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Dissertations / Theses on the topic 'Organici Volatili'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Epoupa, Mengou Joseph <1973&gt. "Decomposizione catalitica di inquinanti organici volatili clorurati." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/712/1/Tesi_Epoupa_Mengou_Joseph.pdf.

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Epoupa, Mengou Joseph <1973&gt. "Decomposizione catalitica di inquinanti organici volatili clorurati." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/712/.

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3

Marzo, Aldo. "L’abbattimento delle emissioni di composti organici volatili in un colorificio." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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L’oggetto del presente lavoro di tesi è stato la riduzione della concentrazione di composti organici volatili (COV) nelle correnti gassose emesse ai camini di uno stabilimento per la produzione di vernici, al fine di portarne il valore al di sotto del limite ammesso dalle norme di legge. La classe dei composti organici volatili comprende numerosi composti chimici con proprietà fisiche e chimiche differenti, ma accomunati da un'elevata volatilità. I COV possono provenire da fonti naturali o da processi umani. Si è stimato che le fonti antropogeniche emettano complessivamente a livello mondiale

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4

BARRESI, Antonello. "Ossidazione catalitica di composti organici volatili presenti nelle emissioni gassose." Doctoral thesis, Politecnico di Torino, 1990. http://hdl.handle.net/11583/2501934.

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5

BRIGUGLIO, SARA CARMELA. "Composti Organici Volatili come marcatori di inquinamento e alterazione del metabolismo." Doctoral thesis, Università degli Studi di Trieste, 2017. http://hdl.handle.net/11368/2908132.

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L’argomento principale del presente elaborato di tesi è la caratterizzazione chimica di Composti Organici Volatili (COV) per a) valutare la qualità dell’aria in aree industriali fortemente impattate sia da inquinanti gassosi (benzene, toluene, ecc..) che da molestie olfattive, e b) valutare l’influenza di COV esogeni sulla salute umana ed in particolare sull’esacerbazione di determinate patologie. Durante l’attività sperimentale sono state testate differenti tecniche di campionamento ed analisi per i COV, dal classico campionamento con cartucce adsorbenti analizzate mediante tecnica gascromato

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6

Benitez, Macias Maria de los Àngeles <1973&gt. "Studio dei composti organici solforati volatili nell'ecosistema acquatico: laguna di Venezia." Doctoral thesis, Università Ca' Foscari Venezia, 2009. http://hdl.handle.net/10579/645.

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7

Ceccardi, Francesca. "Determinazione gascromatografica di composti organici volatili (VOCs) in materiali per packaging sostenibile." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Negli ultimi anni si osserva una richiesta sempre maggiore da parte del mercato di materiali più sostenibili dal punto di vista ambientale. Le aziende hanno quindi iniziato a studiare soluzioni alternative, tra queste l’impiego di materiali riciclati e biodegradabili. Nell’ambito degli imballaggi a contatto con alimenti risulta importante utilizzare materiali che non rilascino composti nel prodotto contenuto ed è quindi necessario poter controllare la presenza di sostanze volatili (VOCs) e semivolatili (SVOCs) legate alla materia prima e al processo produttivo. Per questo motivo, si è messo a

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8

Prandi, Francesco. "Determinazione gascromatografica di composti organici volatili e semi-volatili (VOCs e SVOCs) in poliolefine ed effetti delle condizioni di lavorazione." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19215/.

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A relevant problem of polyolefins processing is the presence of volatile and semi-volatile compounds (VOCs and SVOCs) such as linear chains alkanes found out in final products. These VOCs can be detected by customers from the unpleasant smelt and can be an environmental issue, at the same time they can cause negative side effects during process. Since no previously standardized analytical techniques for polymeric matrix are available in bibliography, we have implemented different VOCs extraction methods and gaschromatographic analysis for quali-quantitative studies of such compounds. In lite

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9

Di, Talia Valentina. "Potenzialità dell’utilizzo delle piante per l’abbattimento di Composti Organici Volatili in ambienti indoor." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Questo lavoro nasce dalla lettura di un articolo scientifico del 1989 dove si illustra un concetto rivoluzionario per l’epoca: alcune piante ornamentali sono in grado di abbattere i composti organici volatili in ambienti chiusi. Lo scopo che ci si è proposti è stato quello di raccogliere tutti gli elementi necessari per costruire uno strumento in grado di valutare l’effetto dell’introduzione di piante ornamentali in un definito ambiente. Si è quindi proposto un modello,un semplice bilancio di materia che assume il volume di aria come perfettamente miscelato, che permette di prevedere le variaz

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10

Iandoli, Mariaclara. "Applicazione di fiocchi di fibre di polistirene sindiotattico per la rimozione di composti organici volatili da matrici acquose." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23253/.

