Relevant bibliographies by topics / (halogenated) volatile organic compounds

Academic literature on the topic '(halogenated) volatile organic compounds'

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Published: 12 May 2023

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Journal articles on the topic "(halogenated) volatile organic compounds"

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McGrath, Michael. "Catalytic destruction of halogenated volatile organic compounds." Applied Catalysis B: Environmental 3, no. 2-3 (February 1994): N12. http://dx.doi.org/10.1016/0926-3373(94)80002-2.

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Laturnus, Frank, Christian Wiencke, and Heinz Klöser. "Antarctic macroalgae — Sources of volatile halogenated organic compounds." Marine Environmental Research 41, no. 2 (January 1996): 169–81. http://dx.doi.org/10.1016/0141-1136(95)00017-8.

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HIROSE, YOSHIFUMI, RYUJI MATSUMOTO, SAYURI YAMADA, TOMIO NOZAKA, MASAZO ISHINO, and AKIO TANAKA. "The Determination of Volatile Halogenated Organic Compounds in Drugs." Eisei kagaku 40, no. 3 (1994): 298–301. http://dx.doi.org/10.1248/jhs1956.40.298.

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Tratnyek, Paul G., Elizabeth Edwards, Lucy Carpenter, and Sarah Blossom. "Environmental occurrence, fate, effects, and remediation of halogenated (semi)volatile organic compounds." Environmental Science: Processes & Impacts 22, no. 3 (2020): 465–71. http://dx.doi.org/10.1039/d0em90008g.

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Guest editors Elizabeth Edwards, Lucy Carpenter, Sarah Blossom and Paul Tratnyek introduce the Halogenated (semi)volatile organic compounds themed issue of Environmental Science: Processes & Impacts.
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Kos, Gregor, Visahini Kanthasami, Nafissa Adechina, and Parisa A. Ariya. "Volatile organic compounds in Arctic snow: concentrations and implications for atmospheric processes." Environ. Sci.: Processes Impacts 16, no. 11 (2014): 2592–603. http://dx.doi.org/10.1039/c4em00410h.

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Qu, Haoli, Jie Cao, Pengjun Wang, Ruirong Li, Zicheng Qi, Jingjing Fu, Yongsheng Chen, and Mingjiang Chen. "Volatile organic compounds and dominant bacterial community during aerobic composting of vegetable waste and cow manure co-complexing." BioResources 17, no. 1 (January 7, 2022): 1338–53. http://dx.doi.org/10.15376/biores.17.1.1338-1353.

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Vegetable waste was aerobically composed using a trough-type system, and the resulting emitted volatile organic compounds were investigated. In addition, the succession pattern of microorganisms was analyzed. Aerobic fermentation was conducted using a tomato stalk-cow dung mix (a water content of 65% and a carbon-to-nitrogen ratio of 25:1). The emitted volatile organic compounds comprised of 58 kinds of compounds, including 2 sulfur-containing compounds, 3 alcohols, 3 esters, 3 aldehydes, 3 ketones, 6 halogenated hydrocarbons, 18 aromatic hydrocarbons, 17 alkanes, and 3 alkenes. The primary volatile organic compounds produced were methyl sulfide, ethyl acetate, ethanol, and acetaldehyde. Clustering and principal coordinate analysis suggested that the community succession changed throughout the composting process in the odor-producing habitat. High-throughput sequencing revealed that the bacterial community was comprised of Firmicutes, Chloroflexi, Proteobacteria, and Actinobacteria, whereas the dominant flora included Ascomycota, Basidiomycota, and Mucoromycota. These findings could aid in the mitigation of volatile organic compounds and odors during vegetable waste composting as well as contribute to the development of deodorizing bacteria.
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Auer, Nicole R., and Detlef E. Schulz-Bull. "Stable Carbon Isotope Analysis of Anthropogenic Volatile Halogenated C1 and C2 Organic Compounds." Environmental Chemistry 3, no. 4 (2006): 268. http://dx.doi.org/10.1071/en06027.

