Patrice Coddeville

• PhD HDR
• Managing Director at Institut Mines Telecom Lille Douai

Air quality in rural areas results from the crossing of aged air masses transported from urban areas with local emissions dominated by agriculture and vegetation. The result is a complex mixture of primary and secondary atmospheric species, coming from varied sources and geographical areas. We implemented a methodology for deconvoluting and determi...

Inhalation of welding fumes (WF) containing high levels of transition metals (Cr, Cu, Fe, Mn, Ni…) is associated with numerous health effects including oxidative stress. However, the measurements of the...

Welding fumes (WF) are a complex mixture of ultrafine polymetallic particles, which can deposit in all regions of the respiratory tract. They contain high levels of transition metals (Cr, Cu, Mn …) known to catalyze the production of reactive oxygen species which are related to numerous adverse health effects. In industrial hygiene, collected WF ar...

Indoor environmental exposure to pesticides has become one of the major concerns that might adversely affect human health and development. People spend most of their lifetime in enclosed indoor environments where they might inhale harmful toxic chemicals, such as pesticides, dispersed either in particulate or in a gas phase. In this study, an asses...

This work explores the seasonal variations of the factor of conversion of organic carbon to organic matter (Foc-om) in a rural site in Northern France. This was estimated using a published method linking the remaining mass (RM) fraction of the PM2.5 to the organic carbon (OC). Linear correlations with R2 >0.6 were found, with seasonal Foc-om increa...

The Monitor for Aerosols and Gases in Ambient air (MARGA) is an on-line gas and aerosol sampling and analysis system based on ion chromatography (IC) that allows the monitoring at 1-hour time resolution of major water-soluble atmospheric species in the gas phase (NH3, HCl, HONO, HNO3, SO2) and the particle phase (NH4⁺, Na⁺, K⁺, Ca²⁺, Mg²⁺, Cl⁻, NO3...

We investigated the kinetics, mechanism and secondary organic aerosols formation of the ozonolysis of trans-2-pentenal (T2P) using four different reactors with Fourier Transform InfraRed (FTIR) spectroscopy and Gas Chromatography (GC) techniques at T = 298 ± 2 K and 760 Torr in dry conditions. The rate coefficients and branching ratios were also ev...

In this study the aerosol acidity was calculated using three different approaches in order to assess the temporal variation of aerosol pH in a rural site of Northern France. Aerosol acidity was estimated using three approaches: (i) the ion balance (IB), (ii) the ISORROPIA II model and (iii) a combination of the ISORROPIA ouput and the NH4+/NH3 equi...

A method coupling automated thermal desorption (ATD) with in-tube derivatization and solid phase micro-extraction (SPME), with on-injector derivatization gas chromatography - tandem mass spectrometry (GC/MSMS) was developed and used for the simultaneous quantification of 100 semivolatile (SVOCs) pollutants (50 pesticides, 16 PAHs, 22 PCBs, 7 phthal...

In this work, kinetics, product formation, chemical mechanism and SOA formation for the gas-phase reaction of trans-2-hexenal (T2H) with O3 are examined using four complementary experimental setups at 298±2 K and atmospheric pressure. Product studies were conducted in two contrasted experimental conditions, with and without OH radical scavenger. Th...

Photolysis is one the main drivers in atmospheric chemistry. Volatile organic compounds that bear one or more carbonyl functions can absorb UV light between 295 nm and 450 nm, enabling them to possibly photolyze in the atmosphere. Yet, very few data are available regarding the impact of such photolysis processes on the fate of multifunctional carbo...

To evaluate the chemical behavior and the health impact of welding fumes (WF), a complex and heterogeneous mixture of particulate metal oxides, two certified reference materials (CRMs) were tested: mild steel WF (MSWF-1) and stainless steel WF (SSWF-1). We determined their total chemical composition, their solubility, and their oxidative potential...

Atmospheric simulation chambers, are unique tools for investigating atmospheric processes in the gas and heterogeneous phases. They can provide a controlled yet realistic environment that simulates atmospheric conditions. In the current study, a Teflon atmospheric simulation chamber of 600 L, named THALAMOS (thermally regulated atmospheric simulati...