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L’obiettivo della ricerca sperimentale condotta è di valutare la possibile applicabilità di fiocchi di fibre di polistirene sindiotattico come materiale adsorbente da utilizzare nel processo di depurazione delle acque reflue. Il trattamento che potrebbe prevedere l’impiego dei fiocchi di fibre di polistirene sindiotattico è l’adsorbimento. Questo processo di separazione consiste nel trasferimento di uno o più componenti di una fase fluida sulla superficie di un solido poroso. Il mezzo adsorbente di comune impiego è il carbone attivo, per le elevate superfici specifiche e la buona affinità co

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11

Carrella, Cecilia <1987&gt. "Caratterizzazione di batteri aerobi eterotrofi aggiunti ad un impianto pilota di biofiltrazione per la degradazione di composti organici volatili (COV)." Master's Degree Thesis, Università Ca' Foscari Venezia, 2013. http://hdl.handle.net/10579/3489.

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Negli ultimi anni, l’aumentata sensibilità per le problematiche ambientali ha orientato l’attenzione verso la qualità dell’aria. Gli studi epidemiologici e la consapevolezza che le condizioni di salute della popolazione siano direttamente correlate alla concentrazione di inquinanti presenti in atmosfera, hanno fatto sì che venisse affrontata più concretamente la questione delle emissioni. In particolare le emissioni di solventi organici rappresentano un problema concreto a causa del loro ampio utilizzo in diversi settori industriali. All’interno di un contesto normativo che tutela la qualità

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12

Marino, Luis Fernando Bruno <1967&gt. "Emissione di sostanze organiche volatili (SOV) provenienti dalla cottura di piastrelle ceramiche. Studio delle relazioni fra additivi organici, condizioni di cottura ed emissione di SOV." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/89/1/Tesi_Marino.pdf.

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13

Marino, Luis Fernando Bruno <1967&gt. "Emissione di sostanze organiche volatili (SOV) provenienti dalla cottura di piastrelle ceramiche. Studio delle relazioni fra additivi organici, condizioni di cottura ed emissione di SOV." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/89/.

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14

Cordiani, Helena. "Sviluppo di metodologie per l'analisi di composti organici prodotti dalla fermentazione di frazioni pirolitiche della biomassa." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6762/.

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I processi microbiologici rivestono una grande importanza nello sviluppo di combustibili e sostanze chimiche da fonti rinnovabili (biomassa), quali: il biometano e le bioplastiche, come i poli(idrossialcanoati), PHA. I PHA sono poliesteri ottenuti per condensazione di 3-idrossiacidi, il più comune dei quali è il poli(3-idrossibutirrato, PHB). Gli alti costi di produzione del PHA da colture microbiche singole ha portato a valutare nuove strategie, tra cui l’utilizzo di colture microbiche miste (MMC) e substrati di scarto. Il bio-olio ottenuto dalla pirolisi di biomassa potrebbe essere un substr

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15

Lanfranchi, Alice <1996&gt. "Fermentazione di rifiuti organici in miscela con fanghi di depurazione per la produzione di acidi grassi volatili e valutazione delle rese dopo pretrattamento di cavitazione Co-fermentation of organic waste and sewage sludge for volatile fatty acids production and evaluation of the yields after cavitation pretreatment." Master's Degree Thesis, Università Ca' Foscari Venezia, 2021. http://hdl.handle.net/10579/19205.

