAni from water was 4 × 10 3 and 1.2 × 10 4 from 0.1 M HCl. A preconcentration factor of 1.7 × 10 3 for Hg(II) from drinking water, on aliquat 336‐activated carbon, for EDXRF determinations has been reported in the literature . It was revealed in the present studies that the preconcentration of Hg(II) on PAni was unaffected by sample volumes up to 1000 ml.…”

Section: Resultssupporting

confidence: 51%

“…A technique requiring minimal sample processing is ideal in such circumstances. The attractive features of energy dispersive X‐ray fluorescence (EDXRF) spectrometry are that it is a non‐destructive technique and solid samples can be directly analyzed . EDXRF, as applied to solid powders, involves the preparation of pressed pellets of both samples and standards, having identical dimensions, in order to ensure reproducibility in quantitative analyses.…”

Section: Introductionmentioning

confidence: 99%

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Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

et al. 2016

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Hg(II) was sorbed on polyaniline from aqueous solutions, followed by determination using energy dispersive X-ray fluorescence spectrometry. Distribution coefficient of Hg(II) on polyaniline was about 4 × 10 3 in water, whereas distribution coefficient was 1.2 × 10 4 at 0.1 M HCl and decreased drastically with increase in HCl concentration. Rapid kinetics of sorption was evinced by the 80% uptake within the initial 1 min and quantitative sorption within 5 min of equilibration. The sorption was found to follow Langmuir isotherm model, and the Langmuir capacity was calculated as 19.7 mg g À1. The ability of polyaniline to form stable and homogeneous pellets facilitated the energy dispersive X-ray fluorescence determination without recourse to elution. Detection limit of Hg was found to be 22 ng, considering 100 mg pellet of polyaniline. The apparent detection limit was 6 pg, as the preconcentration factor of Hg(II) on polyaniline was 4 × 10 3 . The developed method is at par with the established method for mercury determination, namely, cold vapor atomic absorption spectrometry. Accuracy of the method was established by the analysis of the International Atomic Energy Agency reference materials, namely, hair and lichen, for Hg(II).

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Section: Resultssupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

et al. 2016

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“…7). Our findings indicate that although our membrane sensor/captor shows mediated q m value, it may function as an effective and selective adsorbent of ultra-trace Hg(II) ion concentration for all membranes used, such as modified silica, alumina, activated carbon, and synthetic polymers [58][59][60][61][62][63][64][65] (Table 1 and Fig. 7).…”

Section: Hg(ii) Ion-membrane Removal Functionalitymentioning

confidence: 98%

Mesosponge Optical Sinks for Multifunctional Mercury Ion Assessment and Recovery from Water Sources

El‐Safty

Sakai

Selim

et al. 2015

ACS Appl. Mater. Interfaces

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Using the newly developed organic-inorganic colorant membrane is an attractive approach for the optical detection, selective screening and removal, and waste management recovery of highly toxic elements, such as Hg(II) ions, from water sources. In the systematic mesosponge optical sinks (MOSs), anchoring organic colorants into 3D, well-defined cage cavities and interconnected tubular pores (10 nm) in the long microscale channels of membrane scaffolds enhances the requirements and intrinsic properties of the hierarchal membrane. This scalable design is the first to allow control of the multifunctional processes of a membrane in a one-step screening procedure, such as the detection/recognition, removal, and filtration of ultratrace Hg(II) ions, even from actual water sources (i.e., tap, underground). The selective recovery, detection, and extraction processes of Hg(II) ions in a heterogeneous mixture with inorganic cations and anions as well as organic molecules and surfactants are mainly dependent on the structure of the colorant agent, the pH conditions, competitive ion-system compositions and concentrations, and Hg-to-colorant binding events. Our result shows that the solid MOS membrane arrays can be repeatedly recycled and retain their hierarchal mesosponge sink character, avoiding fouling via the precipitation of metal salts as a result of the reuse cycle. The Hg(II) ion rejection and the permeation of nonselective elements based on the membrane filtration protocol may be key considerations in water purification and separation requirements. The selective recovery process of Hg(II) ions in actual contaminated samples collected from tap and underground water sources in Saudi Arabia indicates the practical feasibility of our designed MOS membrane arrays.

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“…Because of the relatively strong binding of Cu 2+ , Co 2+ , Pb 2+ , and Cd 2+ ions to L upon addition to VTA-2 and VTA-3 at a pH values ranging from 7 to 12 even at an equivalent target ion dosage level, these four ions were suppressed using 0.05 M thiourea, NH 4 F, citrate, and tartrate solution. [49][50][51][52][53][54][55][56][57][58] Target ion sensing and adsorption assays of VTA core-shells with repeated reuse cycles were evaluated by measuring their reectance spectra (Fig. This nding reveals that the VTAs may potentially be applied in the determination and removal of target ions in water sources containing wide ranges and high doses of competing specie.…”

Section: Vta Design For Multifunctional Sensing Assays Of Target Ionsmentioning

confidence: 99%

One-pot layer casting-guided synthesis of nanospherical aluminosilica@organosilica@alumina core–shells wrapping colorant dendrites for environmental application

et al. 2015

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A scalable one-pot method has been developed to control the fabrication of heterogeneous mesoporous aluminosilica@organosilica@alumina nanospheres via a layer casting-guided synthesis route. Uniformly spherical onion-like nanoparticle (NP) sizes (approximately 250-300 nm), well-dispersed and heterogeneous active sites throughout the interior core, and concentric double shells are the crucial features of this approach. Wrapping/decoration of dendritic colorant (spine or branch) aggregates into a 10 nm thin-layered crust around the second alumina shell and within the core-double shell cavities afforded a container-like vehicle tracking architecture (VTA) for detecting and recovering toxins (Bi 3+ , Zn 2+ , and Hg 2+ ions) in environmental samples. The heterogeneous VTA design presents potential applicability in pH-dependent optical sensors/extractors for ultra-trace sensing and recovery of multiple toxins from water sources. The processing efficiency of VTA in terms of selective recognition, optical detection, and exclusive capture of the multiple contaminants by using a single VTA depends mainly on the pH. Experimental findings indicate that the resulting VTAs effectively remove >95% of toxins in a one-step process. The hierarchical-core-shell structures remained in the VTA after several reuse cycles.The VTA can potentially satisfy increasing needs for the purification of tap, well, and seawater sources from toxins in Saudi Arabia.Scheme 3 Synthesis of the receptor L, the three-dimensional configuration of L, and the formation and orientation of octahedral [Bi-(L) 3 ] and [Zn-(L) 2 (H 2 O) 2 ] and tetrahedral [Hg-(L) 2 ] complexes upon the addition of water contaminated with Bi 3+ , Zn 2+ , and Hg 2+ at pH values of 4.5, 9, and 10.5, respectively, with a high stabilization energy (E) and stability constant (log K s ). This journal is

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Solid‐phase preconcentration and determination of mercury(II) using activated carbon in drinking water by X‐ray fluorescence spectrometry

Cited by 42 publications

References 38 publications

Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

Mesosponge Optical Sinks for Multifunctional Mercury Ion Assessment and Recovery from Water Sources

One-pot layer casting-guided synthesis of nanospherical aluminosilica@organosilica@alumina core–shells wrapping colorant dendrites for environmental application

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