The reactions of five structurally similar unsaturated alcohols, i.e., (Z)-2-penten-1-ol, (E)-2-hexen-1-ol, (E)-3-hexen-1-ol, (Z)-3-hexen-1-ol, and 1-octen-3-ol, with Cl atoms in the gas phase, were investigated at 296 ± 2 K and 1 atm by the relative-rate kinetic technique using a 600-L Teflon reaction chamber. Selected ion flow tube mass spectrome...

In the presence of high concentrations of ammonia and nitric acid gas, the formation of ammonium nitrate particles (NH4NO3) is well established at low temperatures. As a result, high concentrations of ammonium nitrate particles are usually observed during the spring and winter period. Due to its semi-volatile nature, the measurement of ammonium nit...

Because of their size and price, miniature gas sensors are good candidates for long-term, large-scale, continuous monitoring of the air quality in confined environments, even in the presence of occupants. In spite of their still somewhat limited metrological performances, these tools are able to provide relevant information on the pollutants spatia...

Commercial miniature gas sensors, because they are smaller and cheaper than conventional instruments, can be deployed in large numbers to investigate indoor air quality, for research and operational purposes. To compensate for their limited metrological performances, it is necessary to develop relevant data treatment procedures. We applied an unsup...

In order to clarify whether the mitochondrial dysfunction is closely related to the cell homeostasis maintenance after particulate matter (PM2.5) exposure, oxidative, inflammatory, apoptotic and mitochondrial endpoints were carefully studied in human bronchial epithelial BEAS-2B, normal human bronchial epithelial (NHBE) and chronic obstructive pulm...

Even though clinical, epidemiological and toxicological studies have progressively provided a better knowledge of the underlying mechanisms by which air pollution-derived particulate matter (PM) exerts its harmful health effects, further in vitro studies on relevant cell systems are still needed. Hence, aiming of getting closer to the human in vivo...

The UV absorption spectrum and the photolysis reaction kinetics of 4-hydroxy-3-hexanone (4H3H) in the 275–330 nm region have been investigated for the first time. The photolysis frequency of this compound in the atmosphere was evaluated using actinometry and found to be J4H3H,atm = (5.9 ± 3.1) × 10⁻³ h⁻¹. An atmospheric effective quantum yield was...

Hybrid polyaniline (PANI) nanocomposites were prepared by chemical oxidative polymerization of aniline in the presence of different metal oxide nanoparticles (TiO2 in rutile and anatase forms, SnO2). Influence of the near ultraviolet (UV) light on synthesized materials properties and possibility of polymer phase photocatalytic degradation were inve...

According to the literature, tiny amounts of transition metals in airborne fine particles (PM2.5) may induce proinflammatory cell response through reactive oxygen species production. The solubility of particle-bound metals in physiological fluids, i.e. the metal bioaccessibility is driven by factors such as the solution chemical composition, the co...

The reaction of 4-hydroxy-4-methyl-2-pentanone (4H4M2P) with Cl atoms was studied for the first time experimentally and theoretically. Relative kinetic measurements were carried out at room temperature and 1 bar of synthetic air/N2 in two different environmental chambers: a 300 l Teflon bag and a 16 L borosilicate glass cell. Reactants, reference c...

Cet article présente un tour d’horizon de quelques-unes des thématiques de recherche développées en région Hauts-de-France dans les domaines de la chimie durable et de la chimie de l’environnement.

The ozonolysis of limonene was investigated in a laminar aerosol flow reactor under dry conditions enabling the first nucleation/condensation steps to be studied. The effect of scavengers of stabilized Criegee Intermediates (sCI) and OH radicals on secondary organic aerosol (SOA) formation was evaluated in terms of particle size distribution, aeros...

A method coupling automated thermal desorption and gas chromatography-tandem mass spectrometry was developed and used for the quantification of 16 PAHs (acenaphthene, anthracene, benzo[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, benzo[e]pyrene, benzo[g,h,i]perylene, benzo[k]fluoranthene, chrysene, dibenzo[a,h]anthracene, fluoranthene, fluor...

Carbonyls play an important role in atmospheric chemistry due to their formation in the photooxidation of biogenic and anthropogenic volatile organic compounds and their high atmospheric reactivity. The Cl-initiated kinetics of two α-diketones (2,3-pentanedione (PTD) and 2,3-hexanedione (HEX)) have been determined as well as the OH + HEX rate const...