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Environmental Context.Volatile halogenated organic compounds (VHOCs), ubiquitous trace gases of natural or man-made origin, have gained increasing attention due to their adverse health effects on humans and wildlife, and their potential for catalytic ozone destruction. However, it is difficult to confront VHOC emission budgets as the processes responsible for the formation and degradation of these compounds are complex, and their emission and persistence are affected by variations in the environment and climate. In order to understand VHOCs and reduce their environmental impact, it is necessary to study the isotopic composition of VHOCs produced by different sources, in addition to their concentrations and fluxes in the environment. In this paper, the determination of the carbon isotope range of VHOCs produced by human activities adds useful basic information for future studies of their environmental fate. Abstract. This paper presents the C13/C12 determination of 27 industrial volatile halogenated organic compounds (VHOCs) from different suppliers via gas chromatography combustion isotope-ratio mass spectrometry (GC-C-IRMS). A total of 60 samples, containing one or two carbon atoms, plus chlorine, bromine and iodine substituents, were analyzed to provide a basis for their further comparison with naturally produced VHOC δ13C values. The results indicate a wide range in the carbon isotope signature (–62‰ and –5‰). For chloroiodomethane alone, positive carbon isotope values of 33‰ (Fluka) and 59‰ (VWR International) were found. Each C1 and C2 compound has a distinctive carbon isotope composition, depending on the individual manufacturing reactions, the use of different carbon sources, differences in the composition of the same type of raw material and/or conditions during the manufacturing process. The last two factors are probably responsible for the δ13C discrepancies of ~5‰ found between manufacturers of the same compound. Larger deviations are mainly associated with different carbon isotope signatures of the reactant. Therefore, it is suggested that the reporting of a stable carbon isotope ratio for an anthropogenic VHOC include details of the manufacturing process or alternatively the supplier.
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Shechner, Moshe, Alex Guenther, Robert Rhew, Asher Wishkerman, Qian Li, Donald Blake, Gil Lerner, and Eran Tas. "Emission of volatile halogenated organic compounds over various Dead Sea landscapes." Atmospheric Chemistry and Physics 19, no. 11 (June 7, 2019): 7667–90. http://dx.doi.org/10.5194/acp-19-7667-2019.

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Abstract. Volatile halogenated organic compounds (VHOCs), such as methyl halides (CH3X; X is Br, Cl and I) and very short-lived halogenated substances (VSLSs; bromoform – CHBr3, dibromomethane – CH2Br2, bromodichloromethane – CHBrCl2, trichloroethylene – C2HCl3, chloroform – CHCl3 – and dibromochloromethane – CHBr2Cl) are well known for their significant influence on ozone concentrations and oxidation capacity of the troposphere and stratosphere and for their key role in aerosol formation. Insufficient characterization of the sources and the emission rate of VHOCs limits our ability to understand and assess their impact in both the troposphere and stratosphere. Over the last two decades, several natural terrestrial sources for VHOCs, including soil and vegetation, have been identified, but our knowledge of emission rates from these sources and their responses to changes in ambient conditions remains limited. Here we report measurements of the mixing ratios and fluxes of several chlorinated and brominated VHOCs from different landscapes and natural and agricultural vegetated sites at the Dead Sea during different seasons. Fluxes were generally positive (emission into the atmosphere), corresponding to elevated mixing ratios, but were highly variable. Fluxes (and mixing ratios) for the investigated VHOCs ranged as follows: CHBr3 from −79 to 187 nmol m−2 d−1 (1.9 to 22.6 pptv), CH2Br2 from −55 to 71 nmol m−2 d−1 (0.7 to 19 pptv), CHBr2Cl from −408 to 768 nmol m−2 d−1 (0.4 to 11 pptv), CHBrCl2 from −29 to 45 nmol m−2 d−1 (0.5 to 9.6 pptv), CHCl3 from −577 to 883 nmol m−2 d−1 (15 to 57 pptv), C2HCl3 from −74 to 884 nmol m−2 d−1 (0.4 to 11 pptv), methyl chloride (CH3Cl) from -5300 to 10,800 nmol m−2 d−1 (530 to 730 pptv), methyl bromide (CH3Br) from −111 to 118 nmol m−2 d−1 (7.5 to 14 pptv) and methyl iodide (CH3I) from −25 to 17 nmol m−2 d−1 (0.4 to 2.8 pptv). Taking into account statistical uncertainties, the coastal sites (particularly those where soil is mixed with salt deposits) were identified as sources of all VHOCs, but this was not statistically significant for CHCl3. Further away from the coastal area, the bare soil sites were sources for CHBrCl2, CHBr2Cl, CHCl3, and probably also for CH2Br2 and CH3I, and the agricultural sites were sources for CHBr3, CHBr2Cl and CHBrCl2. In contrast to previous reports, we also observed emissions of brominated trihalomethanes, with net molar fluxes ordered as follows: CHBr2Cl > CHCl3 > CHBr3 > CHBrCl2 and lowest positive flux incidence for CHCl3 among all trihalomethanes; this finding can be explained by the soil's enrichment with Br. Correlation analysis, in agreement with recent studies, indicated common controls for the emission of CHBr2Cl and CHBrCl2 and likely also for CHBr3. There were no indications for correlation of the brominated trihalomethanes with CHCl3. Also in line with previous reports, we observed elevated emissions of CHCl3 and C2HCl3 from mixtures of soil and different salt-deposited structures; the flux correlations between these compounds and methyl halides (particularly CH3I) suggested that at least CH3I is also emitted via similar mechanisms or is subjected to similar controls. Overall, our results indicate elevated emission of VHOCs from bare soil under semiarid conditions. Along with other recent studies, our findings point to the strong emission potential of a suite of VHOCs from saline soils and salt lakes and call for additional studies of emission rates and mechanisms of VHOCs from saline soils and salt lakes.
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GSCHWEND, P. M., J. K. MACFARLANE, and K. A. NEWMAN. "Volatile Halogenated Organic Compounds Released to Seawater from Temperate Marine Macroalgae." Science 227, no. 4690 (March 1, 1985): 1033–35. http://dx.doi.org/10.1126/science.227.4690.1033.

