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Photolysis and photooxidation of typical gaseous VOCs by UV Irradiation: Removal performance and mechanisms

In-Sun Kang, Jinying Xi, Hong-Ying Hu

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 3, doi: 10.1007/s11783-018-1032-0

Abstract: Photodegradation by ultraviolet irradiation (UV) is increasingly applied in volatile organic compoundhydrocarbon derivatives, at 150–200 ppm in air and nitrogen gas were treated by a laboratory-scale UVreactor with 185/254 nm irradiation to systematically investigate their removal and conversion by UVThe respective contributions of photolysis and photooxidation to VOC removal were identified for eachThe carbon balance of each VOC during UV irradiation was analyzed based on the VOC, CO and PM concentrations

Keywords： VOCs     UV photodegradation     Particulate matters     Ozone    

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A photolysis coefficient for characterizing the response of aqueous constituents to photolysis

David R. HOKANSON,Ke LI,R. Rhodes TRUSSELL

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 428-437 doi: 10.1007/s11783-015-0780-3

Abstract: UV photolysis and UV based advanced oxidation processes (AOPs) are gaining more and more attention forIt was shown that this product, named the photolysis coefficient, , can be determined using standardThe development showed the photolysis coefficient to be equally useful for microbiological, inorganicorganic compounds, which varied over a range of approximately 10 to 1000 and are much less sensitive to UVphotolysis than the microorganisms.

Keywords： UV photolysis     disinfection     advanced oxidation     N-nitrosodimethylamine     quantum yield     absorption    

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Benzene degradation in waste gas by photolysis and photolysis-ozonation: experiments and modeling

Fariba Mahmoudkhani, Maryam Rezaei, Vahid Asili, Mahsasadat Atyabi, Elena Vaisman, Cooper H. Langford, Alex De Visscher

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0876-4

Abstract: A feasibility study shows that the photolysis of benzene is a cost-effective process.data and modeling results show that the degradation efficiency will increase when the combination of UV

Keywords： Photolysis     Ozone     Benzene     Waste gas     Simulation     Synergism    

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Ambient photolysis frequency of NO

Qi Zou,Keding Lu,Yusheng Wu,Yudong Yang,Zhuofei Du,Min Hu

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0885-3

Abstract: • Chemical actinometer (CA) was built for NO photolysis frequency, j(NO ), analysis. • CA data (10%The photolysis frequency of NO , j(NO ), is an important analytical parameter in the study of tropospheric

Keywords： Photolysis frequency of nitrogen dioxide     Chemical actinometer     Spectroradiometer     Tropospheric ultraviolet    

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Comparison of sequential with intimate coupling of photolysis and biodegradation for benzotriazole

Shunan Shan, Yuting Zhang, Yining Zhang, Lanjun Hui, Wen Shi, Yongming Zhang, Bruce E. Rittmann

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 6, doi: 10.1007/s11783-017-0953-3

Abstract: Sequential and intimate coupling of UV-photolysis with biodegradation were investigated for their impactswas accelerated by photolytic pretreatment up to 9 min, but BTA biodegradation was slowed with longer photolysisBecause more AP and PHZ accumulated with increasing photolysis time, their inhibitory effects began todominate with longer photolysis time.Intimately coupling photolysis with biodegradation relieved the inhibition effect, because AP and PHZ

Keywords： Benzotriazole     Photolysis     Biodegradation     Inhibition     Electron donor    

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Estimation of photolysis half-lives of dyes in a continuous-flow system with the aid of quantitative

Davoud BEIKNEJAD,Mohammad Javad CHAICHI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 683-692 doi: 10.1007/s11783-014-0680-y

Abstract: In this paper the photolysis half-lives of the model dyes in water solutions and under ultraviolet (UVstepwise multiple linear regression (MLR) and partial least squares (PLS) for the prediction of the photolysisThe QSPR results obtained with these models show that in MLR-derived model, photolysis half-lives of

Keywords： dye     photolysis half-life     quantitative structure-property relationship     continuous-flow     stepwise multiple    

