Efficient Cu removal from CuEDTA complex-containing wastewater using electrochemically controlled sacrificial iron anode

Recent progress in electrocatalytic selectivity in heterogeneous electro-Fenton processes

“…The Cu( ii ) in Cu–EDTA was first reduced to Cu( i ) and then to Cu(0) by an electron transfer process, and the EDTA was gradually oxidized to small organic matter and NO 3 − . 159 Cu–EDTA could be treated in an electrochemical reactor using a stainless steel electrode as a cathode and an iron electrode as the anode (Fig. 6d).…”

Removal of copper ions by functionalized biochar based on a multicomponent Ugi reaction

“…where T (K) is the absolute temperature; R (8.314 J mol À1 K À1 ) is the gas constant; the values of DG 0 (kJ mol À1 ) were calculated from the eqn (12), and the values of DH 0 (kJ mol À1 ) and DS 0 (J mol À1 ) were calculated from the slope and intercept of the plot between ln K versus 1/T. The adsorption equilibrium constant K 0 was calculated by plotting ln K d against C e and extrapolating C e to zero.…”

“…A large number of technologies have been adapted and practiced to ensure environmental safety in the removal of heavy metals; these include chemical precipitation, 8 ion exchange, 9 membrane separation, 10 flocculation, 11 electrolysis, 12 reverse osmosis 13 and adsorption. 14 The large-scale application of these technologies has been hindered due to constraints such as high operating costs, large amounts of waste generation, limitations on the operating conditions (such as pH, temperature, and pressure), and the use of toxic chemicals.…”