Heterogeneous and homogeneous wastewater treatment — Comparison between photodegradation with TiO2 and the photo-fenton reaction

Spacek, W.; Bauer, R.; Heisler, G.

doi:10.1016/0045-6535(94)00426-u

Cited by 74 publications

(25 citation statements)

References 15 publications

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“…However, it is interesting that the input of ferrous ion is much smaller for the treatment of phenolic compounds by Fenton system. The typical ratio of ferrous ion to hydrogen peroxide was 0.04-0.2 for chlorophenols [13,14], 0.01-0.1 for phenol [3,15] and 0.04-0.1 for nitrophenols [4]. Although the initial concentration of ferrous ion was low, the degradation of phenolic compounds was quick.…”

Section: Introductionmentioning

confidence: 98%

Role of the intermediates in the degradation of phenolic compounds by Fenton-like process

Zhou

Lei

2006

Journal of Hazardous Materials

119

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Section: Introductionmentioning

confidence: 98%

Role of the intermediates in the degradation of phenolic compounds by Fenton-like process

Zhou

Lei

2006

Journal of Hazardous Materials

119

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“…[1][2][3][4] Simple Fenton reaction involves the formation of hydroxyl and perhydroxy radicals. [5][6][7] Degradation of various organic compounds e.g.…”

Section: Introductionmentioning

confidence: 99%

A study of catalytic behaviour of aromatic additives on the photo-Fenton degradation of phenol red

et al. 2009

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The present study describes the photochemical degradation of phenol-red using photoFenton reaction. The progress of the reaction has been monitored spectrophotometrically. The effect of various organic additives e.g. hydroquinone, resorcinol and catechol on the rate of photodegradation has been observed. The effect of variation of various parameters such as pH, concentration of dye, Fe 3+ ion and additives, amount of H 2 O 2 , and light intensity on the rate of photodegradation was also observed. A tentative mechanism of the reaction has been proposed.

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“…UV is involved in the formation of H 2 O 2 , but also acts to destroy H 2 O 2 under the UV photon flux throughout the day (Zent & McKay 1994). Mo¨hlmann (2004) showed experimentally that radiation-induced hydroxyl formation in the presence of dissolved iron might take place in the presence of adsorbed water at the Martian surface (' Photo-Fenton reaction '; Spacek et al 1995). The importance of UV radiation in Martian photochemical processes was not only shown by the experiments of Yen et al (2000), but is also implied from the investigations of Martian surface samples by the Viking Landers.…”

Section: Uv Radiation and The Formation Of Oxidants At The Martian Sumentioning

confidence: 99%

“…Since UV radiation represents an important prerequisite in photochemical reactions at the Martian surface, care has to be taken on the choice of UV sources for rigorous simulations of the Martian environment. Several photochemical reactions and specific interactions may be induced by a broad range of irradiation energies in the UV-VIS region (Spacek et al 1995;Yen et al 2000;Mo¨hlmann 2004). This is why UV simulators, dedicated for photo catalytic Mars research, should be capable of emitting light in the full range of anticipated Martian surface fluxes.…”

Section: Uv Simulation For Catalytic Experimentsmentioning

confidence: 99%

An ultraviolet simulator for the incident Martian surface radiation and its applications

Kolb

Abart

Bérces

et al. 2005

International Journal of Astrobiology

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: Ultraviolet (UV) radiation can act on putative organic/biological matter at the Martian surface in several ways. Only absorbed, but not transmitted or reflected, radiation energy can be photo-chemically effective. The most important biological UV effects are due to photochemical reactions in nucleic acids, DNA or RNA, which constitute the genetic material of all cellular organisms and viruses. Protein or lipid effects generally play a minor role, but they are also relevant in some cases. UV radiation can induce wavelengths-specific types of DNA damage. At the same time it can also induce the photo-reversion reaction of a UV induced DNA photoproduct of nucleic acid bases, the pyrimidine dimers. Intense UVB and UVC radiation, experienced on early Earth and present-day Mars, has been revealed to be harmful to all organisms, including extremophile bacteria and spores. Moreover, the formation of oxidants, catalytically produced in the Martian environment through UV irradiation, may be responsible for the destruction of organic matter on Mars. Following this, more laboratory simulations are vital in order to investigate and understand UV effects on organic matter in the case of Mars. We have designed a radiation apparatus that simulates the anticipated Martian UV surface spectrum between 200 and 400 nm (UVC-UVA). The system comprises a UV enhanced xenon arc lamp, special filter-sets and mirrors to simulate the effects of the Martian atmospheric column and dust loading. We describe the technical setup and performance of the system and discuss its uses for different applications. The design is focused on portability, therefore, the Mars-UV simulator represents a device for several different Mars simulation facilities with specific emphasis on Mars research topics.

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Heterogeneous and homogeneous wastewater treatment — Comparison between photodegradation with TiO2 and the photo-fenton reaction

Cited by 74 publications

References 15 publications

Role of the intermediates in the degradation of phenolic compounds by Fenton-like process

Role of the intermediates in the degradation of phenolic compounds by Fenton-like process

A study of catalytic behaviour of aromatic additives on the photo-Fenton degradation of phenol red

An ultraviolet simulator for the incident Martian surface radiation and its applications

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