A5014266686- Pharmaceutical and Antibiotic Environmental Impacts
- Advanced oxidation water treatment
- Marine and coastal ecosystems
- Atmospheric chemistry and aerosols
- Water Quality Monitoring and Analysis
- Microplastics and Plastic Pollution
- Toxic Organic Pollutants Impact
- Analytical chemistry methods development
- Atmospheric Ozone and Climate
- Isotope Analysis in Ecology
- Water Treatment and Disinfection
- Air Quality and Health Impacts
- Environmental remediation with nanomaterials
- Atmospheric and Environmental Gas Dynamics
- Advanced Photocatalysis Techniques
- Pesticide and Herbicide Environmental Studies
- Electrochemical Analysis and Applications
- Air Quality Monitoring and Forecasting
- Analytical Chemistry and Sensors
- Biosensors and Analytical Detection
- Electrochemical sensors and biosensors
- Marine Biology and Ecology Research
- Photochemistry and Electron Transfer Studies
- Arsenic contamination and mitigation
- Plant Disease Management Techniques
University of Turin
2016-2025
Hunan Research Academy of Environmental Sciences
2022
Guangzhou Institute of Geochemistry
2022
Sun Yat-sen University
2022
Torino e-district
2018
Abstract Microplastics are of rising health concerns because they have been detected even in remote and pristine environments, from the Artic snow to Marianne Trench. The occurrence impact nanoplastics ecosystems is almost unknown, particular due analytical limitations such as very small sizes that fall below detection limits current techniques. Here we take advantage a common interference flow cytometry develop method for quantification number plastic particles 0.6–15 µm size range. Plastic...
Abstract. The presence of organic sulfur compounds (OS) at the water surface acting as surfactants, may influence air-water interaction and contribute to new particle formation in atmosphere. However, impact ubiquitous anthropogenic pollutant emissions, such SO2 polycyclic aromatic hydrocarbons (PAHs) on OS interface still remains unknown. Here, we observe large amounts SO2, upon irradiation aqueous solutions containing typical PAHs, pyrene (PYR), fluoranthene (FLA), phenanthrene (PHE) well...
The photodegradation of vanillin, as a proxy methoxyphenols emitted by biomass burning, was investigated in artificial snow at 243 K and liquid water room temperature. Nitrite (NO2–) used photosensitizer reactive oxygen nitrogen species under UVA light, because its key photochemical role snowpacks atmospheric ice/waters. In the absence NO2–, slow direct photolysis vanillin observed due to back-reactions taking place quasi-liquid layer ice-grain surface. addition NO2– made faster, important...
When irradiated in paddy-field water, propanil (PRP) undergoes photodegradation by direct photolysis, reactions with •OH and CO3•-, possibly also the triplet states of chromophoric dissolved organic matter. Irradiation inhibits nonphotochemical (probably biological) degradation PRP. The dark- light-induced pathways can be easily distinguished because 3,4-dichloroaniline (34DCA, a transformation intermediate considerable environmental concern) is produced almost 100% yield dark but not at all...
The carbonate radical CO3•- and the excited triplet states of chromophoric dissolved organic matter play an important role in photodegradation some easily oxidized pollutants surface waters, such as aromatic amines. Anilines sulfadiazine are known to undergo back-reduction processes when their degradation is mediated by photosensitizers (triplet sensitization). Back-reduction, which inhibits photodegradation, means that phenols or antioxidant (mostly phenolic) moieties occurring natural...
Benzoate (Bz-) and acetophenone (AcPh) are aromatic compounds known to be produced by sunlight irradiation of polystyrene aqueous suspensions. Here we show that these molecules could react with •OH + CO3•- in sunlit natural waters, while other photochemical processes (direct photolysis reaction singlet oxygen, or the excited triplet states chromophoric dissolved organic matter) unlikely important. Steady-state experiments were carried out using lamps, time evolution two substrates was...
Abstract Carcinogenic benzene is the most concerning product of irradiation polystyrene nanoplastics in aqueous suspension. Interestingly, formed water from can volatilise to gas phase or react with aqueous-phase hydroxyl radicals ( • OH (w) ) produce toxic phenol. The persistence would range some weeks months, and branching ratio between reaction volatilisation mainly depends on depth DOC (dissolved organic carbon) concentration. Actually, particularly important shallow waters (1–2 m...
By a combination of transient absorption spectroscopy and steady-state irradiation experiments, we investigated the transformation phenol furfuryl alcohol (FFA) sensitised by irradiated 4-carboxybenzophenone (CBBP). The latter is reasonable proxy molecule to assess reactivity excited triplet states chromophoric dissolved organic matter that occurs in natural waters. main reactive species for both FFA was CBBP state, despite fact commonly used probe 1O2. In case it possible develop simple...
Abstract The photochemical reactions of organic compounds at the water surface lead to formation gas‐phase molecules that may contribute new particle in atmosphere. Here, we observe sulfur (OS) are known secondary aerosol (SOA) precursors, upon irradiation aqueous solutions containing typical polycyclic aromatic hydrocarbons (PAHs) such as pyrene, fluoranthene, and phenanthrene well dimethylsulfoxide (DMSO). reactivity between excited triplet states PAHs ( 3 PAHs*) DMSO was determined by...
The secondary pollutant 3,4-dichloroaniline (DCA) is produced by the biological degradation of several herbicides, including propanil in paddy fields. enzymatic hydrolysis yields DCA with almost quantitative yield. undergoes rather fast photodegradation water, mostly direct photolysis. An exception might be represented cases (rather rare paddies) quite high nitrate concentration (around 50 mg NO3– L–1), when CO3•– would play a comparable role to that experimentally measured photoreactivity...
ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTThe Possible Production of Harmful Intermediates Is the "Dark Side" Of Environmental Photochemistry Contaminants (Potentially Adverse Effects, And Many Knowledge Gaps)Davide Vione*Davide VioneDipartimento di Chimica, Università Torino, Via Pietro Giuria 5, 10125 Italy*Email: [email protected]More by Davide Vionehttp://orcid.org/0000-0002-2841-5721 and Luca CarenaLuca CarenaDipartimento ItalyMore CarenaCite this: Environ. Sci. Technol. 2020, 54,...
Evidence is here provided that irradiation of some lake water samples can trigger the formation fluorophores with humic-like properties, at same time increasing absorbance. This phenomenon opposite photobleaching, which often observed when natural waters are irradiated. The photoproduced would be autochthonous rather than allochthonous origin, marks a difference fraction humic substances derives from terrestrial sources. Photogeneration compounds highlighted in where fluorescence signal...
Chromophoric dissolved organic matter (CDOM) plays key role as photosensitizer in sunlit surface-water environments, and it is deeply involved the photodegradation of contaminants. It has recently been shown that sunlight absorption by CDOM can be conveniently approximated based on its monochromatic at 560 nm. Here we show such an approximation allows for assessment photoreactions a wide global scale and, particularly, latitude belt between 60°S 60°N. Global lake databases are currently...