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Keeping the work atmosphere clean of volatile organic compounds / Stephen H. Klostermeyer in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 26, N° 4 (04/2019)
[article]
Titre : Keeping the work atmosphere clean of volatile organic compounds : Regenerative thermal oxidizers can be the most effective and cost-efficient way to destroy VOCs in the adhesives and sealants industry Type de document : texte imprimé Auteurs : Stephen H. Klostermeyer, Auteur Année de publication : 2019 Article en page(s) : p. 32-34 Langues : Américain (ame) Catégories : Composés organiques volatils -- Oxydation
Oxydants
Oxydation thermique
Polluants -- Détérioration
Polluants atmosphériques
Polluants organiques
Revêtements
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The manufacture and application of solvent-based adhesives and coatings release significant emissions of volatile organic compounds (VOCs) into the environment. When evaporated, these VOCs react with nitrogen oxide (NOx) in the presence of sunlight to form ground level ozone; as such, they are regulated as an ozone precursor under the U.S. Environmental Protection Agency’s (EPA) criteria pollution program. In sufficient quantities, VOCs can cause adverse effects on human health, including eye, nose and throat irritations; headaches; dizziness; visual disorders; and memory impairment.
VOCs and hazardous air pollutants (HAPs) are regulated by federal, state and local regulatory agencies through guidelines established by the Clean Air Act. The EPA has developed National Emission Standards for Hazardous Air Pollutants (NESHAP) for paint manufacturing facilities and numerous coating application industries. In general, these regulations limit the amount of VOC emissions (usually quantified in tons allowed) that can be emitted. Emissions limits differ across industries and locations.
While great strides have been made by industry to reduce air pollution, including the development of water- and powder-based materials, many solvent-based coatings are necessary to improve product performance and extend product life. VOCs are typically found in the following areas in coatings manufacturing or in surface coating operations:
- Coatings application stations or booths
- Flash-off areas (low air movement)
- Curing or bake oven exhaust (a large majority of emissions are found in this step)
- Paint storage areas
- Paint mix areas
- Storage tanksNote de contenu : - Controlling emissions
- Silicone coatingsEn ligne : https://www.adhesivesmag.com/articles/96877-keeping-the-work-atmosphere-clean-of [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32460
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 26, N° 4 (04/2019) . - p. 32-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20841 - Périodique Bibliothèque principale Documentaires Disponible Status quo on identified transformation products of organic ultraviolet filters and their persistence / Franziska Jentzsch in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° S1 (10/2023)
[article]
Titre : Status quo on identified transformation products of organic ultraviolet filters and their persistence Type de document : texte imprimé Auteurs : Franziska Jentzsch, Auteur ; Klaus Kümmerer, Auteur ; Oliver Olsson, Auteur Année de publication : 2023 Article en page(s) : p. 101-126 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques -- Aspect de l'environnement
cosmétiques -- Produits chimiques
Micropolluants
Photostabilité
Polluants -- Détérioration
Produits antisolaires
Produits chimiques -- BiodégradationIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Organic micropollutants of concern-including organic UV filters (UVF)-are getting increasing attention. Personal care products such as sunscreens or cosmetic articles often contain large quantities of UVF. These substances enter the environment either directly (during outdoor activities) or indirectly (via sewages from households). Therefore, the removal or degradation of UVF by natural or technical treatment processes is important to understand. UVF are often incompletely removed and transformed to side products of incomplete mineralization by abiotic and biotic processes. An extensive overview on transformation products (TPs) is essential to systematically identify knowledge gaps and to derive research needs. While there are many reviews on the UVF themselves, the number of reviews which focus on their TPs is limited. Consequently, this review gives an overview on the latest findings regarding TPs of UVF. In this publication, known TPs of UVF, which were formed during abiotic and biotic processes, are reviewed. Target substances were defined and a literature database was reviewed for studies on TPs of the target substances. The first list of studies was shortened stepwise, thus generating a final list of studies which contained only the relevant studies. Since biodegradation is one of the most important pathways for removal of organic compounds from the environment, this review presents an overview on known TPs of organic UVF and their biodegradability, which determines their environmental fate. In this way, all identified TPs of UVF were listed and checked for information on their biodegradability. A total of 2731 records of studies were assessed. Forty-two studies, which assessed 46 processes that lead to the formation of identified TPs, were included in this review. One hundred and seventyseven different TPs resulting from 11 different UVF were identified. Little to no data on the biodegradability was found for TPs. This indicates a severe lack of data on the biodegradability of TPs of organic UVF substances. Since most TPs lack information on biodegradability, further research should provide information on both-identity and biodegradability-of formed TPs to be able to assess their hazardousness for the environment. Note de contenu : - METHODS : Target substance selection - Generation of the final data set - Documentation and handling of the final data set - Refactoring of the final data set - Addition of quality markers to the final data set - Biodegradability of the TPs listed in the final literature data set
- DEVELOPMENT OF AVAILABLE INTERNATIONAL SCIENTIFIC STUDIES ON UV FILTERS AND THEIR TRANSFORMATION PRODUCTS
- OUTCOME AND INSIGHTS OF THE LITERATURE SEARCH
- INCOMPLETE DEGRADATION OF UV FILTERS BY ABIOTIC AND BIOTIC PROCESSES
- TRANSFORMATION PRODUCTS OF UV FILTER AND UV FILTER MIXTURES
- STABILITY OF TRANSFORMATION PRODUCTS OF UV FILTER : Biodegradability - Photostability - In silico assessment of stability - Interim conclusion on the stability of UVF-TPs according to the reviewed literature - Biodegradability of UVF-TPs according to the ECHA (database) reports
- CHALLENGES REVIEWING TRANSFORMATION PRODUCTS OF UV FILTERS AND THEIR BIODEGRADABILITY
- CONSEQUENCES FOR THE ENVIRONMENTAL PERSPECTIVE AND RECOMMENDATIONS FOR FURTHER RESEARCH
- Table 1 : Overview of 46 abiotic and biotic processes of 11 UVF reported in 42 studies (n = number of studied processes)
- Table 2 : List of all reviewed TPs (TPtotal: 187) of 11 UV filter substances and one mixture, assigned with name, CAS number and relevant transformation process
- Table 3 : Overview on the stability of certain TPs (extracted from literature, limited by data availability)
- Table 4 : Shortened list of the TPs (based on list of TPtotal) for which the literature and/or ECHA database (April 2022) provided information on the stabilityDOI : https://doi.org/10.1111/ics.12908 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/ics.12908 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40255
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° S1 (10/2023) . - p. 101-126[article]