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Removal of virus aerosols by the combination of filtration and UV-C irradiation

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 3, doi: 10.1007/s11783-023-1627-y

Abstract:

● The removal of virus aerosols by filtration and UV-C irradiation

Keywords： Filtration system     UV-C irradiation     Virus aerosol     Public health     COVID-19    

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and bacteriophage MS2 disinfection by UV, ozone and the combined UV and ozone processes

Jingyun FANG,Huiling LIU,Chii SHANG,Minzhen ZENG,Mengling NI,Wei LIU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 547-552 doi: 10.1007/s11783-013-0620-2

Abstract: However, less is known about the disinfection performance of UV and ozone (UV/ozone) coexposure and sequentialUV-followed-by-ozone (UV-ozone) and ozone-followed-by-UV (ozone-UV) exposures.In this study, inactivation of and bacteriophage MS2 by UV, ozone, UV/ozone coexposure, and sequentialUV-ozone and ozone-UV exposures was investigated and compared.Little enhancement on inactivation was found after the sequential UV-ozone or ozone-UV exposures.

Keywords： bacteria inactivation     photoreactivation     water disinfection     UV     ozone    

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Predictive models on photolysis and photoinduced toxicity of persistent organic chemicals

Qing ZHANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 803-814 doi: 10.1007/s11783-013-0547-7

Abstract: Photodegradation is a major abiotic transformation pathway of toxic chemicals in the environment, which in some cases might lead to photoinduced toxicities. The data on photodegradation kinetics and photoinduced toxicities of organic chemicals are essential for their risk assessment. However, the relevant data are only available for a limited number of chemicals, due to the difficulty and high cost of experimental determination. Quantitative structure-activity relationship (QSAR) models that relate photodegradation kinetics or photoinduced toxicity of organic chemicals with their physicochemical properties or molecular structural descriptors may enable simple and fast estimation of their photochemical behaviors. This paper reviews the QSAR models on photodegradation quantum yields and rate constants for toxic organic chemicals in different media including liquid phase, gaseous phase, surfaces of plant leaves, and QSAR models on photoinduced toxicity of organic chemicals to plants, bacteria, and aquatic invertebrates. Further prospects for QSAR model development on photodegradation kinetics and photoinduced toxicity of refractory organic chemicals are proposed.

Keywords： quantitative structure-activity relationship (QSAR) models     photodegradation     persistent organic pollutants     environmental media     mechanisms    

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Enhanced formation of trihalomethane disinfection byproducts from halobenzoquinones under combined UV

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1510-7

Abstract:

• 2,6-DCBQ and TCBQ generated THMs differently in chlorine and UV/chlorine

Keywords： Halobenzoquinone     Trihalomethane     Chlorine disinfection     UV irradiation     Disinfection byproducts     CombinedUV/chlorine    

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Decomposition of aqueous chlorinated contaminants by UV irradiation with H

Eunsung KAN,Chang-Il KOH,Kyunghyuk LEE,Joonwun KANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 429-435 doi: 10.1007/s11783-014-0677-6

Abstract: rates of carbon tetrachloride (CCl ) and 2,4-dichlorophenol (2,4-DCP) in water by the ultraviolet (UV) light irradiation alone and H O /UV were experimentally investigated.capacities of the two different ultraviolet light sources (low and medium pressure Hg arc) in H O /UVthan the low pressure UV lamp alone.In the direct photolysis of aqueous CCl , the medium pressure UV lamp had advantage over the low pressure

Keywords： H2O2/ultraviolet (UV) light     advanced oxidation     UV light irradiation     chlorinated    

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chemical descriptors into quantitative structure-property relationship models for prediction of the photolysis

Yueping BAO, Qiuying HUANG, Wenlong WANG, Jiangjie XU, Fan JIANG, Chenghong FENG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 505-511 doi: 10.1007/s11783-011-0318-2

Abstract: Quantitative structure-property relationship (QSPR) models were developed for prediction of photolysishalf-life ( ) of polychlorinated biphenyls (PCBs) in water under ultraviolet (UV) radiation.

