Degradation products formed during removal of an aqueous nonylphenol ethoxylate compound (NP-10) by the H2O2/UV-C, Fenton (Fe/H2O2) and photo-Fenton (Fe/H2O2/UV) advanced oxidation processes and their relationship with the acute toxicity toward Vibrio fischeri photobacteria were investigated. Polyethylene glycols with 3-8 ethoxy units, aldehydes and carboxylic acids were identified as the prima...

introduction             wastewater treatment using activated sludge process (asp) produces huge amounts of sludge that must be treated by efficient methods. wastewater sludge handling is one of the most important economic-technical challenges of wastewater treatment projects. conventional methods for this purpose are very time consuming, expensive and in lots of cases have limited success. in ...

This paper explains the Fenton process – Advanced Oxidation Process for treatment of industrial waste water and effect of various parameters on Fenton process. AOPs are the process that generates the hydroxyl radical that oxidizes the impurity compounds and purifies the waste water. For generation of hydroxyl radical there are many methods are available. Fenton process is an advanced oxidation ...

Este trabalho descreve a utilização do processo Fenton para degradação de diesel em solo e destaca aspectos comuns em situações reais de contaminação que podem afetar a eficiência da remediação. Foi observado que a maior parte dos hidrocarbonetos presentes no diesel com menos de 14 carbonos foi perdida por volatilização antes da remediação. Em solo franco, cerca de 80% do diesel foi degradado e...

The effects of ultrasonic irradiation, the chelating agent modified Fenton reaction, and a combination of ultrasound and the Fenton method in removing petroleum contaminants from a soil were studied. The results showed that the contaminant removal rate of the Fenton treatment combined with an oxalic acid chelating agent was 55.6% higher than that without a chelating agent. The average removal r...

several laundry houses throughout tehran consume a large amount of water each day and discharge the resulting wastewater into septic tanks or municipal sewage system without any suitable pretreatment. this would result in severe contamination and other serious environmental issues. in the present study, performance of electrocoagulation/flotation process with aluminum and iron electrodes is com...

19 In this study, we attempt for the first time to couple sonication and photo-Fenton for bacterial 20 inactivation of secondary treated effluent. Synthetic wastewater was subjected to sequential high21 frequency/low power sonication, followed by mild photo-Fenton treatment, under a solar simulator. It 22 was followed by the assessment of the contribution of each component of the process (Fento...

Presence of antibiotics in the environment may cause potential risk for aquatic environment and organisms. In this research, Fenton oxidation process was offered as an effective method for removal of antibiotic sulfamethoxazole from aqueous solutions. The experiments were performed on laboratory-scale study under complete mixing at 25±2°C. The effects of initial antibiotic concentration, molar ...

The application of the photo-Fenton process for the treatment of wastewaters contaminated with diesel oil was investigated. This particular process has been widely studied for the photochemical degradation of highly toxic organic pollutants. Experiments were performed according to a factorial experimental design at two levels and two variables: H(2)O(2) concentration (5-200 mM) and Fe(2+) conce...

In this study, we attempt for the first time to couple sonication and photo-Fenton for bacterial inactivation of secondary treated effluent. Synthetic wastewater was subjected to sequential high-frequency/low power sonication, followed by mild photo-Fenton treatment, under a solar simulator. It was followed by the assessment of the contribution of each component of the process (Fenton, US, hv) ...