Modified Electrodes Based on Poly[(2E)-2-(Azulen-1-ylmethylidene)hydrazinecarbothioamide] for Heavy Metal Ions Complexation

2016 ◽  
Vol 29 (1) ◽  
pp. 93-102 ◽  
Author(s):  
George-Octavian Buica ◽  
Liviu Birzan ◽  
Victorita Tecuceanu ◽  
Alexandru C. Razus ◽  
Georgiana-Luiza Arnold ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Modified Electrodes

Nanometer Materials Modified Electrodes for Detection of Heavy Metal Ions by Stripping Voltammetry

2014 ◽  
Vol 488-489 ◽  
pp. 129-132 ◽  
Author(s):  
Jun Wu ◽  
Li Ning Yang ◽  
Na Song ◽  
Jian Rong Chen
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Method ◽  
Heavy Metal Ions ◽  
Modified Electrodes ◽  
High Sensitivity ◽  
Stripping Voltammetry ◽  
Good Method ◽  
Nanometer Materials ◽  
Pollution Events

More and more heavy metal ions pollution events happen nowadays, so how to detect and remove heavy metal ions is a very important problem. Electrochemical method is relatively simple device, convenient automatic operation. Because of its high sensitivity and good selectivity, it becomes a good method to detect heavy metal ions. This paper summarized the detection of heavy metal ions by stripping voltammetry.

scholarly journals DFT calculations and electrochemical studies on azulene ligands for heavy metal ions detection using chemically modified electrodes

2018 ◽  
Vol 8 (1) ◽  
pp. 73-85
Author(s):  
Amalia Stefaniu ◽  
Maria-Daniela Pop ◽  
Georgiana-Luiza Arnold ◽  
Liviu Birzan ◽  
Lucia Pintilie ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Density Functional ◽  
Computational Study ◽  
Modified Electrodes ◽  
Chemically Modified Electrodes ◽  
Point Energy ◽  
Chemically Modified ◽  
Oxidation Potentials

A computational study on three related derivatives of 5-[(azulen-1-yl)methylene]-2-thioxoimidazolidin-4-one was conducted using density functional theory by calculating a series of molecular descriptors and properties of their optimized geometries (electrostatic and local ionization potentials, molecular frontier orbitals, etc.). Thermodynamic properties (zero-point energy, enthalpy, constant volume heat capacity, entropy and Gibbs energy) for these derivatives have been calculated and related to ligands electrochemical behavior. Reduction and oxidation potentials have been correlated to their calculated energy levels for LUMO and HOMO orbitals. Chemically modified electrodes based on these derivatives have been tested in view of heavy metal ions recognition, and their detection limits have been correlated to the calculated values of electron affinity.

Detection of Trace Heavy Metal Ions Using Carbon Nanotube- Modified Electrodes

2009 ◽  
Vol 21 (14) ◽  
pp. 1597-1603 ◽  
Author(s):  
Jeffrey Morton ◽  
Nathaniel Havens ◽  
Amos Mugweru ◽  
Adam K. Wanekaya
Keyword(s):  
Heavy Metal ◽  
Carbon Nanotube ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Modified Electrodes

scholarly journals Recognition of Heavy Metal Ions by Using E-5-((5-Isopropyl-3,8-Dimethylazulen-1-yl) Dyazenyl)-1H-Tetrazole Modified Electrodes

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 644
Author(s):  
Adina-Maria Păun ◽  
Ovidiu-Teodor Matica ◽  
Veronica Anăstăsoaie ◽  
Laura-Bianca Enache ◽  
Elena Diacu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Film Formation ◽  
Modified Electrodes ◽  
Rotating Disk ◽  
Differential Pulse ◽  
Rotating Disk Electrode ◽  
Polymeric Films ◽  
Rotating Disk Electrode Voltammetry

Chemically modified electrodes (CMEs) based on polymeric films of E-5-((5-isopropyl-3,8-dimethylazulen-1-yl) diazenyl)-1H-tetrazole (L) deposited on the surface of the glassy carbon electrode have been used for the recognition of heavy metal (Me) ions. The electrochemical study of L was done by three methods: differential pulse voltammetry (DPV), cyclic voltammetry (CV), and rotating disk electrode voltammetry (RDE). The CV, DPV, and RDE studies for L were performed at different concentrations in 0.1 M tetrabutylammonium perchlorate solutions in acetonitrile. The polymeric films were formed by successive cycling or by controlled potential electrolysis (CPE). The film formation was proven by recording the CV curves of the CMEs in ferrocene solution. The CMEs prepared at different charges or potentials were used for detection of heavy metal ions. Synthetic samples of heavy metal ions (Cd(II), Pb(II), Cu(II), Hg(II)) of concentrations between 10−8 and 10−4 M were analyzed. The most intense signal was obtained for Pb(II) ion (detection limit of about 10−8 M). Pb(II) ion can be detected by these CMEs in waters at such concentrations. The ability of the ligand L to form complexes with Pb(II) and Hg(II) ions was also tested by UV-Vis spectrometry. The obtained results showed the formation of Me(II)L2 complexes.

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