Reversible Colorimetric Probes for Mercury Sensing

Coronado, Eugenio; Galán‐Mascarós, José Ramón; Martí‐Gastaldo, Carlos; Palomares, Emilio; Durrant, James R.; Vilar, Ramón; Grätzel, and Michael; Nazeeruddin, Md. K.

doi:10.1021/ja0517724

Cited by 324 publications

(166 citation statements)

References 63 publications

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“…One of these "colorimetric" sensors is based on the ruthenium dye "N719," [bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium(II) bis(tetrabutylammonium) bis(thiocyanate)]. 9 Mercury ions coordinate reversibly to the sulfur atom of the N-C-S groups on the dye molecule. This interaction causes a color change in the dye at sub-micromolar concentrations of mercury, and this color change is selective for oxidized mercury when compared with other ions such as Pb +2 , Cd +2 , Zn +2 , or Fe +2 .…”

Section: Sensors For Dissolved Oxidized Mercurymentioning

confidence: 99%

Bench-scale Kinetics Study of Mercury Reactions in FGD Liquors

Blythe¹,

Currie²,

DeBerry³

2008

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This document is the final report for Cooperative Agreement DE-FC26-04NT42314, "Kinetics Study of Mercury Reactions in FGD Liquors." The project was co-funded by the U.S. DOE National Energy Technology Laboratory and EPRI. The objective of the project has been to determine the mechanisms and kinetics of the aqueous reactions of mercury absorbed by wet flue gas desulfurization (FGD) systems, and develop a kinetics model to predict mercury reactions in wet FGD systems. The model may be used to determine optimum wet FGD design and operating conditions to maximize mercury capture in wet FGD systems.Initially, a series of bench-top, liquid-phase reactor tests were conducted and mercury species concentrations were measured by UV/visible light spectroscopy to determine reactant and byproduct concentrations over time. Other measurement methods, such as atomic absorption, were used to measure concentrations of vapor-phase elemental mercury, that cannot be measured by UV/visible light spectroscopy.Next, a series of bench-scale wet FGD simulation tests were conducted. Because of the significant effects of sulfite concentration on mercury re-emission rates, new methods were developed for operating and controlling the bench-scale FGD experiments. Approximately 140 bench-scale wet FGD tests were conducted and several unusual and pertinent effects of process chemistry on mercury re-emissions were identified and characterized.These data have been used to develop an empirically adjusted, theoretically based kinetics model to predict mercury species reactions in wet FGD systems. The model has been verified in tests conducted with the bench-scale wet FGD system, where both gas-phase and liquid-phase mercury concentrations were measured to determine if the model accurately predicts the tendency for mercury re-emissions.This report presents and discusses results from the initial laboratory kinetics measurements, the bench-scale wet FGD tests, and the kinetics modeling efforts.v LIST OF TABLES EXECUTIVE SUMMARYThis document is the final report for DOE-NETL Cooperative Agreement DE-FC26-04NT42314, "Bench-scale Kinetics Study of Mercury Reactions in FGD Liquors." In the project, experimental methods were developed initially to use spectrophotometry to identify key reaction intermediate species in the reduction of oxidized mercury to elemental mercury under wet flue gas desulfurization (FGD) conditions, and to track their changes in concentration as the reactions proceeded. Separate but complementary methods for following the rate of evolution of mercury into the gas phase, and loss of mercury from the liquid phase were developed and applied. Using these methods, it has been determined that mercuric sulfite and chlorosulfite complexes form when oxidized mercury is absorbed by FGD systems, and correspondingly decompose to produce elemental mercury re-emissions. The rate of disappearance of the mercuric sulfite and chlorosulfite complexes and the corresponding rate of formation of elemental mercury were monitored by independent...

