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1. The Use of Sensor-based System to Measure Accurate Low Odorant Concentrations

Author

Irene Lara-Ibeas, Javier Fernandez-Huerta, and Edurne Ibarrola-Ulzurrun

Subjects
Chemical engineering, TP155-156, Computer engineering. Computer hardware, TK7885-7895
Abstract

Odour pollution has become a growing concern due to industrialization and public awareness of the importance of preserving a clean environment. Although odours may not pose immediate health risks at low concentrations, prolonged exposure can lead to various adverse effects on human health and socio-economic conflicts. In response to this concern, Instrumental Odour Monitoring Systems (IOMS) are emerging as a solution for real-time monitoring of odour emissions. The present work shows the performance of sensor-based Kunak AIR Pro instrument for odour monitoring at different sites including a WWTP, a sludge treatment plant and a petrochemical plant by accurately measuring low concentrations of H2S, VOCs and NH3. In the WWTP, the performance of the system to monitor H2S in terms of precision and accuracy was evaluated against a H2S analyser showing a high correlation coefficient of 0.77 and a low MAE of 6.9 ppb. Considering an H2S odour threshold of 8 ppb, the TPR and FPR were calculated to be 0.87 and 0.34. By setting a more conservative alarm threshold (20 ppb), TPR and FPR can be improved to 0.89 and 0.16, respectively. Moreover, by combining the complementary responses of different sensors, such as those for H2S and VOCs, emissions of additional compounds can be inferred, increasing the capabilities of these systems. In a sludge treatment and a petrochemical plant, the deployment of monitoring devices for VOCs, H2S, and NH3 and meteorological data provided valuable insights into the temporal variations and spatial distribution of these compounds within the studied facilities as well as into the potential identification of emission sources. This information is crucial for implementing proactive measures to minimize environmental impact and address potential odour issues demonstrating the importance of sensor-based monitoring systems in providing real-time data for informed decision-making.

Published
2024

4. Continuous real-time monitoring of formaldehyde over 5 weeks in two French primary schools: identification of the relevant time resolution and the most appropriate ventilation scenario

Author

Claire Trocquet, Irene Lara-Ibeas, Anaïs Becker, Aurélie Schulz, Pierre Bernhardt, Vincent Person, Béatrice Cormerais, Stéphanette Englaro, and Stéphane Le Calvé

Subjects
Atmospheric Science, Health, Toxicology and Mutagenesis, Management, Monitoring, Policy and Law, Pollution
Published
2023
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5. Adsorption of gaseous formaldehyde on Y zeolites and on metal-organic frameworks

Author

Anaïs Becker, Nizami Israfilov, Elise Ehrstein, Irene Lara-Ibeas, Jean-Marc Planeix, Benoît Louis, Stéphane Le Calvé, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Chimie de la matière complexe (CMC), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), This project has been supported by the European Union’s through the LIFE SMART IN’AIR – Smart indoor air monitoring network to reduce the impacts of pollutants on environment and health – under grant number LIFE17 ENV/FR/000330. We express our gratitude to theFrench Ministry of Foreign Affairs for providing the PhD scholarship of NI., and European Project: LIFE17 ENV/FR/000330,SMART IN'AIR

Subjects
History, Polymers and Plastics, Mechanics of Materials, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, General Materials Science, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, Business and International Management, Condensed Matter Physics, Industrial and Manufacturing Engineering
Abstract

International audience; Formaldehyde is a known carcinogen and a major indoor air pollutant, which has led the authorities to regulate its levels in the air. To reduce indoor airborne concentrations, several strategies can be adopted, namely the reduction of emissions or the elimination of this pollutant by different depollution processes. Among them, adsorption on highly porous solid materials remains one of the most efficient strategy. This study aims to provide experimental data on formaldehyde adsorption capacity over different microporous materials at realistic levels (~164 ppb), being representative of the performance of the investigated materials in a real environment. For that purpose, gaseous formaldehyde breakthrough experiments were performed under laboratory-controlled conditions over several porous solids: focusing on cation-exchanged zeolites and metalorganic frameworks (MOFs). These materials were fully characterized in terms of textural and structural properties. Cu-based MOFs acted as more promising HCHO adsorbents than zeolites, exhibiting at least one order of magnitude higher adsorption capacity under realistic indoor conditions. Among MOFs, SUM-102 (Strasbourg University Material) exhibited the highest surfacic adsorption capacity (0.52 μg HCHO m − 2), yielding more than 1 kg HCHO adsorbed per m 3 sorbent being superior to the zeolite family by at least one order of magnitude.

