نتایج جستجو برای: fenton reaction

تعداد نتایج: 414721  

2015
Sihai Hu Yaoguo Wu Hairui Yao Jianguo Wei Shuai Zhang

A composite of nano-zerovalent iron (nZVI) supported on granular activated carbon (GAC) was synthesizedthrough adsorption-reduction method, and its performances used as catalyst of Fenton-like were investigated to degrade methylene blue (MB) in model wastewater.Theresults show thathomogeneous dispersion of nZVI was greatly improved after supported on GAC. In comparison, the composite (nZVI/GAC)...

Journal: :international journal of environmental research 2015
m. kaur a. verma h. rajput

this study deals with employing foundry sand (fs) as new low cost iron source in heterogeneousphoto-fenton process for the degradation of herbicide isoproturon (ipu) in aqueous solution. thecharacterization of the fs by eds confirmed presence of iron (23%) required for photo-fenton andsimultaneously confirmed absence of any heavy metals which may be susceptible to leaching. the photo-fenton eff...

Journal: :jundishapur journal of health sciences 0
mansooreh dehghani research center for health sciences, department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, ir iran maryam mosleheyan department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran samaneh karimiyan department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran zahra faramarzi department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran marziye ansari department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran narges shamsedini department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran; department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran. tel: +71-37251003, fax: +71-37250226

background textile dyes are the largest organic compounds associated with some problems for the environment. advanced oxidation process is the most effective method for dye removal from wastewater. objectives the aim of this study was to investigate the efficiency of the photo fenton process for decolorization of direct red 81 (dr 81) dye, and to determine the optimal process conditions. method...

2011
F. V. F. Araujo L. Yokoyama L. A. C. Teixeira J. C. Campos

This work reports a study on the heterogeneous Fenton reaction using hematite powder (Fe2O3) in suspension for the discolouration of the reactive dye Drimarene Red X-6BN in aqueous solutions. The efficiency of the process was studied as a function of the experimental conditions: initial pH; H2O2 dose; and hematite powder concentration; all of which showed a strong effect on the reaction kinetic...

2013
Somayyeh Dehghani Ahmad Jonidi Jafari Mahdi Farzadkia Mitra Gholami

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 ...

Journal: :Environmental Health Perspectives 1994
D A Wink C B Wink R W Nims P C Ford

It has long been recognized that the aqueous mixture of hydrogen peroxide and ferrous ion, known as the Fenton reagent, generates powerful oxidants. Furthermore, the chemical intermediates and reaction pathways of the type generated by this reagent have been implicated in oxidative damage in biological systems. Although the subject continues to be debated, the hydroxyl radical (.OH) is generall...

Journal: :Processes 2023

This study is devoted to the Fenton reaction, which, despite hundreds of reports in a number scientific journals, provides opportunities for further investigation its use as method advanced oxidation organic macro- and micropollutants diverse variations hybrid systems. It transpires that, example, choice concentrations ratios basic chemical substances, i.e., hydrogen peroxide catalysts based on...

2017
Maria Cristina Collivignarelli Roberta Pedrazzani Sabrina Sorlini Alessandro Abbà Giorgio Bertanza

This work was aimed at studying the applicability of H2O2-based oxidation processes (namely H2O2/UV, photo-Fenton, and Fenton) for the treatment of six real aqueous wastes. These wastes derived from chemical, pharmaceutical, and detergent production, and were characterised by high COD (chemical oxygen demand) and, in four cases, surfactant concentrations: overall, about 100 tests were conducted...

Journal: :Biosensors & bioelectronics 2011
Na Qu Liang-Hong Guo Ben-Zhan Zhu

A simple and sensitive electrochemical biosensor was used to detect tyrosine oxidation induced by hydroxyl radicals generated by Fenton reaction (Fe(2+)/H(2)O(2)). Poly(glu, tyr) (4:1) peptides were immobilized on indium tin oxide (ITO) electrode surface via layer-by-layer assembly technique, and Os(bpy)(3)(2+)-mediated tyrosine oxidation current was employed as the signal reporter of the biose...

2013
Akbar Eslami Mahsa Moradi Farshid Ghanbari Fayyaz Mehdipour

BACKGROUND Due to the presence of non-biodegradable and toxic compounds, textile wastewater is difficult to treat by conventional methods. In the present study, Electrochemical Fenton (EF) and Chemical Fenton (CF) processes were studied and compared for the treatment of real textile wastewater. The effects of electrical current, ferrous ion, hydrogen peroxide concentration and reaction time on ...

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