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Section: Sensors For Dissolved Oxidized Mercurymentioning

confidence: 99%

Bench-scale Kinetics Study of Mercury Reactions in FGD Liquors

Blythe¹,

Currie²,

DeBerry³

2008

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“…To date, several methods providing the optical feedback for the detection of Hg 2+ based upon fluorophores [6][7][8][9][10] chromogenic redox based fluorescent method [11], chromophores [12], polymer [13], and noble metal-based probes [14][15][16][17][18] have been developed. In this regard, among noble-metal nonmaterials, silver nanoparticles (SNPs) have received considerable attention due to their attractive physicochemical properties.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles: Green Synthesis, Characterization, and Their Usage in Determination of Mercury Contamination in Seafoods

Ahmed

Hasan

Shaikh

2014

ISRN Nanotechnology

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We demonstrate that silver nanoparticles undergo an interaction with Hg 2+ found in traces. The PEG-PVP-stabilized Ag nanoparticles were successfully synthesized via a reduction approach and characterized with surface plasmon resonance UV/Vis spectroscopy. By utilizing the redox reaction between Ag nanoparticles and Hg 2+ , and the resulted decrease in UV/Vis signal, we develop a colorimetric method for detection of Hg 2+ ion. A linear and inversely proportional relationship was found between the absorbance intensity of the Ag nanoparticles and the concentration of Hg 2+ ion over the range from 10 ppm to 1 ppm at absorption on 411 nm. The detection limit for Hg 2+ ions in homogeneous aqueous solutions is estimated to be 1 ppm. This system shows excellent selectivity for Hg 2+ . The results found have potential implications in the development of new colorimetric sensors for easy and selective detection and monitoring of mercuric ions in aqueous solutions. The proposed method was successfully applied to quantify the amount of mercury in seafood.

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“…Therefore, monitoring and precise determining of mercuric ion concentration in water and thus in relevant biological matrices are extremely beneficial for the environmental and toxicological monitoring. Despite the increasing efforts for developing low cost methodologies for mercuric detection in aqueous solutions [4][5][6][7][8][9][10][11][12][13][14][15][16], the tailored design of new mercuric-colorimetric chemosensors that work effectively in aqueous media remains a key challenge. Up to now the great effort of researchers in this field is directed toward the development of new selective chemosensors based on fluorescence property [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…This is of course due to many advantages in characterizing this category of chemosensors, at top of which are the high selectivity and sensitivity toward targeted metal ions. Although these fluorometric sensors have been employed enormously in this field, the colorimetric sensing [8,28,[34][35][36] of metal ions has been shown to be less laboursome and intensive alternative to fluorescence techniques. The strong thiophilicity of mercury is the most attractive property that is usually taken into account when designing mercury detection systems, whether they are based on colorimetric or fluorometric spectral changes [35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

A Selective Chemosensor for Mercuric Ions Based on 4-Aminothiophenol-Ruthenium(II) Bis(bipyridine) Complex

Hamid

Al-Khateeb

Tahat

et al. 2011

International Journal of Inorganic Chemistry

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A new ruthenium(II) complex (cis-ruthenium-bis[2,2 -bipyridine]-bis[4-aminothiophenol]-bis[hexafluorophosphate]) has been synthesized and characterized using standard analytical and spectroscopic techniques, FTIR, 1 H and 13 C-NMR, UV/vis, elemental analysis, conductivity measurements, and potentiometric titration. Investigation of the synthesized complex with metal ions showed that this complex has photochemical properties that are selective and sensitive toward the presence of mercuric ion in aqueous solution. The detection limit for mercuric ions using UV/vis spectroscopy was estimated to be ∼ 0.4 ppm. The results presented herein may have an important implication in the development of a spectroscopic selective detection for mercuric ions in aqueous solution.

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Reversible Colorimetric Probes for Mercury Sensing

Cited by 324 publications

References 63 publications

Bench-scale Kinetics Study of Mercury Reactions in FGD Liquors

Bench-scale Kinetics Study of Mercury Reactions in FGD Liquors

Silver Nanoparticles: Green Synthesis, Characterization, and Their Usage in Determination of Mercury Contamination in Seafoods

A Selective Chemosensor for Mercuric Ions Based on 4-Aminothiophenol-Ruthenium(II) Bis(bipyridine) Complex

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