Optimization of phenol degradation and its derivatives using photo-Fenton and application industrial

Abstract

In industrial effluent are common persistent organic pollutants found that even low concentrations have a high potential carcinogenic and/or mutagenic, such as phenol and derivatives thereof, which poses risks to the environment. This work has identified and measured through high-performance liquid chromatography (HPLC) and its phenol formed as intermediate and also the amount of total organic carbon (TOC). Degradation was evaluated using the same process of photo-Fenton treatment (Fe²⁺/H₂O₂/UV) applying annular reactor and a kinetic study was carried out in terms of TOC. The experimental design was the type central composite. In the process used a photochemical reactor annular counter optimized in the following conditions: [Fe²⁺]=14.15 mg L^-1, [H₂O₂]=1663.40 mgL^-1 at pH 3 for 126.18 minutes, obtaining a mineralization 99.89% TOC and [Fe²⁺]=15 mgL^-1 [H₂O₂]=1800 mgL^-1 in 120 minutes a percentage of 100% phenol degradation, respectively. The kinetic model adopted (Lumped Kinetic Model) allowed satisfactory way of representing (R²=0.9892). The photo-Fenton process proved to be efficient for degradation of phenol and intermediates can be incorporated as part of the effluent treatment systems, making it an effective alternative to the complete degradation of the pollutants thereby relieving the impact on water resources and reducing contamination by-products end of the process.

Keywords: Advanced oxidation processes;  Phenol, Homogeneous processes; Photo-Fenton.