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Reddy, Christopher M., Li Xu, Timothy I. Eglinton, Jan P. Boon, and D. John Faulkner. "Radiocarbon content of synthetic and natural semi-volatile halogenated organic compounds." Environmental Pollution 120, no. 2 (December 2002): 163–68. http://dx.doi.org/10.1016/s0269-7491(02)00162-8.

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Dissertations / Theses on the topic "(halogenated) volatile organic compounds"

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Raimund, Stefan. "Sources and fluxes of volatile halogenated organic compounds in highly productive marine areas." Brest, 2010. http://www.theses.fr/2010BRES2022.

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Les Composés Halogénés Organiques Volatils (VHOC) sont des composès qui influencent largement la chimie atmosphérique et qui ont des sources naturelles et anthropiques. La production biogénique, les sources marines et les flux à l’interface air-mer de ces composés sont encore peu connues et ont fait l’objet de cette étude. Un système analytique et de nouveaux systèmes de prélèvement ont été développés. Lors d’un travail au laboratoire, il a été démontré que la communication plante-plante orchestre la formation des VHOC : une algue pré-traitée réagit moins intensément après réception d’un signal oligoguluronate. Ceci pourrait être bénéfique pour l’algue en termes d’efficacité de coûts. Les distributions et les flux air-mer de VHOC ont été étudiés dans deux systèmes marins très productifs : une région d’upwelling dominée par les dïatomées et une région côtière en régime mégatidal enrichie en nutriments et riche en macroalgues. Les principaux résultats ont montré que (1) les zones d’upwelling ne sont pas caractérisées par de fortes teneurs en VHOC, (2) dans les zones influencées par la marée, la marée a des effets significatifs sur la formation des composés iodés et bromés mais n’influence pas la formation des composés chlorés (à l’exception du chloroforme qui montre une légère dépendance dans l’upwelhng ibérique) (3) les composés bromés ont des sources côtières importantes et localisées (4) les composés iodés ont des sources qui ne sont pas strictement liées aux macroalgues (5) que les principales sources de composés chlorés auraient une origine anthropique et (6) la formation des halocarbonés et leurs flux vers l’atmosphère montrent des variations saisonnières marquées
Volatile halogenated organic compounds (VHOCs) constitute a large group of environmental gases that can influence atmospheric chemistry, and have natural and anthropogenlc sources, Marine sources and fluxes, and biogenic production are poorly investigated. During this thesis we designed an analytical system and sampling devices for measurements of halocarbons which showed high performance, both at sea and during laboratory analyses. In a laboratory experiment it could be demonstrated that plant-plant communication orchestrates the formation of VHOCs: “forewarned” algae react less intensely after perception of an oligoguluronates signal. This might be beneficial for the algae in terms of cost efficiency. Two highly productive marine areas were studied for VHOC distribution and air-sea fluxes: a diatom dominated upwelling region and a nutrient enriched coastal region with an important macroalgae cover and a mega-tidal regime. The main findings are (1) upwelling regions are not characterized by high internal VHOC formallon, (2) in tidal-lnfiuenced marine areas tides have significant effects on the formation of iodo- and bromocarbons but no influence on the formation of chlorocarbons (with the exception of chloroform, which showed minor dependence on tides in the Iberian upwelling), (3) bromocarbons have strong and highly localized coastal sources (4) iodocarbons have sources that are not strictly related to macroalgae, (5) main sources of chlorocarbons might have an anthropogenic origin and (6) formation of halocarbons and their fluxes to the atmosphere show a marked seasonality
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Wevill, David John. "Atmospheric and marine measurements of volatile halogenated organic compounds in coastal and open ocean environments." Thesis, University of York, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425413.

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Palmer, Carl James. "A study of the distribution and origin of volatile halogenated organic compounds in troposphere and oceans." Thesis, University of York, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432223.

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Smith, Madelyn M. "Cometabolic Degradation of Halogenated Aliphatic Hydrocarbons by Aerobic Microorganisms Naturally Associated with Wetland Plant Roots." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1341854406.

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Lecharlier, Aurore. "Caractérisation des composés trace dans le biogaz et biométhane : développement d'une méthode d'échantillonnage, de préconcentration in situ et d'analyse." Electronic Thesis or Diss., Pau, 2022. http://www.theses.fr/2022PAUU3008.