Keywords： photolysis     polychlorinated biphenyls (PCBs)     quantitative structure-property relationships (QSPRs)     quantum    

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Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1430-6

Abstract:

• UV-vis absorption analyzer was applied in drainage type online recognition

Keywords： Drainage online recognition     UV-vis spectra     Derivative spectrum     Convolutional neural network    

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Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-021-1489-0

Abstract:

• UV/VUV/I– induces substantial H2O2 and IO3– formation, but UV/I– does not.

Keywords： Vacuum ultraviolet     Hydrogen peroxide     Iodate     Hydroxyl radical     Redox transition    

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Effects of water quality on the coagulation performances of humic acids irradiated with UV light

Wendong WANG,Qinghai FAN,Zixia QIAO,Qin YANG,Yabo WANG,Xiaochang WANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1,   Pages 147-154 doi: 10.1007/s11783-014-0749-7

Abstract: including pH, turbidity, alkalinity, and hardness on the removal of humic acid were investigated in a UVOur results suggested that UV light radiation could effectively improve the removal rate of humic acidthe variations of the selected water quality parameters had little adverse effect on the function of UVAfter UV light radiation, the removal rate of the nitro-humic acid (NHA) increased from 20% to 60% inThe formation of positive charged sites after UV light radiation was considered to be the primary factor

Keywords： coagulation     drinking water     humic acid     UV light radiation     water quality    

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Title Author Date Type Operation

Photolysis and photooxidation of typical gaseous VOCs by UV Irradiation: Removal performance and mechanisms

In-Sun Kang, Jinying Xi, Hong-Ying Hu

Journal Article

A photolysis coefficient for characterizing the response of aqueous constituents to photolysis

David R. HOKANSON,Ke LI,R. Rhodes TRUSSELL

Journal Article

Benzene degradation in waste gas by photolysis and photolysis-ozonation: experiments and modeling

Fariba Mahmoudkhani, Maryam Rezaei, Vahid Asili, Mahsasadat Atyabi, Elena Vaisman, Cooper H. Langford, Alex De Visscher

Journal Article

Ambient photolysis frequency of NO

Qi Zou,Keding Lu,Yusheng Wu,Yudong Yang,Zhuofei Du,Min Hu

Journal Article

Comparison of sequential with intimate coupling of photolysis and biodegradation for benzotriazole

Shunan Shan, Yuting Zhang, Yining Zhang, Lanjun Hui, Wen Shi, Yongming Zhang, Bruce E. Rittmann

Journal Article

Estimation of photolysis half-lives of dyes in a continuous-flow system with the aid of quantitative

Davoud BEIKNEJAD,Mohammad Javad CHAICHI

Journal Article

Removal of virus aerosols by the combination of filtration and UV-C irradiation

Journal Article

and bacteriophage MS2 disinfection by UV, ozone and the combined UV and ozone processes

Jingyun FANG,Huiling LIU,Chii SHANG,Minzhen ZENG,Mengling NI,Wei LIU

Journal Article

Predictive models on photolysis and photoinduced toxicity of persistent organic chemicals

Qing ZHANG

Journal Article

Enhanced formation of trihalomethane disinfection byproducts from halobenzoquinones under combined UV

Journal Article

Decomposition of aqueous chlorinated contaminants by UV irradiation with H

Eunsung KAN,Chang-Il KOH,Kyunghyuk LEE,Joonwun KANG

Journal Article

chemical descriptors into quantitative structure-property relationship models for prediction of the photolysis

Yueping BAO, Qiuying HUANG, Wenlong WANG, Jiangjie XU, Fan JIANG, Chenghong FENG

Journal Article

Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm

Journal Article

Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Journal Article

Effects of water quality on the coagulation performances of humic acids irradiated with UV light

Wendong WANG,Qinghai FAN,Zixia QIAO,Qin YANG,Yabo WANG,Xiaochang WANG

Journal Article