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I rifiuti organici e i fanghi di depurazione rappresentano i due maggiori flussi di scarto del metabolismo urbano. L’obiettivo di questo lavoro di tesi consiste nella loro valorizzazione attraverso l’ottimizzazione della produzione di acidi grassi volatili (AGV) mediante fermentazione e successivamente attraverso la produzione di biogas mediante digestione anaerobica dell’effluente della fermentazione. Entrambi i processi di fermentazione e biometanazione sono stati condotti in condizioni mesofile, a T=37°C e T=42°C rispettivamente. I rifiuti organici e i fanghi di depurazione sono stati misce

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16

Lolli, Elisa. "il pet food: analisi della frazione aromatica e valutazione sensoriale." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21684/.

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Negli ultimi anni il settore del pet food ha registrato un forte incremento di interesse, spingendo le aziende produttrici ad indagare sulle variabili che incidono maggiormente sul gradimento, da parte degli animali domestici, degli alimenti a loro destinati. Si è riscontrato come, per cani e gatti, l’olfatto sia determinante per l’apprezzamento di un prodotto. Tale elaborato di tesi ha lo scopo di indagare alcuni prodotti destinati all’alimentazione degli animali, le crocchette per gatti, attraverso metodi analitici per la valutazione quali-quantitativa del profilo aromatico ed elementi di an

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17

PIFERI, CECILIA. "Cold plasmas for air purification and sanitation." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2023. https://hdl.handle.net/10281/402359.

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È comunemente accettato che il cambiamento climatico sia dovuto ad un effetto antropico. Gli agenti inquinati sono sicuramente responsabili del peggioramento della qualità della vita umana ed è necessario trovare una soluzione. Una importante classe di inquinati è quella dei Composti Organici Volatili (VOC). Molti di questi composti sono classificati come cancerogeni o possibili cancerogeni per le persone, oltre al fatto che possono causare danni a lungo termine sull'ambiente. Nonostante questi problemi, i VOC sono necessari nelle vernici di pareti o arredi, nei trattamenti dei tessuti e sono

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18

Hunter, James Freeman. "Oxidation of atmospheric organic carbon : interconnecting volatile organic compounds, intermediate-volatility organic compounds, and organic aerosol." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/97794.

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Thesis: Ph. D. in Environmental Chemistry, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 101-110).<br>.Organic molecules have many important roles in the atmosphere, acting as climate and biogeochemical forcers, and in some cases as toxic pollutants. The lifecycle of atmospheric organic carbon is extremely complex, with reaction in multiple phases (gas, particle, aqueous) and at multiple timescales. The details of the lifecycle chemistry (especially the amoun

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19

CASULA, SILVIA. "Non-volatile organic memory devices: from design to applications." Doctoral thesis, Università degli Studi di Cagliari, 2015. http://hdl.handle.net/11584/266601.

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The research activity described in the attached dissertation focused on the development, fabrication and characterization of new non-volatile memory elements based on organic technology. During the last few decades, organic materials based devices have attracted considerable interest due to their great potential for future electronic systems. Low fabrication costs, high mechanical flexibility and versatility of the chemical structure, good scalability and easy processing are the unique advantages of organic electronics. As memory devices are essential elements of any kind of electronic system,

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20

Cozzutto, Sergio. "Studi di metodi analitici e modellistici per la valutazione del rischio chimico ed impatti ambientali per impianti costieri di stoccaggio e pompaggio di idrocarburi." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4508.

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2008/2009<br>I consumi energetici europei si basano per oltre un terzo su prodotti petroliferi, di cui circa il 60% viene importato1. Trieste è tra i primi porti petroliferi italiani ed i petroli rappresentano oltre l’80 % dei circa 46 milioni di tonnellate di merci sbarcati annualmente. Le operazioni di sbarco, stoccaggio e pompaggio dei greggi nell’oleodotto transalpino TAL vengono effettuate nel rispetto delle normative nazionali e di standard internazionali di sicurezza, che hanno fatto sì che dal 1967 ad oggi, a fronte di una movimentazione di oltre un miliardo e 200 milioni di tonnellate

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21

Jiang, Zhaohui. "Atmospheric measurements of a series of volatiles organic compounds." Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2014.

