Mechanistic modeling of vacuum UV advanced oxidation process in an annular photoreactor

Crapulli, Ferdinando; Santoro, Domenico; Sasges, M.; Ray, Ajay K.

doi:10.1016/j.watres.2014.06.048

Cited by 62 publications

(20 citation statements)

References 31 publications

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“…Since the absorption cross section of VUV photons by water molecules is large [258][259][260], the effect of VUV photolysis in practice occurs within a thin layer near the gas-liquid interface. The absorption coefficient of liquid water at λ < 170 nm is 10 3 -10 5 cm −1 [259], which means that 90% of the radiation is absorbed by a water layer with a thickness of 10 −3 -10 −5 cm. At a wavelength of 185 nm the penetration depth is about 0.1 cm [261].…”

Section: Vuv Radiationmentioning

confidence: 99%

Plasma–liquid interactions: a review and roadmap

Bruggeman

Kushner

Locke

et al. 2016

Plasma Sources Sci. Technol.

1,294

885

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Plasma-liquid interactions represent a growing interdisciplinary area of research involving plasma science, fluid dynamics, heat and mass transfer, photolysis, multiphase chemistry and aerosol science. This review provides an assessment of the state-of-the-art of this multidisciplinary area and identifies the key research challenges. The developments in diagnostics, modeling and further extensions of cross section and reaction rate databases that are necessary to address these challenges are discussed. The review focusses on nonequilibrium plasmas.

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Section: Vuv Radiationmentioning

confidence: 99%

Plasma–liquid interactions: a review and roadmap

Bruggeman

Kushner

Locke

et al. 2016

Plasma Sources Sci. Technol.

1,294

885

View full text Add to dashboard Cite

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“…In the past, CFD simulation has been extensively applied for design exploration studies in UV disinfection and UV AOPs [13][14][15][16][17][18][19]. For example, Wols [15] employed CFD simulation for the design exploration study of multi-lamp UV photoreactors for the removal of a model herbicide (atrazine).…”

Section: Introductionmentioning

confidence: 99%

A study of enhanced performance of VUV/UV process for the degradation of micropollutants from contaminated water

Bagheri

Mohseni

2015

Journal of Hazardous Materials

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“…It has been reported that reactive species such as HO• can be generated during the photolysis of water molecule, which absorbs VUV light photon, following the reaction Eq 1 [19,20,27]. Then many other oxidizing and reducing reactive species, e.g., H 2 O 2 and O 2…”

Section: Mechanismmentioning

confidence: 99%

Efficient Removal of Micropollutants in Rainwater by New Vacuum Ultraviolet

Li¹,

Chen²,

Yue³

2015

Proceedings of the 2015 International Conference on Advanced Engineering Materials and Technology

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Abstract. Toxic micropollutants in rainwater challenge the effective reuse of rainwater. This study proposed the application of newly developed vacuum-ultraviolet (VUV) in the advanced treatment of rainwater, and assessed the efficiency and feasibility in application. The VUV was generated from the UV lamp made of the new special silica. Benzoic acid, p-hydroxyl benzoic acid, bisphenol A, p-chlorobenzoic acid, nitrobenzene, and p-chloronitrobenzene were selected as target compounds. Their degradation efficiency was evaluated, and the degradation kinetics were also analyzed. Influence of pH was investigated, and the degradation mechanisms were explored by distinguishing the individual contributions of different radicals involved. The efficiency of VUV was further compared with that of H 2 O 2 /UV process, and its advantages were consequently discussed when applied in the practical rainwater treatment. The results obtained here will support the VUV irradiation as an promising treatment process for the purification of rainwater for the centralized and decentralized systems to guarantee the safety of the rainwater reuse. IntroductionOur world suffers from an increasing water crisis because of the climate change, anthropogenic water pollution [1][2][3][4]. Besides stringent wastewater treatment prior to drainage to environment and development of new and effective water treatment methods to guarantee the safety of water use, exploration and full utilization of new water resources are promising [1,5]. From the point of view of water circulation globally, in essence, rainwater or storm water is the origin of fresh water. So rainwater harvesting and utilization is a promising approach to alleviate the water crisis [6][7][8][9][10].Rainwater can be used for many purposes, such as irrigation in agriculture, landscape, toilet flushing, firefighting, and even drinking water. Because the pollutants released from industrial factories, traffic, etc. in various areas to atmosphere, inorganic ions and especially the toxic organics (e.g., nitrobenzene and phenols) exist in the rainwater all over the world, in addition to the micro and macro particles and microbes [11][12][13][14]. Most of those toxic organic pollutants are volatile and even recalcitrant, and thus they indeed challenge rainwater utilization. Hence, advanced purification of rainwater is central to guarantee the safety of its wide utilization.Most of the current strategies including coagulation, membrane filtration, adsorption, biodegradation, oxidation, and chlorine and UV disinfection are limited to some extent in practical application and should be selected and applied case on case [15]. The rainwater is usually unevenly distributed globally and annually. Furthermore, the rainwater compositions are also dependent upon the location-specific chemicals released there. Different purpose of rainwater utilization also needs special treatment highly depending on the costs. Advanced oxidation processes (AOPs) are attractive for the generation of very powerfully oxidizing ...

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Mechanistic modeling of vacuum UV advanced oxidation process in an annular photoreactor

Cited by 62 publications

References 31 publications

Plasma–liquid interactions: a review and roadmap

Plasma–liquid interactions: a review and roadmap

A study of enhanced performance of VUV/UV process for the degradation of micropollutants from contaminated water

Efficient Removal of Micropollutants in Rainwater by New Vacuum Ultraviolet

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