Spectral Properties and Redox Potentials of Silver Atoms Complexed by Chloride Ions in Aqueous Solution

2000 ◽  
Vol 104 (26) ◽  
pp. 6233-6239 ◽  
Author(s):  
Isabelle Lampre ◽  
Pascal Pernot ◽  
Mehran Mostafavi
Keyword(s):  
Aqueous Solution ◽  
Spectral Properties ◽  
Chloride Ions ◽  
Redox Potentials ◽  
Silver Atoms

Association between Silver and Chloride Ions in Aqueous Solution

1964 ◽  
Vol 68 (8) ◽  
pp. 2372-2374 ◽  
Author(s):  
M. J. Insley ◽  
G. D. Parfitt ◽  
A. L. Smith
Keyword(s):  
Aqueous Solution ◽  
Chloride Ions

scholarly journals Photo-Induced Decomposition of 2-Chloroaniline in Aqueous Solution

2002 ◽  
Vol 57 (5-6) ◽  
pp. 512-515 ◽  
Author(s):  
Ermin Katrin Winarno ◽  
Nikola Getoff
Keyword(s):  
Aqueous Solution ◽  
Degradation Products ◽  
Chloride Ions ◽  
Pure Oxygen ◽  
Ammonium Ions ◽  
Probable Reaction Mechanism ◽  
Specific Analysis ◽  
Probable Reaction ◽  
Uv Dose ◽  
Induced Decomposition

A study was performed on the oxidizing degradation of 2-chloroaniline (used as a model pollutant in water) by photolysis (λ = 254 nm). The change of spectrum and substrate concentration of treated solutions was measured spectrophotometrically as well as by HPLC. The yields of the degradation products (chloride ions, ammonium ions, formaldehyde, etc.) were studied as a function of UV-dose. Their initial quantumyields (Qi) were determined by specific analysis. It was shown that the substrate photolysis in the presence of N2O is most efficient, followed by degradation in media saturated with pure oxygen and air. A probable reaction mechanism for the photo-induced degradation of 2-ClA is presented.

scholarly journals Cement-based materials destruction under the action of deicing salts

2019 ◽  
Vol 298 ◽  
pp. 00053 ◽  
Author(s):  
Ekaterina Potapova ◽  
Ivan Korchunov
Keyword(s):  
Aqueous Solution ◽  
Pore Solution ◽  
Colorimetric Method ◽  
Chloride Ions ◽  
Cement Matrix ◽  
Chloride Solutions ◽  
Deicing Salts ◽  
Cement Based Materials ◽  
Destructive Processes

The results of chloride ions with aqueous solution penetrating into the cement structure were determined with the colorimetric method. Some tendencies of chloride solutions migration in different conditions were established. The article suggests the possible ways of the prevention of destructive processes occur during the excessive pore solution saturation in cement matrix with chloride ions.

scholarly journals Efficient removal of Hg2+, Cd2+ and Pb2+ from aqueous solution and mixed industrial wastewater using a designed chelating ligand, 2-pyridyl-N-(2′-methylthiophenyl) methyleneimine (PMTPM)

2019 ◽  
Vol 79 (6) ◽  
pp. 1092-1101 ◽  
Author(s):  
Krishnendu Kumar Pobi ◽  
Biplab Mondal ◽  
Sumanta Nayek ◽  
Apurba K. Patra ◽  
Rajnarayan Saha
Keyword(s):  
Aqueous Solution ◽  
Industrial Wastewater ◽  
Chelating Agent ◽  
Chloride Ions ◽  
Coordination Geometry ◽  
Reaction Conditions ◽  
X Ray ◽  
Stability Order ◽  
Optimum Reaction

Abstract The present study is focused on the removal of Hg2+, Cd2+ and Pb2+ ions from aqueous solution using a tridentate chelating agent, 2-pyridyl-N-(2′-methylthiophenyl) methyleneimine (PMTPM); and applicability of such removal from industrial wastewater using PMTPM is also investigated. The results showed that the metal ions removal efficiency using PMTPM was in the order of Hg2+(99.46%) > Cd2+(95.42%) > Pb2+(94.54%) under optimum reaction conditions (L:M2+ = 3:1, pH = 9, time = 24 h, temp. = 30 °C). Formed chelated complexes such as [Hg(PMTPM)Cl2] (1), [Cd(PMTPM)Cl2] (2) and [Pb(PMTPM)Cl2] (3) were characterized by numerous spectroscopic tools and X-ray structure determination of a representative complex of Hg2+. In the X-ray structure of [Hg(PMTPM)Cl2], 1, the Hg2+ adopted a distorted tetrahedral coordination geometry surrounding two N donors of PMTPM and two chloride ions. A similar coordination geometry surrounding the respective metal centres in 2 and 3 was established. The thermogravimetric analysis (TGA) revealed a stability order of [Cd(PMTPM)Cl2] > [Hg(PMTPM)Cl2] > [Pb(PMTPM)Cl2]. Further the comparative metal leaching behaviour of these chelate complexes exhibited higher stability in alkaline solution than in acidic. Moreover, PMTPM was applied in real mixed industrial wastewater with alkaline pH, and adequate removals of toxic metals were achieved.

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