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Afin d’accroître les connaissances sur les composés traces présents dans les biogaz et biométhane et de garantir l’intégration durable de ces gaz dans le mix énergétique européen, une chaîne analytique complète a été développée dont un élément central est un dispositif d’échantillonnage de terrain permettant la préconcentration directe in situ des composés traces en prélevant ces gaz à leur pression actuelle (≤ 200 bara). Les composés traces ciblés dans ce travail incluent : alcanes (linéaires, cycliques, polycycliques), aromatiques, terpènes, alcènes, espèces organiques halogénées, espèces organiques oxygénées (alcools, aldéhydes, esters, éthers, cétones), siloxanes, composés soufrés organiques et inorganiques.L’état de l’art des techniques de prélèvement de gaz et de préconcentration pour la détermination de composés traces dans des matrices gazeuses a premièrement été réalisé. Sur base de cette étude, il fut choisi d’effectuer la préconcentration sur des tubes d’adsorbants multi-lits (TAM) assemblés manuellement. Le système de préconcentration fut élaboré et optimisé au laboratoire en sélectionnant des adsorbants commerciaux; les procédures d’assemblage et de conditionnement des nouveaux TAM furent établies; l’efficacité de quatre configurations de TAM à adsorber et libérer des composés traces ciblés fut testée en utilisant des mélanges de gaz synthétiques certifiés contenant des composés à l’état de traces (1 ppmmol) dans une matrice N2 ou CH4. Les analytes préconcentrés sur les TAM sont récupérés par désorption thermique (DT) des tubes au moyen d’un nouveau prototype de DT pour être analysés par chromatographie en phase gazeuse (CG) couplée à la spectrométrie de masse (SM).Deuxièmement, la méthode analytique et le prototype de DT ont été validés. Il fut démontré que le pouvoir résolutif du prototype de DT était plus élevé que celui obtenu par d’autres techniques de préconcentration ou d’autres méthodes d’injection en CG, telles que la microextraction en phase solide ou l’injection directe de gaz. Par ailleurs, les paramètres de CG-SM furent optimisés pour détecter le large spectre de composés traces potentiellement présents dans le biogaz et biométhane.Troisièmement, un prototype haute-pression innovant fut évalué, permettant le prélèvement de gaz pressurisés (≤ 200 bara) à travers les TAM pour la préconcentration directe et sous haute-pression des composés traces présents dans ces gaz. Ce prototype fut validé au laboratoire au moyen de mélanges de gaz synthétiques pressurisés avant d’être utilisé sur le terrain pour prélever du biométhane à 40 bara au niveau d’un poste d’injection dans le réseau de gaz naturel.Ensuite, la chaîne d’échantillonnage fut assemblée pour mener 6 campagnes de prélèvement durant lesquelles 6 flux différents de biogaz et biométhane furent prélevés sur une installation de stockage de déchets non dangereux et deux sites de méthanisation valorisant divers intrants. Les composés traces de ces gaz furent qualitativement déterminés via la méthode de DT-CG-SM élaborée. En un unique prélèvement et utilisant des volumes de gaz réduits (0.5 – 2 LN), un large spectre de composés traces issus de diverses familles chimiques (alcools, aldéhydes, alcènes, aromatiques, alcanes, esters, éthers, halogénés, cétones, soufrés, siloxanes et terpènes) furent identifiés. Des variations de composition en composés traces furent observées dans les différents gaz et les corrélations potentielles entre intrants, procédés de traitement des gaz et composés traces identifiés, furent discutées. La génération du mono-terpène p-cymène et d’autres terpènes dans les méthaniseurs digérant surtout des résidus alimentaires, a notamment été mise en évidence. La procédure de préconcentration haute-pression in situ développée dans ce travail peut certainement contribuer à faciliter les opérations de prélèvements de gaz sur le terrain pour déterminer les composés traces dans des matrices gazeuses telles que le biogaz et le biométhane
In pursuance of enhancing knowledge on biogas and biomethane’s trace compounds to help guarantee their sustainable integration in today’s European energy mix, a field sampling set-up enabling direct in situ preconcentration of non-metallic trace compounds in such gas samples at their pipe working pressure (up to 200 bara) was developed. Non-metallic trace compounds targeted in this work included alkanes (linear, cyclic, polycyclic), aromatics, terpenes, alkenes, halogenated organic species, oxygenated organic species (alcohols, aldehydes, esters, furans and ethers, ketones), siloxanes, organic and inorganic Sulphur-compounds. Firstly, state-of-the-art gas sampling and preconcentration techniques for the determination of trace compounds in gaseous matrices were reviewed. Based on this review, preconcentration was chosen to be performed on self-assembled multibed adsorbent tubes (MAT). The preconcentration system was elaborated and optimized in the laboratory: convenient commercial adsorbents were selected; procedures for the assembly and conditioning of new MAT were established; four MAT configurations were tested on their efficiency in adsorbing and releasing targeted trace compounds using certified synthetic gas mixtures containing targeted species at trace concentrations (1 ppmmol) in CH4 or N2 matrices. Analytes preconcentrated on MAT were recovered for analysis by thermal desorption (TD) of the tubes using a new TD prototype followed by gas chromatography (GC) hyphenated with mass spectrometry (MS) (TD-GC-MS). Secondly, the analytical method, and in particular the new TD prototype, was validated. The chromatographic resolution power of the new TD prototype was proved to be higher than that obtained from other well established preconcentration or GC-injection methods such as solid phase microextraction or direct headspace gas injection. Besides, GC-MS parameters were optimized to detect the broad range of trace compounds potentially found in biogas and biomethane.Thirdly, the use of a novel high-pressure tube sampling (HPTS) prototype was evaluated for the circulation of pressurized gases (up to 200 bara) through MAT for the direct high-pressure preconcentration of trace compounds from such gases. The HPTS was first validated in the laboratory using pressurized certified synthetic gas mixtures, and then used on field to sample compressed biomethane at a natural gas grid injection station at 40 bara.Subsequently, the field sampling chain was set-up and 6 field sampling campaigns were conducted where 6 different streams of landfill gas, biogas and biomethane were collected at a landfill plant and two anaerobic digestion plants treating diverse feedstocks. Trace compounds were qualitatively determined in all gas samples via the developed TD-GC-MS method. In a single sampling run and using limited gas volumes ranging 0.5 – 2 LN, a wide range of trace compounds in a variety of chemical families (alcohols, aldehydes, alkenes, aromatics, alkanes (linear, cyclic and polycyclic), esters, furans and ethers, halogenated species, ketones, Sulphur-compounds, siloxanes and terpenes) were identified. Variations in trace compounds composition were observed in the different gases sampled and potential correlations between feedstocks nature, implemented gas treatment processes and trace compounds determined were discussed. In particular, the substantial generation of the mono-terpene p-cymene and of other terpenes was evidenced for anaerobic digestion plants treating principally food-wastes. It is believed the shortened and high-pressure-proof field preconcentration procedure developed in this work can contribute facilitating field sampling operations for the determination of trace compounds in complex gas matrices such as biogas and biomethane
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Greenacre, Caroline M. "Tropospheric chemistry of halogenated organic compounds." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404120.