Published
2022
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7. Continuous aldehydes monitoring in primary schools in France: Evaluation of emission sources and ventilation practices over 5 weeks

Author

Irene Lara-Ibeas, Pierre Bernhardt, Aurélie Schulz, Claire Trocquet, Stéphanette Englaro, Béatrice Cormerais, Stéphane Le Calvé, Le Calvé, Stéphane, In’Air Solutions [Strasbourg, France], Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Direction Santé Publique de la Ville de La Rochelle, This work has been conducted in the framework of IMPACT’AIR project financially supported by ADEME (Agence De l'Environnement et de la Maîtrise de l'Energie), the city of La Rochelle and the Ligue contre le cancer., Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), and Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Atmospheric Science, [CHIM.ANAL] Chemical Sciences/Analytical chemistry, 010504 meteorology & atmospheric sciences, indoor air, schools, 010501 environmental sciences, 01 natural sciences, Hexanal, law.invention, chemistry.chemical_compound, Animal science, Indoor air quality, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, law, Waste Management and Disposal, Field campaign, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Aldehydes, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.IE]Environmental Sciences/Environmental Engineering, ventilation, Acetaldehyde, Propionaldehyde, Pollution, chemistry, 13. Climate action, hexanal, Ventilation (architecture), Environmental science, [SDE.IE] Environmental Sciences/Environmental Engineering, acetaldehyde
Abstract

This paper presents a field campaign conducted in two French elementary schools for 5 weeks aiming at identifying effects of occupation and ventilation practices on indoor aldehyde concentrations and discriminating aldehyde emission from building materials and furniture. The investigated classrooms were first empty and not occupied whereas the furniture was added the following week. Normal school activities were restarted for the last three weeks under various ventilation practices. C2–C7 aldehydes concentrations were monitored with the conventional method based on DNPH derivatization using active sampling followed by off-line HPLC/UV analysis. Acetaldehyde (AA) and hexanal (HA) were the two main aldehydes present if formaldehyde is not considered. The weekly mean values of acetaldehyde concentrations were found in the range 9.5–13.1 μg m−3 (School 1), 9.4–17.6 μg m−3 (School 2) and equal to 5.3 μg m−3 (School 3). In Schools 2 and 3, weekly hexanal concentrations ranged between 3.3 and 5.4 μg m−3 but increased up to 40.1 μg m−3 in school 1 where painting work was performed during the week 2. Smaller amount of propionaldehyde (PA) and benzaldehyde (BA) were always detected, their weekly average concentrations being in the range 0.4–4.0 μg m−3 and 0.9–2.7 μg m−3 for PA and BA, respectively. The results supported by Student's tests show that building materials and furniture contribute to aldehyde emissions while ventilation significantly improves indoor air quality without being able to privilege one of the three ventilation scenarios tested.

Published
2021
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8. Adsorptive removal of gaseous formaldehyde at realistic concentrations

Author

Cristina Megías-Sayago, Benoit Louis, Irene Lara-Ibeas, Stéphane Le Calvé, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Strasbourg, Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), European Project: LIFE17 ENV/FR/000330,SMART IN'AIR, Le Calvé, Stéphane, Smart indoor air monitoring network to reduce the impacts of pollutants on environment and health - SMART IN'AIR - LIFE17 ENV/FR/000330 - INCOMING, Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
inorganic chemicals, [CHIM.ANAL] Chemical Sciences/Analytical chemistry, Inorganic chemistry, Formaldehyde, chemistry.chemical_element, zeolites, 02 engineering and technology, indoor air, 010501 environmental sciences, 01 natural sciences, complex mixtures, chemistry.chemical_compound, Adsorption, Aluminium, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Chemical Engineering (miscellaneous), Molecule, Waste Management and Disposal, 0105 earth and related environmental sciences, gas analysis, [SDE.IE]Environmental Sciences/Environmental Engineering, Process Chemistry and Technology, Mesoporous silica, 021001 nanoscience & nanotechnology, Pollution, realistic concentrations, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry, chemistry, adsorption, formaldehyde, Metal-organic framework, [SDE.IE] Environmental Sciences/Environmental Engineering, 0210 nano-technology, Brønsted–Lowry acid–base theory, Carbon
Abstract

