Decolorizing dye wastewater from the agate industry with Fenton oxidation process

Barros, André Luis Corrêa de; Pizzolato, Tânia Mara; Carissimi, Élvis; Schneider, Ivo

doi:10.1016/j.mineng.2005.04.004

Cited by 71 publications

(28 citation statements)

References 7 publications

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“…The potential hazards and damage caused by pesticides have been outlined by Walker et al [6]. In order to minimise the potential health risks, various treatment processes have been investigated to remove pesticides from water, including photo catalysis [7][8][9], electrochemical degradation [10,11], Fenton oxidation [10], hydrogen peroxide oxidation [12], and ultrasound [13]. Physico-chemical techniques which have demonstrated treatment efficacy include adsorption [14], membrane technology [15], ozone, UV photolysis, ozone/ultraviolet (UV) photolysis [16,17], and ultrasonication [18].…”

Section: Introductionmentioning

confidence: 99%

Pesticide degradation in water using atmospheric air cold plasma

Sarangapani¹,

Misra²,

Milosavljević³

et al. 2016

Journal of Water Process Engineering

180

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a b s t r a c tA high voltage dielectric barrier discharge plasma reactor using atmospheric air as the inducer gas was studied for the degradation of pesticides (dichlorvos, malathion, endosulfan) in water. The degradation kinetics of the pesticides were studied using GC-MS as a function of plasma control parameters. Electrical characterisation of the plasma revealed that the plasma discharge consisted of filamentary streamers. Excited nitrogen, reactive oxygen species and OH radicals generated in the dielectric barrier discharge (DBD) plasma reactor were identified using optical emission spectroscopy. Ozone, used as an indicator for metastable oxygen species, was quantified within the reactor at concentrations of 1600, 2200, 2800 ppm after 8 min of plasma treatment for applied voltages of 60, 70, and 80 kV respectively. The degradation efficacy of pesticides after 80 kV and 8 min of plasma treatment were found to be 78.98 ± 0.81% for dichlorvos, 69.62 ± 0.14% for malathion and 57.71 ± 0.58% for endosulfan. Degradation was found to follow first order kinetics. GC-MS analyses showed that the degraded compounds and intermediates formed were less toxic than the parent pesticide. A proposed mechanism of degradation of these pesticides is suggested.

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Section: Introductionmentioning

confidence: 99%

Pesticide degradation in water using atmospheric air cold plasma

Sarangapani¹,

Misra²,

Milosavljević³

et al. 2016

Journal of Water Process Engineering

180

View full text Add to dashboard Cite

show abstract

“…Fenton's reactions have been extensively studied for application to the degradation of a wide range of organic compounds including herbicides [1], pesticides [2], dyes [3], phenol [4] and chlorinated phenols [5]. They have been utilized in combination with UV/TiO 2 photocatalysts [6,7], ultrasounds [8] and also with a pulsed corona discharge [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Influence of iron ions on the phenol oxidation

2006

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An influence of iron ions presence in water contaminated with phenol on phenol degradation induced by the corona discharge in air-like gas mixture was studied. DC positive corona discharge was generated between a hollow needle, through which air with 1.5 % CO 2 flowed, and the water surface. Concentration of phenol and iron sulphate in water was 0.6 mM and 0.08 mM, respectively. It was observed that phenol degradation was not enhanced by the presence of iron ions. There was no Fenton reaction producing OH radicals, in spite of significant production of hydrogen peroxide. Instead of going into Fenton reaction with hydrogen peroxide molecules, iron ions react with ozone which is produced in gas phase and then dissolves in water.PACS : 52.80.Wq

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“…These molecules have bio cumulative properties in living tissues, altering the functioning of the cells [32]. Ozonization [35] [36] and advanced oxidative processes (AOPs) [34] has been a focus of alternative treatment of such wastewaters. In particular, best results were achieved with AOPs, a process based on the generation of the hydroxyl radical (•OH), a species with a high oxidizing potential.…”

Section: Effluentsmentioning

confidence: 99%

Environmental Issues on the Industrial Processing of Raw Agate

Vilasbôas¹,

Santos²,

Schneider³

2017

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Agate geodes are treated and stained for the production of handmade artifacts and jewelry, which greatly increases their aggregate value. Unit operations involve storage, sorting, cutting, crushing, dyeing, polishing, washing, and finishing. Substantial amounts of waste materials are produced, which include agate pieces, powders (with or without oils), and wastewaters from organic and inorganic staining procedures. The aim of this work was to quantify the amounts of these waste materials, their characteristics, and possibilities for reuse or recycling in other productivity sectors in the context of the second decade of the 21st century. A review of the theme was carried out and possibilities were analyzed in the light of classic and new technologies.

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Decolorizing dye wastewater from the agate industry with Fenton oxidation process

Cited by 71 publications

References 7 publications

Pesticide degradation in water using atmospheric air cold plasma

Pesticide degradation in water using atmospheric air cold plasma

Influence of iron ions on the phenol oxidation

Environmental Issues on the Industrial Processing of Raw Agate

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