Optimization of an anode for arsenic(V) extraction

Valle, M. A. del; Colomer, Diego; Díaz, F. R.; Hernández, L. A.; Antilén, Mónica; Gacitúa, Manuel; Ramos, A.; Arteaga, Gean C.

doi:10.1007/s10800-012-0460-y

Cited by 16 publications

(18 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 2 K log mV/dec at 25ºC) if considering the confidence intervals. In ET applications one of the most important conditions is the need of cross-response of the sensor array [27]. Clear evidence of the presence of cross-sensitivity are the values of slopes obtained; for all ISEs these were greater than 20 mV/dec for two or more of the target ions, except for the Pb 2+ (2) ISE, if considering the confidence intervals.…”

Section: Preliminary Characterizationmentioning

confidence: 88%

Simultaneous Titration of Ternary Mixtures of Pb(II), Cd(II) and Cu(II) with Potentiometric Electronic Tongue Detection

2015

View full text Add to dashboard Cite

An automatic titration method is reported to resolve ternary mixtures of transition metals (Pb 2+ , Cd 2+ and Cu 2+ ) employing electronic tongue detection and a reduced number of pre-defined additions of EDTA titrant. Sensors used were PVC membrane selective electrodes with generic response to heavy-metals, plus an artificial neural network response model. Detection limits obtained were ca. 1 mg·L -1 for the three target ions and reproducibilities 3.0% for Pb 2+ , 4.1% for Cd 2+ and 5.2% for Cu 2+ . The system was applied to contaminated soil samples and high accuracy was obtained for the determination of Pb 2+ . In the determination Cd 2+ and Cu 2+ , sample matrix showed a significant effect.

show abstract

Section: Preliminary Characterizationmentioning

confidence: 88%

Simultaneous Titration of Ternary Mixtures of Pb(II), Cd(II) and Cu(II) with Potentiometric Electronic Tongue Detection

2015

View full text Add to dashboard Cite

show abstract

“…sensors, batteries, fuel cells, photocells, light emitting diodes, etc. makes these materials one of the most studied topics at present [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] . Among these polymers polyaniline, polypyrrole, polythiophene and its derivatives stand out.…”

Section: Introductionmentioning

confidence: 99%

“…To this purpose, it was bore in mind previous results concerning the use of polypyrrole p-doping/undoping for arsenate ion and copper complexes extraction [25][26][27][28][29] , proving that just as p-doping/undoping was suitable for anions removal or extraction, so was n-doping/undoping for cations. Furthermore, in the case of arsenic a sensor was designed to determine this element in its anionic form 30 . n-doping studies revealed that during Hg(II) cation removal, the recorded charge was directly proportional to the metal ion concentration, hence the design and evaluation of the electrode as sensor was proposed.…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

Valle

Llanquileo

Díaz

et al. 2014

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

The electro-synthesis of poly (3,4-ethylenedioxythiophene), PEDOT, has been widely studied due to its different and important applications. Considering that one of the most important electrochemical characteristics of this polymer is its ability to undergo p-and n-doping/undoping, our research group has tested its potential usefulness for cations extraction based on the n-doping/undoping process, hitherto almost unexplored. Therefore, in a first stage, EDOT was electropolymerized on AISI 316 stainless steel, SS, and the SS|PEDOT modified electrode was then obtained. Applying the n-doping potential to these SS|PEDOT electrodes immersed in Hg(II) solution at physiological pH (PBS) it was verified that the cation was incorporated into the polymeric matrix and, depending on the area of the working electrode and removal method (n-doping/undoping), its quantitative extraction was possible. It was also found that the charge recorded during the process is proportional to Hg(II) concentration, hence the assembly is now proposed as sensor for this cation. To this end, in the current paper the amperometric response of the SS|PEDOT electrode toward Hg(II) in PBS, prepared under the optimum conditions previously established and described, was studied. First of all, it is noteworthy establishing that the response obtained with a freshly prepared SS|PEDOT electrode prior to each measurement is highly reproducible. Having this in mind, the modified electrode can be thought as a sensor that may be utilized as a disposable device. Once the electrode response was optimized, analytical parameters were established, namely linear response between 66.6 µmol·L -1 -1.0 mmol·L -1 Hg(II), 1s response time, and quantification and detection limit 10 and 15 µmol·L -1 , respectively. It is possible thus to have at our disposal a suitable and inexpensive sensor that would enable quick and economical quantification of this toxic element using electrochemical methods.

show abstract

“…Thus, electrode modification by these macromolecules using electrochemical techniques, have found numerous applications, e.g. solar cells, 1 sensors, [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] dyes, 17 corrosion protection, 18 optical systems, 19 electro-catalysis, 20 electroanalysis, 21 etc. Because of its already well-known and reported redox couple, 1-amino-9,10-anthraquinone (1AAQ) 10,[22][23][24] ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Electro-oxidation of 1-amino-9,10-anthraquinone and O-phenylenediamine and the Influence of Its Copolymerizaton in the Modified Electrode Properties

et al. 2013

Self Cite

View full text Add to dashboard Cite

Poly(1-amino-9,10-anthraquinone-co-o-phenylenediamine) (P1AAQ-co-POPD) was synthesized by electrochemical methods on stainless steel electrodes (SS) using equal monomer concentration in acetonitrile/acidified water mixture as solvent. Electrochemical characterization allows, among others, determining the characteristic redox couple potential of the quinone group, which is one of the advantages of having achieved the copolymerization. FTRaman, ATR and UV-Vis characterization confirms the formation of the copolymer, particularly, by the occurrence of a novel signal ascribed to a new C-N type bond. Besides, the conductivity of the deposits was determined, which enabled the conducting properties of the products to be verified. The topographical and morphological characterization accomplished by atomic force (AFM) and transmission electron (TEM) microscopy showed how the inclusion of o-phenylenediamine (OPD) increases the homogeneity of the copolymer, which in turn enables designing likely applications of the electrode modified with this novel polymeric material.

show abstract

Optimization of an anode for arsenic(V) extraction

Cited by 16 publications

References 28 publications

Simultaneous Titration of Ternary Mixtures of Pb(II), Cd(II) and Cu(II) with Potentiometric Electronic Tongue Detection

Simultaneous Titration of Ternary Mixtures of Pb(II), Cd(II) and Cu(II) with Potentiometric Electronic Tongue Detection

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

Electro-oxidation of 1-amino-9,10-anthraquinone and O-phenylenediamine and the Influence of Its Copolymerizaton in the Modified Electrode Properties

Contact Info

Product

Resources

About