Due to analytical reasons, adsorption capacity is often determined at very high concentrations which is not representative of a real environment. The aim of this work is to provide experimental data of formaldehyde adsorption capacity at realistic levels (∼164 ppb) thanks to a near real-time powerful formaldehyde analyser recently developed in our laboratory. Gaseous formaldehyde breakthrough experiments were conducted on a broad spectrum of materials including carbon, zeolites, metal organic framework and mesoporous silica in order to determine their adsorption capacity. Among these materials, HKUST-1 exhibited the highest adsorption capacity (504 μg/g ads) followed by MgZSM-5 (35 μg /g ads), SBA-16 (29 μg/g ads), ZSM-5 (10–26 μg/g ads) and Carbopack® B (4 μg/g ads). In the case of ZSM-5 zeolites, the results revealed that formaldehyde adsorption was related to their aluminium content. The presence of aluminium implies more bridging hydroxyl groups Si-(OH)-Al that act as Bronsted acid sites interacting with formaldehyde molecules. Despite the moderate adsorption capacity of ZSM-5 zeolites, they can be considered as promising candidates for gas analysis applications, for example where a good analytical blank is essential for accurate measurements.

Published
2020
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9. Adsorbent screening for airborne BTEX analysis and removal

Author

Irene Lara-Ibeas, Rubén Ocampo-Torres, Benoit Louis, Stéphane Colin, Cristina Megías-Sayago, Alberto Rodríguez-Cuevas, Stéphane Le Calvé, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), In’Air Solutions [Strasbourg, France], Institut de Chimie de Strasbourg, Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), European Project: 687014,H2020,H2020-CS2-CFP01-2014-01,MACAO(2016), European Project: LIFE17 ENV/FR/000330,SMART IN'AIR, Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Le Calvé, Stéphane, Research and training network on MIniaturized Gas flow for Applications with enhanced Thermal Effects - MIGRATE - - H20202015-11-01 - 2019-10-31 - 643095 - VALID, Development of VOCs and ozone Micro-analysers based on microfluidic devices for Aircraft Cabin Air mOnitoring - MACAO - - H20202016-02-01 - 2019-07-31 - 687014 - VALID, Smart indoor air monitoring network to reduce the impacts of pollutants on environment and health - SMART IN'AIR - LIFE17 ENV/FR/000330 - INCOMING, Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi)

Subjects
[CHIM.ANAL] Chemical Sciences/Analytical chemistry, air pollution, 02 engineering and technology, BTEX, 010501 environmental sciences, 01 natural sciences, chemistry.chemical_compound, Adsorption, [CHIM.GENI]Chemical Sciences/Chemical engineering, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Desorption, Air treatment, Chemical Engineering (miscellaneous), Benzene, Waste Management and Disposal, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.GENI] Chemical Sciences/Chemical engineering, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, Chemistry, [SDE.IE]Environmental Sciences/Environmental Engineering, Process Chemistry and Technology, Microporous material, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Pollution, Toluene, Chemical engineering, 13. Climate action, desorption, air treatment, [SDE.IE] Environmental Sciences/Environmental Engineering, 0210 nano-technology, Mesoporous material
Abstract

Adsorption is a commonly used technique for removal and analysis of gaseous pollutants due to its cost efficiency at low concentrations. In this work, single and competitive BTEX adsorptions were studied on three non-porous, mesoporous and microporous commercial adsorbents, namely Carbopack® B, SBA-16 and HKUST-1, respectively. For all these materials, C8 aromatics were preferentially adsorbed, preventing in some cases the adsorption of the most volatile species, i.e. benzene and toluene. This behavior indicates that the competition phenomenon is closely related to the strength of adsorbate-adsorbent interactions. Activation energies for the desorption process were determined to be 33.8 and 33.7 and 35.9 kJ/mol for Carbopack® B, SBA-16 and HKUST-1, respectively, demonstrating that stronger interactions are present in microporous materials. Among the investigated adsorbents, SBA-16 seems to be the best candidate for air treatment and analysis since it exhibited high adsorption capacity, moderate hydrophobicity, minimal roll-up and low activation energy for the desorption. The experimental results obtained illustrate the complexity of multicomponent adsorption process on materials with different porosity and surface chemistry.