This study provides the first kinetic and mechanistic study of the photolysis of 4-hydroxy-4-methyl-2-pentanone (4H4M2P) and the determination of the temperature dependence of the relative rate coefficient for the reaction of OH radicals with 4H4M2P. The UV absorption spectrum of 4H4M2P was determined in the spectral range 200–360 nm. The photolysi...

Standard air quality instruments are not adapted for long-term continuous and real-time monitoring of indoor environments. A promising alternative resides in using miniature gas sensors, which are low-cost devices capable to monitor air pollutants, even at low concentrations. In the present study, we investigate with electronic gas multisensors sys...

Using combination of open-circuit potential (OCP) and pH profiles of the aniline polymerization and their mathematical treatment, we develop the new convenient semi-quantitative approach to find influence of the dispersion of nanophase (on the example of TiO2 nanoparticles) on kinetic features of this process and molecular mass of the forming polya...

While the knowledge of the underlying mechanisms by which air pollution-derived particulate matter (PM) exerts its harmful health effects is still incomplete, detailed in vitro studies are highly needed. With the aim of getting closer to the human in vivo conditions and better integrating a number of factors related to pre-existing chronic pulmonar...

The atmospheric compounds which are emitted by natural or anthropogenic sources, can be transformed, transported on long range and transferred towards the ecosystems under the atmospheric deposition process. These compounds can generate pollution events which forecast is useful for public health and natural ecosystems protection. During the last th...

Les composes atmospheriques, qu’ils soient de sources naturelles ou anthropiques, peuvent etre transformes, transportes sur de longues distances et transferes de l’atmosphere vers un autre reservoir via les retombees atmospheriques. Ces composes, bien que presents a l’etat de trace, peuvent generer des evenements de pollution, dont la prevision est...

We demonstrate here strong influences of the content of polyaniline (PANI) doped with dodecylbenzenesulfonic acid (DBSA) and the nature of dispersing solvents chlorobenzene (CB) and dichloroacetic acid (DCAA) on the morphology and sensing properties of TiO2/PANI-DBSA hybrid nanocomposite layers cast on transducer electrodes. The obtained results ev...

Previous studies have provided some insight into the Saharan dust deposition at a few specific locations from observations over long time periods or intensive field campaigns. However, no assessment of the dust deposition temporal variability in connection with its regional spatial distribution has been achieved so far from network observations ove...

The long-distance effect of atmospheric pollution on ecosystems has led to the conclusion of international agreements to regulate atmospheric emissions and monitor their impact. This study investigated variations in atmospheric deposition chemistry in France using data gathered from three different monitoring networks (37 stations) over the period...

Les dépôts atmosphériques peuvent causer des dommages importants aux milieux naturels. Des mesures à long terme issues de la surveillance des dépôts atmosphériques en France ont été exploitées pour construire un modèle statistique prévisionnel afin d'estimer les changements de la composition chimique des dépôts atmosphériques à l'horizon 2020-2040....

Previous studies have provided some insight into the Saharan dust deposition at a few specific locations from observations over long time periods or intensive field campaigns. However, no assessment of the dust deposition temporal variability in connection with its regional spatial distribution has been achieved so far from network observations ove...

Dicarbonyls in the atmosphere mainly arise from secondary sources as reaction products in the degradation of a large number of volatile organic compounds (VOC). Because of their sensitivity to solar radiation, photodissociation of dicarbonyls can dominate the fate of these VOC and impact the atmospheric radical budget. The photolysis of 2,3-pentane...

Indoor and outdoor airborne particles, CO, CO2 levels and comfort parameters were monitored at two naturally ventilated elementary schools (S1 and S2). This paper studies the variation of ventilation rate during lectures, recreations, lunchtime and after class. Additionally, mass balance equations were used to estimate the particle deposition rates...

Hydroxyketones are key secondary reaction products in the atmospheric oxidation of volatile organic compounds (VOCs). The fate of these oxygenated VOCs is however poorly understood and scarcely taken into account in atmospheric chemistry modeling. In this work, a combined investigation of the photolysis and temperature-dependent OH radical reaction...

The gas-phase ozonolysis of three methylated alkenes, i.e., trans-2,2-dimethyl-3-hexene (22dM3H), trans-2,5-dimethyl-3-hexene (25dM3H), and 4-methyl-1-pentene (4M1P), has been investigated in the presence of sufficient hydroxyl radical scavenger in a laminar flow reactor at ambient temperature (296 ± 2 K) and P = 1 atm of dry air (RH ≤ 5%). Ozone l...