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Kinnison, David J. A. "Tropospheric chemistry of halogenated organic compounds." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240663.

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Allpress, James David. "Microbial transformation of halogenated organic compounds." Thesis, Manchester Metropolitan University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309883.

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Ojala, S. (Satu). "Catalytic oxidation of volatile organic compounds and malodorous organic compounds." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514278704.

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Abstract This thesis describes efforts made on the development of an existing catalytic incinerator. The development work, called process characterization, consists of four general parts. These are the development of measurement methodology, the studying of construction materials, the selection of suitable catalysts and the testing of the effects of process operation conditions. The two application areas for catalytic incineration considered in this thesis are solvent emission abatement (VOC, volatile organic compounds) and chip bin emission abatement (SVOC, sulphur-containing volatile organic compounds). As a baseline, the process characterization is started with the development of measurement methodology. In general, the methodology will decrease costs and simplify the carrying out of the actual measurements and thereby make the measurement time more effective. In the methodology it is proposed that continuous total concentration measurement should be used in connection with qualitative sampling to obtain reliable measurement data. The selection of suitable construction materials for the application is very important. As shown in this thesis, the end conversions in solvent emission abatement may even be improved through the selection of the proper construction materials. In chip bin emission abatement, the problem arises from corrosive oxidation products that set limits on the construction materials used as well as on oxidation conditions. Catalyst selection is based on the following catalytic properties: activity, selectivity and durability. These catalytic properties are studied either at the laboratory or on an industrial scale. The catalytic materials tested are Pt, Pd, Pt-Pd, Cu-Mn oxides, MnO2-MgO, CuxMg(1-x)Cr2O4 and CuxCr2O4. The most important selection criteria in solvent emission abatement are proposed to be activity and selectivity. In the case of chip bin-SVOC-abatement, these are selectivity and durability. Based on these criteria, catalysts containing Cu-Mn oxides and Pt were demonstrated to be the best catalysts in VOC oxidation, and catalyst containing MnO2-MgO was shown to be best catalyst in SVOC oxidation. A study on the effect of process operation parameters (temperature, concentration and gas hourly space velocity (GHSV)) and moisture was carried out with the aid of factorial design. In VOC (n-butyl acetate) oxidation, the most influential process parameter was GHSV, which decreased the end conversion when it was increased. In SVOC (DMDS) oxidation, the effect of temperature was most significant. The end conversions increased as the temperature increased. Moisture slightly decreased the formation of by-products in n-butyl acetate oxidation. In DMDS oxidation, moisture slightly increased the end conversions at a lower temperature level (300°C). At the end of the thesis, these process parameters are also discussed from the standpoint of the catalysts' activity, selectivity and durability. Finally, proposals for process improvements are suggested.
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Ntainjua, Ndifor Edwin. "Catalytic oxidation of volatile organic compounds." Thesis, Cardiff University, 2007. http://orca.cf.ac.uk/54585/.

