نتایج جستجو برای: fenton reaction

تعداد نتایج: 414721  

Journal: :Journal of water process engineering 2022

We investigated the performance of a heterogeneous Fenton-like reaction (ZVI-Fenton, i.e. , ZVI + H 2 O where = zero-valent iron) towards removal potentially pathogenic bacteria in wastewater (WW). The effectiveness process was live (measured by flow cytometry) as well (identified 16S rRNA amplicon sequencing), antibiotic resistance genes and class 1 integrons (assessed qPCR). ZVI-Fenton result...

Journal: :Chemosphere 2014
Berta Riaño Mónica Coca Mari Cruz García-González

This work evaluates the efficiency of different advanced oxidation processes (Fenton method, O3, H2O2 and O3/H2O2) for removing total COD (TCOD) and colour from biologically pre-treated swine manure. The Fenton process with a dosage of 100 mg L(-1) of Fe(2+) and 800 mg L(-1) of H2O2 resulted in about 78% TCOD and 96% colour reductions at an initial pH=3 after a reaction time of 30 min. Coagulat...

Journal: :Chemosphere 2012
Hiroyuki Nakagawa Emi Yamaguchi

The objective of this work is to examine the influence of oxalic acid formed on the degradation of phenol by Fenton reagent. Oxalic acid formed at initial stage within 30 min significantly suppresses the reduction of ferric ion, thus terminating degradation reaction. The yield of oxalic acid is dependent on the amount of ferrous ion dosed since the minimal amount of oxalic acid is formed after ...

2013
Sahand Jorfi Abbas Rezaee Ghasem-ali Moheb-ali Nemat alah Jaafarzadeh

BACKGROUND The problems related to conventional Fenton oxidation, including low pH required and production of considerable amounts of sludge have led researchers to investigate chelating agents which might improve the operating range of pH and the use of nano iron particle to reduce the excess sludge. The pyrene removal from contaminated soils by modified Fenton oxidation at neutral pH was defi...

Journal: :The journal of contemporary dental practice 2015
Zackary Yale Bennett Laurence James Walsh

AIM Tetracycline-stained tooth structure is difficult to bleach using nightguard tray methods. The possible benefits of in-office light-accelerated bleaching systems based on the photo-Fenton reaction are of interest as possible adjunctive treatments. This study was a proof of concept for possible benefits of this approach, using dentine slabs from human tooth roots stained in a reproducible ma...

Journal: :Journal of hazardous materials 2006
Daniel Trujillo Xavier Font Antoni Sánchez

The oxidation of leachate coming from the composting of two organic wastes (wastewater sludge and organic fraction of municipal solid wastes) using the Fenton's reagent was studied using different ratios [Fe(2+)]/[COD](0) and maintaining a ratio [H(2)O(2)]/[COD](0) equal to 1. The optimal conditions for Fenton reaction were found at a ratio [Fe(2+)]/[COD](0) equal to 0.1. Both leachates were si...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 1997
S Hippeli U Rohnert D Koske E F Elstner

Reactive oxygen species are involved in many diseases where the radical species OH, peroxynitrite and the non-radical, hypochlorous acid, play an outstanding role. The formation of OH-type oxidants is essentially confined to a few types of reactions. The most prominent ones are the one-electron reduction of hydrogen peroxide by F2+ or Cu+ -ions (Fenton-type reactions), reaction of hypochlorite ...

ژورنال: یافته 2018

Background : The indiscriminate consumption of antibiotics and their discharge into the environment have created serious complications. Therefore, it is necessary to remove these contaminants from the aquatic environment.  The antibiotic Metronidazole is a contaminant that should be eliminated from the environment. The aim of this study was to evaluate the use of the Electro-Fenton advance...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2005
Jigang Gao Jie Zhou Xiangjin Qu

By coupling the Fenton reaction with the glucose oxidase (GOD)-catalyzed reaction, we have developed a fluorometric method for the determination of glucose; the linear response range and the detection limit are 0.108-2.59 microg/ml and 0.0432 microg/ml, respectively. This approach is selective and has the advantages of using inexpensive reagents and avoiding interferences. Satisfactory results ...

2016

Currently, the textile industry is one of the most important economic sectors in many countries. Besides, it is known as a major consumer of water and consequently one of the largest groups of industries causing intense water pollution. Chemicals, including surfactants, dyes, resins, dispersants agents, inorganic salts, etc., play a variety of functions during the textile processing and are pre...

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