A polarographic investigation on interactions between cu(ii) ions and natural degradation products of a herbicide atrazine

Abstract

A study was performed to investigate the possible formation of coordination compounds between Cu(II), Cd(II), Zn(I1). and Pb(I1) ions and natural degradation products of atrazine (ATR) desisopropylatrazine (DL4): desethylatrazine (DU). and desethyldesisopropylatrazine (DEIA). as well as parent compound ,4TR itself and the related s-triazine herbicide prometnne (PRO). By using polarographic and voltammetric titrations of a metal ion with a ligand and vice versa, at mercun drop or plain carbon paste electrode. only a formation of coordination compounds involving Cu(I1) ions. of a type CuL2 (L = DW, DL4, and PRO) and CuL (L = DEN) in aqueous solutions at pHs above 4, were obsen7ed. By applying an indirect polarographic method with ligand exchange (EDTA), a conditional stability constant of CuDEL4 was determined. and the value @;lunELI = 12.-was obtained.

Uptake of Atrazine and Cadmium from Soil by Maize (Zea mays L.) in Association with the Arbuscular Mycorrhizal Fungus Glomus etunicatum

“…This finding presumably resulted from the constrained transport of ATR in the presence of Cd. ATR contains electron-donor atoms and may form a metal−ATR complex with Cd ( , ), which might be taken up less than ATR or Cd individually. In a colonized plant more Cd and ATR could be sequestered in the root systems by binding to mycelium or adsorption on the roots ( , ).…”

Catalytic effect of transition metals on microwave-induced degradation of atrazine in mineral micropores

“…Displacement of the loosely bound water from the hydrophobic micropore space was believed to be the major mechanism of atrazine sorption on microporous minerals (Cheng and Reinhard, 2007;Hu et al, 2012;Hu and Cheng, 2013a). Due to the presence of heteroatom (N) with free electron pairs and aromatic ring with delocalized p electrons, atrazine molecules have relatively strong interactions with transition metals, such as copper, and form the corresponding complexes (Decock et al, 1985;Grabec et al, 1994). As a result, atrazine could adsorb more strongly on Cu/CBV-720 than on CBV-720.…”

Determination of conditional stability constants for some divalent transition metal ion‐EDTA complexes by electrospray ionization mass spectrometry

“…In determinations of the conditional stability constants between different metal ions and ligands, analytical methods such as potentiometry, calorimetry, polarography, spectrophotometry, and 1H NMR have been applied. It is not unusual that combinations of analytical methods are used in the determination of conditional stability constants for a complex .…”

“…[1,[4][5][6][7][8] When the solution conditions, for example, pH, ionic strength, and temperature are changed, the complex formation capacity of the ligand is altered, which leads to a change in the magnitude of the stability constant. [1] In determinations of the conditional stability constants between different metal ions and ligands, analytical methods such as potentiometry, [9][10][11][12][13][14] calorimetry, [15][16][17][18] polarography, [12,[19][20][21] spectrophotometry, [13,14,22,23] and 1H NMR [14] have been applied. It is not unusual that combinations of analytical methods are used in the determination of conditional stability constants for a complex.…”