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Polycyclic aromatic hydrocarbons (PAHs) are an important class of volatile organic compounds (VOCs) which pose enormous health and environmental threats. This thesis investigates different catalyst formulations for the complete oxidation of naphthalene (Np). a model PAH. Low loadings of vanadium added during the impregnation step of catalyst preparation were found to enhance the naphthalene oxidation activity of Pd-alumina and Pt- alumina catalysts while higher loadings were detrimental to the catalysts' performance. The promotional effect has been attributed to the presence of a low concentration of a particular type of vanadium species which fosters the redox behaviour of the binary system (Pd/V or Pt/V) coupled with the change in the active metal (Pd or Pt) particle size (Pd or Pt dispersion). The presence of high concentrations of crystalline V2O5 species has been suggested to account for the lower activity observed for Pd/V and Pt/V catalysts with vanadium loadings in the range of 6 - 12% and 1 - 12 % respectively. It is postulated that the mechanism of naphthalene oxidation over Pd/V differs from the mechanism of oxidation over Pt/V catalysts. The nature of support material was established to be crucial for the activity of Pt- supported catalysts for naphthalene oxidation. The Pt dispersion, metal-support interaction (MSI) and oxidation state of Pt varied as a function of the nature of support and hence resulted in differences in the Np oxidation efficiency of five Pt- supported catalysts with equal Pt loading but different supports. Low Pt dispersion (high Pt particle size), weak MSI and metallic state of Pt favoured Np oxidation. Si02 proved to be the best amongst five Pt supports investigated for Np oxidation. A variation in the preparation method and preparation conditions of ceria affected the surface area, crystallite size, oxygen defect concentration, morphology and surface reducibility of the ceria catalyst and hence the Np oxidation activity. High surface area, small crystallite size, and high oxygen defect concentration of Ce02 favoured the activity of the catalyst for Np oxidation. The best preparation methods in this study were found to be homogeneous precipitation with urea (UR) and precipitation with the carbonate (CR). Optimum preparation conditions for ceria (UR) were established and a highly active nano-crystalline ceria catalyst for Np oxidation was derived. The addition of low and high loadings of Pt during the precipitation of this ceria (UR) catalyst resulted in less active naphthalene oxidation catalysts. The drop in activity of ceria with Pt doping has been attributed to a strong metal support interaction between Pt and ceria which limits the ease at which lattice oxygen is consumed in the Mars-Van krevelen redox cycle.
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Books on the topic "(halogenated) volatile organic compounds"

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chairman, Bennett Andrew F., and Field Barry chairman, eds. Volatile organic compounds. London: HMSO, 1995.

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F, Bennett Andrew, and Field Barry, eds. Volatile organic compounds. London: HMSO, 1995.

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Volatile organic compounds. Hauppauge, N.Y: Nova Science Publishers, 2011.

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United States. Environmental Protection Agency. Office of Drinking Water., ed. Volatile organic compounds. Chelsea, Mich: Lewis Publishers, 1991.

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Biochemistry of halogenated organic compounds. New York: Plenum Press, 1991.

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Kirk, Kenneth L. Biochemistry of Halogenated Organic Compounds. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4757-4605-1.

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Wang, W., JL Schnoor, and J. Doi, eds. Volatile Organic Compounds in the Environment. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1996. http://dx.doi.org/10.1520/stp1261-eb.

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Harrison, R. M., and R. E. Hester, eds. Volatile Organic Compounds in the Atmosphere. Cambridge: Royal Society of Chemistry, 1995. http://dx.doi.org/10.1039/9781847552310.

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Koppmann, Ralf, ed. Volatile Organic Compounds in the Atmosphere. Oxford, UK: Blackwell Publishing Ltd, 2007. http://dx.doi.org/10.1002/9780470988657.

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Ralf, Koppmann, ed. Volatile organic compounds in the atmosphere. Oxford: Blackwell Pub., 2007.

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Book chapters on the topic "(halogenated) volatile organic compounds"

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O'Doherty, Simon J., and Lucy J. Carpenter. "Halogenated Volatile Organic Compounds." In Volatile Organic Compounds in the Atmosphere, 173–220. Oxford, UK: Blackwell Publishing Ltd, 2007. http://dx.doi.org/10.1002/9780470988657.ch5.

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Uragami, Tadashi. "Volatile Organic Compounds." In Encyclopedia of Membranes, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-40872-4_596-1.

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Sarkar, Tapan, and Ashok Mulchandani. "Volatile Organic Compounds." In Environmental Analysis by Electrochemical Sensors and Biosensors, 1023–46. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1301-5_14.

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Patnaik, Pradyot. "Volatile Organic Compounds." In Handbook of Environmental Analysis, 361–72. Third edition. | Boca Raton : Taylor & Francis, CRC Press, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315151946-63.

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Hess-Kosa, Kathleen. "Volatile Organic Compounds." In Indoor Air Quality, 137–64. Third edition. | Boca Raton : CRC Press/Taylor & Francis, 2019.: CRC Press, 2018. http://dx.doi.org/10.1201/9781315098180-8.

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Kirk, Kenneth L. "Biochemistry of Halogenated Carbohydrates." In Biochemistry of Halogenated Organic Compounds, 193–252. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4757-4605-1_6.

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Jaecker-Voirol, A. "VOC: Volatile Organic Compounds." In Pollutants from Combustion, 241–61. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4249-6_12.

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Jianyin, Xiong, and Shaodan Huang. "Volatile Organic Compounds (VOCs)." In Handbook of Indoor Air Quality, 71–98. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7680-2_4.

