Visual monitoring and removal of divalent copper, cadmium, and mercury ions from water by using mesoporous cubic Ia3d aluminosilica sensors

Shenashen, Mohamed A.; Elshehy, Emad A.; El‐Safty, Sherif A.; Khairy, Mohamed

doi:10.1016/j.seppur.2013.05.011

Cited by 80 publications

(42 citation statements)

References 57 publications

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“…The detection limit of compound 3 for Hg 2+ ions from LOD=3δ/k equation [where δ is the standard deviation of the blank solution (compound 3 solution) and k is the slope of calibration plot] of fluorescence intensity line to concentration was found to be 3.76×10 −9 M [31][32][33]. This value is lower than the upper limit determined by EPA for potable water [10]. There is a large number of research on rhodamine derivative sensors with 1:1 and 1:2 stoichiometry for Hg 2+ ions.…”

Section: Resultsmentioning

confidence: 80%

“…The color and luminescence of rhodamine derivatives change as a result of the opening of the spirocyclic lactam ring in their structure in acidic pH [30]. Therefore, the fluorescence spectra of compound 3 were saved in the absence and presence of Hg 2+ ions at different pH (2)(3)(4)(5)(6)(7)(8)(9)(10). It was determined that the fluorescence intensity of compound 3 in the absence of Hg 2+ ions was nearly 0 at range of pH=6-10.…”

Section: Resultsmentioning

confidence: 99%

“…High doses of mercury in the human body can cause diseases such as nervous disorders, brain damage, vision and hearing loss [9]. Thus, the highest concentration of mercury in drinking water is set at 2 ppb by the United States Environmental Protection Agency (EPA) [10]. For the determination of mercury conventional methods are used, such as spectrophotometry, atomic absorption spectroscopy (AAS), voltammetry, surface-enhanced Raman scattering (SERS), inductively-coupled plasma mass spectrometry (ICP-MS) and high performance liquid chromotography (HPLC) [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg2+ ions

et al. 2014

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The hexapodal Rhodamine B derivative compound 3 containing a cyclotriphosphazene core was synthesized and characterized by spectroscopic techniques such as FT-IR, (1)H, (13)C and (31)P NMR, HR-MS, MALDI MS and microanalysis. Compound 3 is a naked eye selective sensor with colorimetric and fluorescent properties for Hg(2+) ions in the presence of other metal ions such as Na(+), K(+), Ca(2+), Ba(2+), Mg(2+), Ag(+), Mn(2+), Cu(2+), Ni(2+), Co(2+), Pb(2+), Cd(2+), Zn(2+), Fe(2+), Fe(3+), and Cr(3+). The optical sensor properties of compound 3 were investigated using UV-vis and fluorescence spectroscopy. The lowest detection limit of compound 3 was determined as 3.76 × 10(-9) M (0.75 ppb) for Hg(2+) ions. The stoichiometry of compound 3-Hg(2+) complex was found to be 1:3 (ligand/metal ion). The reusable test strip was improved by the immobilization of compound 3 into a hydrogel network. The reusability of the sensor and test strip was tested with S(2-) ion solutions.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg2+ ions

et al. 2014

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“…Adsorption on organic resins or inorganic oxides is one of the most efficient methods. Inorganic adsorbents are characterized by good selectivity, low price, rapid kinetics, mechanical stability, and no swelling [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Silica Microspheres (HB/A@SI-MNS) for Hafnium and Zirconium Recovery from Zirconyl Leach Liquor

El‐Magied

Salem

Daher

et al. 2018

Colloids and Interfaces

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This work describes the synthesis of silica microspheres using sodium silicate obtained as a byproduct in the production of Egyptian Rosetta zircon concentrate. The obtained mesoporous silica microspheres were further modified with aminopropyltriethoxy silane and 2,4-Dihydroxybenzaldehyde to produce Schiff's base silica sorbent (HB/A@Si-MNS). HB/A@Si-MNS was used for the selective extraction of hafnium from zircon mineral leach liqueur. The fabrication process and surface properties of HB/A@Si-MNS were confirmed by the means of X-ray Fluorescence (XRF), scanning electron microscop (SEM), energy depressive X-ray (EDX), Fourier-transform infrared spectroscopy (FT-IR), and elemental analysis. The uptake behavior of HB/A@Si-MNS towards Zr(IV) and Hf(IV) ions were studied under different experimental conditions. Adsorption curves indicate that the uptake of Zr(IV) and Hf(IV) on HB/A@Si-MNS is a spontaneous, endothermic monolayer system controlled by intraparticle diffusion. Elution efficiencies were found to be 94% and 98% for Zr(IV) and Hf(IV), respectively. The regenerated HB/A@SI-MNS showed uptake capacity comparable to that of fresh ones over 3 cycles. The results of the extraction of Hf(IV) than Zr(IV) from Rosetta zircon concentrate show that HB/A@SI-MNS has a preferential selectivity towards Hf(IV) than Zr(IV). Therefore, the studied material may be promising for the selective separation of Hf(IV) from Zr(IV).

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“…Recent progress has been made in reducing the cost and shortening the time to fabricate optical chemical nanosensors/adsorbents; however, optical adsorbents are still used for specific real-world sensing, extraction, and recovery applications for a wide range of metals [28][29][30][31][32][33][34][35][36] . Recently, research has focused on tailoring specific solid mesoporous monoliths for use as highly sensitive sensors for the simple and simultaneous naked-eye detection and removal of toxic and precious metal ions, such as mercury and gold ions, from aquatic samples [28][29][30][31][32] . Here, a process for selectively detecting and efficiently recovering Au(III) and Pd(II) from the urban mine was reported; additionally, the process can be applied for the recovery of Co(II) ions from LIBs.…”

Section: Introductionmentioning

confidence: 99%

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

El‐Safty

Shenashen

Sakai

et al. 2015

JoVE

Self Cite

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Developing low-cost, efficient processes for recovering and recycling palladium, gold and cobalt metals from urban mine remains a significant challenge in industrialized countries. Here, the development of optical mesosensors/adsorbents (MSAs) for efficient recognition and selective recovery of Pd(II), Au(III), and Co(II) from urban mine was achieved. A simple, general method for preparing MSAs based on using high-order mesoporous monolithic scaffolds was described. Hierarchical cubic Ia 3 d wagon-wheel-shaped MSAs were fabricated by anchoring chelating agents (colorants) into three-dimensional pores and micrometric particle surfaces of the mesoporous monolithic scaffolds. Findings show, for the first time, evidence of controlled optical recognition of Pd(II), Au(III), and Co(II) ions and a highly selective system for recovery of Pd(II) ions (up to ~95%) in ores and industrial wastes. Furthermore, the controlled assessment processes described herein involve evaluation of intrinsic properties ( e.g., visual signal change, long-term stability, adsorption efficiency, extraordinary sensitivity, selectivity, and reusability); thus, expensive, sophisticated instruments are not required. Results show evidence that MSAs will attract worldwide attention as a promising technological means of recovering and recycling palladium, gold and cobalt metals.

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Visual monitoring and removal of divalent copper, cadmium, and mercury ions from water by using mesoporous cubic Ia3d aluminosilica sensors

Cited by 80 publications

References 57 publications

Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg2+ ions

Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg2+ ions

Fabrication of Silica Microspheres (HB/A@SI-MNS) for Hafnium and Zirconium Recovery from Zirconyl Leach Liquor

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

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