Published
2020
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10. Conception and development of microfabricated elements for microfluidic analytical devices

Author

Stéphane Le Calvé, Dimitris Valougeorgis, Alireza Sharifi, Stéphane Colin, Irene Lara-Ibeas, Christina Andrikopoulou, Vincent Person, Colin, Stéphane, Development of VOCs and ozone Micro-analysers based on microfluidic devices for Aircraft Cabin Air mOnitoring - MACAO - - H20202016-02-01 - 2019-07-31 - 687014 - VALID, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), University of Thessaly [Volos] (UTH), Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), European Project: 687014,H2020,H2020-CS2-CFP01-2014-01,MACAO(2016), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), and Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Consumption (economics), [PHYS]Physics [physics], 0209 industrial biotechnology, Computer science, 010401 analytical chemistry, Microfluidics, Nanotechnology, lcsh:A, 02 engineering and technology, 01 natural sciences, 0104 chemical sciences, [PHYS] Physics [physics], Software portability, 020901 industrial engineering & automation, Low energy, n/a, lcsh:General Works
Abstract

International audience; Portability and low energy consumption are of a great importance for on-site real-time monitoring of indoor air quality. Therefore, this work is focused on the miniaturization of the elements which are the bulkiest and require the highest energy supply in analytical devices. More specifically, micro-fabrication techniques were deployed so that a pre-concentrator and a gas chromatography micro-column with integrated heaters and temperature sensors were developed on silicon wafers of small dimensions of 20 mm × 12 mm and 50 mm × 50 mm, respectively. Heating elements and sensors were fabricated by thermal evaporation of titaniumand gold. In the GC micro-column, four resistances of 82 Ω allow a temperature increase up to 200 °C in 150 s whereas two 430 Ω resistances function as sensors. In the case of the pre-concentrator, three different designs containing heaters of 50-8446 Ω and sensors of 117-555 Ω were proposed in order to investigate the most appropriate configuration to achieve a temperature increase up to 250 °C in 10 s. Furthermore, a study of wet etching kinetics of Si with KOH (40%) was performed to evaluate its suitability for the fabrication of micro-channels. Silicon etching rates were determined to be between 14.7 and 63.1 µm/h at different temperatures from 50-80 °C. Afterwards, three GC micro-columns of 1, 2 and 3 m in length containing 106 and 146 µm deep microchannels were etched using KOH (40%) at 70 °C, thus demonstrating that wet etching is an alternative and cheaper technique to fabricate micro-columns.

Published
2017
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11. Dispositifs de préconcentration microfluidiques pour l'analyse de COV par chromatographie en phase gazeuse

Author

Irene Lara-Ibeas, Alberto Rodríguez-Cuevas, Christina Andrikopoulou, Pauline Meyer, Vincent Person, Trocquet, C., Ruben Ocampo Torres, Michel Wolf, Lucien Baldas, Stéphane Colin, Stéphane Le Calvé, Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), In’Air Solutions [Strasbourg, France], European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), European Project: 687014,H2020,H2020-CS2-CFP01-2014-01,MACAO(2016), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), BALDAS, Lucien, Research and training network on MIniaturized Gas flow for Applications with enhanced Thermal Effects - MIGRATE - - H20202015-11-01 - 2019-10-31 - 643095 - VALID, Development of VOCs and ozone Micro-analysers based on microfluidic devices for Aircraft Cabin Air mOnitoring - MACAO - - H20202016-02-01 - 2019-07-31 - 687014 - VALID, Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi)

Subjects
[CHIM.ANAL] Chemical Sciences/Analytical chemistry, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, micro-GC, VOCs, [SPI.MECA.MEFL] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], préconcentrateur, microfluidique, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, air intérieur, BTEX, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
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