Thermal studies on cobalt(II), nickel(II) and copper(II) complexes of Schiff base derived from salicylaldehyde and glycine

Effective Removal and Resource Recovery for Heavy Metal–Organic Complex-Polluted Water via an Integrated Decomplexation–Degradation–Immobilization Pathway

“…As a typical class of dissolved organic matter (DOM), amino acids, widely distributed in natural and industrial water environments, can easily coordinate with heavy metal ions to form heavy metal–organic complexes. ,− Among all of the different amino acids, glycine is a representative amino acid that can quickly react with heavy metal ions in various water environments to form stable heavy metal–glycinate complexes such as the copper glycinate complex (CuGly). ,, Compared to the free heavy metal ions, most heavy metal–organic complexes are present in water with high solubility and good stability over a broad range of pH. ,,, These lead to difficulty in the removal of heavy metal–organic complexes via conventional biodegradation, ion exchange, coagulation, surface precipitation, and electrostatic attraction techniques. ,,, To effectively remove heavy metal–organic complexes, decomplexation is recognized to be a crucial step. , Among all of the decomplexation techniques, advanced oxidation processes (AOPs) have been proposed as effective approaches, but the cost of AOPs is still high and the heavy metal ions released into environments after decomplexation require further treatment . Under this circumstance, developing a green and sustainable technique that is capable of decomplexing heavy metal–organic complexes and simultaneously immobilizing and recovering released heavy metal ions after decomplexation is of great importance for efficiently removing heavy metal–organic complexes.…”

Thermal Decomposition Studies on Iron(III) Complexes of 1,2-Bis(imino-4’-antipyrinyl) ethane with Varying Counter Ions

“…A plethora of references describing metal complexes of Schiff bases have appeared in the literature during the past few decades [1][2][3][4] and some of them are very relevant as models for biological systems [5]. However, only little is known about the thermal behaviour of such complexes [6,7]. In relation to this and as the thermal studies of Schiff base-metal complexes is a part of our continuing interest [8][9][10][11][12], here, the phenomenological and mechanistic characteristics of five iron(III) complexes of an antipyrine Schiff base derivative, namely 1,2-bis(imino-4'-antipyrinyl)ethane (GA), having the empirical formula C 24 H 24 N 6 O 2 with varying counter anions (perchlorate, nitrate, thiocyanate,chloride and bromide), are reported.…”