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Koppmann, Ralf, and Jürgen Wildt. "Oxygenated Volatile Organic Compounds." In Volatile Organic Compounds in the Atmosphere, 129–72. Oxford, UK: Blackwell Publishing Ltd, 2007. http://dx.doi.org/10.1002/9780470988657.ch4.

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Pecoraro, Anthony R., and Troy A. Markel. "Fecal Volatile Organic Compounds." In Biomarkers in Disease: Methods, Discoveries and Applications, 359–69. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07389-2_22.

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Conference papers on the topic "(halogenated) volatile organic compounds"

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Sadiek, Ibrahim, Adrian Hjältén, Michael Stuhr, Chuang Lu, Francisco Senna Vieira, and Aleksandra Foltynowicz. "Mid-Infrared Comb-Based Fourier Transform Spectroscopy of Halogenated Volatile Organic Compounds." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/cleo_si.2020.sm1m.8.

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Hjalten, Adrian, Ibrahim Sadiek, Chuang Lu, Francisco Senna Vieira, Michael Stuhr, Matthias Germann, and Aleksandra Foltynowicz. "High-Resolution Measurements of Halogenated Volatile Organic Compounds Using Frequency Comb Fourier Transform Spectroscopy." In 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2021. http://dx.doi.org/10.1109/cleo/europe-eqec52157.2021.9541981.

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Li, Jianrong, Stefan Persijn, Iris de Krom, Heleen Meuzelaar, and Adriaan M. H. van der Veen. "Metrology for biomethane conformity assessment: measure trace gas impurities in biomethane." In 19th International Congress of Metrology (CIM2019), edited by Sandrine Gazal. Les Ulis, France: EDP Sciences, 2019. http://dx.doi.org/10.1051/metrology/201906002.

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Abstract:
To facilitate the use of biomethane in existing transmission and distribution infrastructures, CEN/TC 408 developed specifications (EN 16723) for injecting biomethane into the natural gas grids and using it as a transport fuel. Currently, the test methods cited in EN 16723 lack metrological aspects and have not been specifically developed for biomethane. To address this need, ISO/TC193/SC1/WG25 “Biomethane” has been created to work on standardized methods. To assess conformity of biomethane with the specification and to provide essential input to WG25, test methods are being developed in this research for a group of impurities such as siloxanes, halogenated volatile organic compounds, hydrogen chloride, hydrogen fluoride. A further objective of this research is to develop fit-for-purpose measurement standards for these parameters, to enable SI-traceable calibration and facilitate accurate measurement results. An overview of the progress made with respect to the development of measurement standards and test methods for trace level concentrations of impurities is presented, with a focus on static measurement standards of siloxanes and halogenated volatile organic compounds, dynamic gas standards of HCl and HF, as well as corresponding test methods based on gas chromatography and spectroscopic techniques. The work presented is pivotal for the development of metrological infrastructure for biomethane conformity assessment.
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Syed, Yasir I., Chris Phillips, Davide Deganello, and Keir E. Lewis. "Exhaled Volatile Organic Compounds In COPD Exhaled Volatile Organic Compounds & COPD." In American Thoracic Society 2011 International Conference, May 13-18, 2011 • Denver Colorado. American Thoracic Society, 2011. http://dx.doi.org/10.1164/ajrccm-conference.2011.183.1_meetingabstracts.a4598.

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Yost, C., B. Pacolay, and L. Coyne. "348. Monitoring Volatile Organic Compounds Samplers." In AIHce 2002. AIHA, 2002. http://dx.doi.org/10.3320/1.2766288.

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Wolff, Marcus, Henry Bruhns, and Wenyi Zhang. "Photoacoustic detection of volatile organic compounds." In SPIE Optics + Optoelectronics, edited by Francesco Baldini, Jiri Homola, Robert A. Lieberman, and Kyriacos Kalli. SPIE, 2011. http://dx.doi.org/10.1117/12.888966.

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Henley, Michael V., William R. Bradley, Sheryl E. Wyatt, G. M. Graziano, and J. R. Wells. "Atmospheric transformation of volatile organic compounds." In AeroSense 2000, edited by Patrick J. Gardner. SPIE, 2000. http://dx.doi.org/10.1117/12.394076.

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Amano, Ryo S., Jose Martinez Lucci, Krishna S. Guntur, M. Mahmun Hossain, M. Monzur Morshed, Matthew E. Dudley, and Franklin Laib. "Experimental Study of Treating Volatile Organic Compounds." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34579.