Due to their potential, electronic gas sensors networks, especially those based on metal oxide semi-conducting materials, are currently the subject of active research for many applications, including air pollution. Indoor air quality (IAQ) receives an increasing attention because of long-term occupancy of confined environments with high specific po...

Passive samplers have recently been proposed as simple and inexpensive tools to measure emissions of Volatile Organic Compounds (VOCs) from building and furnishing materials. These samplers can be used to pinpoint strong emitters of targeted pollutants, including hydrocarbons and oxygenated VOCs, which is of great interest to design efficient strat...

New ammonia and amine sensing materials based on hybrid polyaniline/titanium dioxide nanocomposites were synthesized by a one-pot chemical polymerization. Particular attention was paid to the influence of TiO2 nanoparticles and the surface active dopants on the structure–property relationship of the nanocomposites in terms of their morphology, comp...

The kinetics of the reactions of limonene with OH and OD radicals has been studied using a low pressure flow tube reactor coupled with a quadrupole mass spectrometer: OH + C10H16 -> products (1), OD + C10H16 -> products (2). The rate constants of the title reactions were determined using four different approaches: either monitoring the kinetics of...

Saharan dust is frequently transported toward Europe over the Mediterranean basin. When deposited in oceanic areas, mineral dust can constitute a key input of nutrients for the oceanic biosphere. For instance, Saharan dust deposited into the Mediterranean Sea can be a significant source of nutrient like Fe, P and N during summer and autumn. Our obj...

While indoor air quality issues have received increasing attention the past decades, detailed investigations of primary sources of indoor pollution are still difficult to carry out. There is a lack of analytical tools and measurement procedures to identify sources of pollutants and to characterize their emissions. Formaldehyde is a ubiquitous pollu...

This work investigates the feasibility of indoor use of Wood Plastic Composites (WPCs) manufactured from recycled materials initially intended for landfill. WPCs were manufactured using recycled wood chips and recycled polyethylene (rPE) / recycled polypropylene (rPP). VOCs and formaldehyde emissions from recycled wood chips and plastic polymer wer...

Passive flux samplers (PFS) have recently been proposed as simple and inexpensive tools to measure indoor emissions of Volatile Organic Compounds (VOCs) from building and furnishing materials. These devices can be used to pinpoint strong emitters of targeted compounds, including hydrocarbons and oxygenated VOCs. Three PFS have been developed at Min...

Monitoring of indoor air quality in French public buildings has been enacted by the 2011-1728 decree and will be compulsory by 2015. A national pilot study has been initiated in 2009 to assess the needs for air quality monitoring in buildings receiving children. Concentrations of formaldehyde and benzene, as well as confinement parameters, were mea...

Monitoring of indoor air quality in French public buildings has been enacted by the 2011-1728 decree and will be compulsory by 2015. A national pilot study has been initiated in 2009 to assess the needs for air quality monitoring in buildings receiving children. Concentrations of formaldehyde and benzene, as well as confinement parameters, were mea...

A new flow reactor has been developed to study ozonolysis reactions at ambient pressure and room temperature (297 ± 2 K). The reaction kinetics of O(3) with 4-methyl-1-pentene (4M1P), 2-methyl-2-pentene (2M2P), 2,4,4-trimethyl-1-pentene (tM1P), 2,4,4-trimethyl-2-pentene (tM2P) and α-pinene have been investigated under pseudo-first-order conditions....

The HO2 radical is one of the most important intermediate species in atmospheric chemistry. We report on the development of a new photoreactor with first in-situ measurement of HO2 radical photostationary concentrations using continuous wave cavity ring-down spectrometry (cw-CRDS). Characterization of the actinic photon flux was carried out by NO2...

The kinetics of the overall reaction between OH radicals and 2,3-pentanedione (1) were studied using both direct and relative kinetic methods at laboratory temperature. The low pressure fast discharge flow experiments coupled with resonance fluorescence detection of OH provided the direct rate coefficient of (2.25 ± 0.44) × 10(-12) cm(3) molecule(-...

http://www.emse.fr/~batton/Presentations/Pascaud-final.pdf

We report on the development of a new environmental simulation chamber coupled with an in situ continuous wave cavity ring-down spectrometer operating in the near IR (∼1.5 μm). The first application reported in this paper dealt with the chemical mechanism of UV photolysis of methyl nitrite (CH(3)ONO) in air. HONO has been detected for the first tim...

