Kinetics based on Mechanism of COD Reduction for Industrial Effluent in Fenton Process

Combining multivariate curve resolution and lumped kinetic modelling for the analysis of lignin degradation by copper-catalyzed Fenton-like systems

“…From the analysis of these global parameters, the degradation of the effluent to be treated is usually represented through an extremely simplified pseudo first order reaction, which provides little information about the degradation mechanism. 21–23…”

“…From the analysis of these global parameters, the degradation of the effluent to be treated is usually represented through an extremely simplified pseudo first order reaction, which provides little information about the degradation mechanism. [21][22][23] In contrast, quite a few articles 7,24 reported detailed kinetic studies, where water treatment is studied through a large number of reactions and the simulation of the complete reaction manifold. Although this approach has the advantage of describing the system in detail, a direct comparison between the results obtained through kinetic calculations and the frequently limited experimental information may be troublesome.…”

“…[25][26][27] There is an intermediate situation between these two kinetic approaches where a "lumped model" is applied, i.e., a simplified model of kinetic equations is proposed, where each lump represents a set of compounds grouped according to some criteria (for instance, their susceptibility to being oxidized). 22,28,29 The latter approach is usually based on the use of global parameters such as TOC, ORP, BOD, or COD to follow the system evolution. 22,28,29 As previously indicated, other types of global parameters frequently used for the kinetic characterization of a water treatment process are those based on UV-vis absorption measurements.…”

“…22,28,29 The latter approach is usually based on the use of global parameters such as TOC, ORP, BOD, or COD to follow the system evolution. 22,28,29 As previously indicated, other types of global parameters frequently used for the kinetic characterization of a water treatment process are those based on UV-vis absorption measurements. However, since absorbance values usually result from the contributions of several species, kinetic profiles obtained from single wavelengths (i.e., univariate analysis) are rather unspecific and practically do not provide information for the development of lumped models capable of unraveling valuable mechanistic issues.…”