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Heated Soil Vapor Extraction (HSVE) is a technology that has been used successfully to clean up subsurface soils at sites containing chlorinated solvents and petroleum hydrocarbons. The costs have been extremely high due to the large amount of energy required to volatilize high molecular weight polycyclic aromatic hydrocarbon (PAH) compounds present in the soil matrix. One remediation contractor states that hydrocarbons are oxidized in situ by achieving temperatures in the >1000 F range near the heaters [1]. A critical question is whether the volatile portion of manufactured gas plant (MGP) hydrocarbons (VOCs) can be stripped out at lower temperatures such that the remaining contaminants will be unavailable for transport or subsequent dissolution into the groundwater. Soil remediation by heated soil vapor extraction system is a relatively new technology developed by Jay Jatkar Inc. (JJI) along with the University of Wisconsin-Milwaukee [2]. The areas around chemical companies or waste disposal sites have been seriously contaminated from the chemicals and other polluting materials that are disposed off. The process developed by JJI, consists of a heater/boiler that pump and circulates hot oil through a pipeline that is enclosed in a larger-diameter pipe. This extraction pipe is vertically installed within the contaminated soil up to a certain depth and is welded at the bottom and capped at the top. The number of heat source pipes and the extraction wells depends on the type of soil, the type of pollutants, moisture content of the soil and the size of the area to be cleaned. The heat source heats the soil, which is transported in the interior part of the soil by means of conduction and convection. This heating of soil results in vaporization of the gases, which are then driven out of the soil by the extraction well. The extraction well consists of the blower which would suck the vaporized gases out of the system. Our previous studies had removed higher boiling compounds, such as naphthalene, etc., to a non-detectable level. Thus, the current technology is very promising for removing most of the chemical compounds; and can also remove these boiling compounds from the saturated zone. Gas chromatography (GC) is utilized in monitoring the relative concentration changes over the extraction period. Gas chromatography-mass spectrometry (GC-MS) assists in the identification and separation of extracted components. The experimental research is currently being conducted at the University of Wisconsin-Milwaukee. The objectives of this study are to identify contaminants and time required to remove them through HSVE treatment and provide data for computation fluid dynamics CFD analysis.
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Amano, R. S. "Removal of volatile organic compounds from soil." In WATER POLLUTION 2010. Southampton, UK: WIT Press, 2010. http://dx.doi.org/10.2495/wp100101.

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Dirri, Fabrizio, Ernesto Palomba, Andrea Longobardo, David Biondi, Angelo Boccaccini, Bortolino Saggin, Diego Scaccabarozzi, and Emiliano Zampetti. "QCM-based sensor for volatile organic compounds characterization." In 2017 IEEE International Workshop on Metrology for AeroSpace (MetroAeroSpace). IEEE, 2017. http://dx.doi.org/10.1109/metroaerospace.2017.7999547.

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Reports on the topic "(halogenated) volatile organic compounds"

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John F. Schabron, Jr Joseph F. Rovani, and Theresa M. Bomstad. FIELD SCREENING FOR HALOGENATED VOLATILE ORGANIC COMPOUNDS. Office of Scientific and Technical Information (OSTI), July 2003. http://dx.doi.org/10.2172/820761.

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John F. Schabron, Joseph F. Rovani Jr., and Theresa M. Bomstad. FIELD SCREENING FOR HALOGENATED VOLATILE ORGANIC COMPOUNDS. Office of Scientific and Technical Information (OSTI), June 2002. http://dx.doi.org/10.2172/822157.

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John F. Schabron, Susan S. Sorini, and Joseph F. Rovani Jr. FIELD SCREENING FOR HALOGENATED VOLATILE ORGANIC COMPOUNDS: THE NEW X-WAND HVOC SCREENING DEVICE. Office of Scientific and Technical Information (OSTI), March 2006. http://dx.doi.org/10.2172/887237.

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Lunsford, J. H. The Adsorption and Reactions of Halogenated Volatile Organic Compounds (VOCs) on Metal Oxides - Final Report. Office of Scientific and Technical Information (OSTI), November 2000. http://dx.doi.org/10.2172/775042.

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Lunsford, J., D. W. Goodman, and J. F. Haw. The adsorption and reaction of halogenated volatile organic compounds (VOC's) on metal oxides. 1998 annual progress report. Office of Scientific and Technical Information (OSTI), June 1998. http://dx.doi.org/10.2172/13641.

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Lunsford, J. H., J. F. Haw, and D. W. Goodman. The adsorption and reaction of halogenated volatile organic compounds (VOC's) on metal oxides. Annual progress report, September 1996--October 1997. Office of Scientific and Technical Information (OSTI), October 1997. http://dx.doi.org/10.2172/13640.

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Gu, B., and R. L. Siegrist. Alkaline dechlorination of chlorinated volatile organic compounds. Office of Scientific and Technical Information (OSTI), June 1996. http://dx.doi.org/10.2172/419269.

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Maddalena, Randy, Na Li, Alfred Hodgson, Francis Offermann, and Brett Singer. Maximizing Information from Residential Measurements of Volatile Organic Compounds. Office of Scientific and Technical Information (OSTI), February 2013. http://dx.doi.org/10.2172/1221051.

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Davis, J. K. Volatile Organic Compounds in Non-Arid Soils Integrated Demonstration. Office of Scientific and Technical Information (OSTI), October 2001. http://dx.doi.org/10.2172/799748.

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Li, DeQuan. Cyclodextrin-based chemical microsensors for Volatile Organic Compounds (VOCs). Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/562505.

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