HO2 Radical / CRDS / Kinetics / Atmospheric Simulation Chamber The HO2 radical is one of the most important intermediate species in atmospheric chemistry. We report on the development of a new photoreactor with first in-situ measurement of HO2 radical photostationary concentrations using continuous wave cavity ring-down spectrometry (cw-CRDS). Char...

Les composés hydrocarbonés non méthaniques (HCNM) jouent un rôle prépondérant dans la chimie de l’atmosphère puisqu’ils interviennent en tant que précurseurs de la formation de polluants secondaires comme l’ozone ou les aérosols organiques secondaires. Disposant d’une base de données conséquente d’au moins cinq années de mesures systématiques de 46...

Aromatic and biogenic compounds, known to be relatively abundant in the atmosphere, are usually easily oxidized by common tropospheric species (OH, O(3), NO(3)), which contributes significantly to the formation of low vapor pressure products, considered as the main precursors of SOA. In order to improve the understanding of SOA formation mechanisms...

Since 1990, the MERA (MEsure des Retombées Atmosphériques, French acronym for background air pollution monitoring) network has been focused on the composition of the lower troposphere within the EMEP program. In particular, 46 non-methane hydrocarbon (NMHC) concentrations have been measured between 1997 and 2006 at three MERA sites. The analysis of...

Kinetics of the •OH-initiated reactions of acetic acid and its deuterated isomers have been investigated performing simulation chamber experiments at T = 300 ± 2 K. The following rate constant values have been obtained (± 1σ, in cm3 molecule−1 s−1): k 1(CH3C(O)OH + •OH) = (6.3 ± 0.9) × 10−13, k 2(CH3C(O)OD + •OH) = (1.5 ± 0.3) × 10−13, k 3(CD3C(O)O...

The hydroperoxyl radical HO2 belongs to these trace species of the atmosphere which play a crucial role in the tropospheric chemistry. In particular, it is responsible for the formation of OH radicals through the HO2 + NO reaction, the OH radical being the most important oxidant in the troposphere. The detection and quantification of the HO2 radica...

There is a considerable interest in quantifying near-surface ozone concentrations and associated trends, as they serve to define the impacts on ozone of the anthropogenic precursors reductions and to evaluate the effects of emission control strategies. A statistical test has been used to the ozone air concentrations measured in the French rural mon...

Measurements of ozone and other trace species in the European EMEP network in 2003 are presented. The European summer of 2003 was exceptionally warm and the surface ozone data for central Europe show the highest values since the end of the 1980s. The 99 percentiles of daily maximum hourly ozone concentrations in 2003 was higher than the correspondi...

Investigations on long term trends of non-methane hydrocarbons (NMHCs) in rural areas are of interest for a better understanding of tropospheric ozone concentration. NMHC were measured on a French rural site from 2002 to 2005, as part of the EMEP program. First, the examination of the levels and trends showed a global decrease in NMHCs. These resul...

The long-term monitoring of precipitation and its chemical composition are important for identifying trends in rain quality and for assessing the effectiveness of pollution control strategies. A statistical test has been used to the atmospheric concentrations measured in the French rural monitoringnetwork (MERA) in order to bring out spatiotemporal...

The coupling between cavity ring-down spectroscopy (CRDS) and an environmental chamber in the investigation of photo-induced reaction mechanisms is demonstrated for the first time. The development of the CRDS device and the corresponding analytical performances are presented. The first application is devoted to the investigation of the branching ra...

The branching ratio for the reaction of OH radicals with CH3COOD was determined at 298 2±K and at atmospheric pressure using an indoor smog chamber (300 L) coupled to two different detection systems: (i) Gas Chromatograph (GC) with FTIR detection for determination of [CH3COOD], (ii) Cavity Ring Down Spectroscopy (CRDS) using a telecommunication dio...

Although anthropogenic emissions of volatile organic compounds (VOCs) in France seem to decrease for several years, the part of oxygenated VOCs remains constant. Among these compounds, carboxylic acids have become an issue of growing interest in the past two decades. Low molecular weight carboxylic acids like acetic acid have been recognized as po-...