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Les composes carbonyles et BTEX (benzène, toluène, éthylbenzène et xylène) sont deux groupes importants de composés organiques volatils (COV) présents dans l'atmosphère. Ils ont une contribution significative à la formation d'oxydants tels que l'ozone, PAN et d'autres photo-oxydants dans la troposphère. En outre, ils ont des effets néfastes sur la santé humaine. Dans ce travail, les concentrations atmosphériques de carbonyles et d’hydrocarbures aromatiques ont été mesurées et quantifiées en utilisant des techniques HPLC et GC-MS sur un site de mesure semi-urbain à Orléans (ICARE, France), de j

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22

Leglise, Joris. "Etude de la formation d'aérosols organiques secondaires par spectométrie de masse lors de l'ozonolyse de composés organiques volatils insatures." Thesis, Orléans, 2019. http://www.theses.fr/2019ORLE3013.

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La compréhension de la formation des aérosols organiques secondaires (AOS) reste lacunaire, notamment lors de l’ozonolyse de composés organiques volatils (COV) insaturés. La mesure de composés de faible volatilité participant à la génération des AOS est un défi auquel la communauté scientifique tente de répondre. Un des objectifs de ce travail de thèse était l’installation et l’emploi d’un système d’échantillonnage et de mesure de la composition chimique de l’aérosol par spectrométrie de masse à ionisation chimique (FIGAERO-CI-ToF-MS). Cet instrument a été utilisé dans le cadre de l’ozonolyse

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23

Zhang, Yujie. "Atmospheric measurements and degradation mechanisms of a number of volatile organic compounds." Thesis, Orléans, 2012. http://www.theses.fr/2012ORLE2048.

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Les composés organiques carbonylés et les BTEX (Benzène, Toluène, Éthylbenzène et Xylènes) représentent une classe importante de composés organiques volatils dans l’atmosphère. Ils sont émis par des sources anthropogénique et biogéniques. Leur dégradation atmosphérique conduit à la formation d’ozone, de phooxidants et d’aérosols organiques affectant ainsi la qualité de l’air aux échelles locales et régionales ainsi que la santé humaine. Il est donc important de mesurer leurs concentrations et évaluer leur devenir atmosphérique. Dans la présente thèse, nous avons conduit une étude systématique

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24

Amin, Hardik Surendra. "SPECIATION STUDIES FOR BIOGENIC VOLATILE ORGANIC COMPOUNDS AND SECONDARY ORGANIC AEROSOL GENERATED BY OZONOLYSIS OF VOLATILE ORGANIC COMPOUND MIXTURES." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/dissertations/528.

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Aerosols are either emitted directly into the atmosphere or are generated in the atmosphere; the latter process forms secondary organic aerosol (SOA). One of the important sources for SOA is the oxidation of volatile organic compounds (VOCs) by OH radicals, NOx, and O3. Aerosol can be visualized as suspended solid or liquid particle which is in equilibrium with surrounding gases. The products of SOA formation is a mixture of semi volatile organic compounds and a fraction of the products are condensable under atmospheric conditions. The condensable portion of aerosol is called particulate matte

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25

Hillaire, Anne. "Étude de la récupération de composés organiques volatils d'effluents gazeux par perméation de vapeur à travers des membranes denses." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL115N.

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La perméation de vapeur, procédé de séparation utilisant des membranes denses constitue une alternative attrayante pour épurer les effluents gazeux faiblement chargés en composés organiques volatiles (COV). Son principe repose sur l'extraction préférentielle de composés organiques, qui présentent une meilleure affinité pour le polymère, le transfert de matière étant rendu possible par une différence de pression imposée de part et d'autre de la membrane. Une cinquantaine d'unités industrielles sont déjà en fonction principalement pour traiter des hydrocarbures mais les connaissances théoriques

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26

Šetka, Milena. "Nano-polypyrrol pro detekci plynných analytů a tekavých organických látek." Doctoral thesis, Vysoké učení technické v Brně. CEITEC VUT, 2020. http://www.nusl.cz/ntk/nusl-417804.

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Polypyrol (PPy) je heterocyklický vodivý polymer s chemickou strukturou založenou na existenci systému konjugovaných elektronů mezi střídajícími se jednoduchými a dvojnými vazbami. Díky svým vynikajícím vlastnostem jako je dobrá elektrická vodivost, relativně vysoká stabilita prostředí a zároveň i jednoduchost a variabilita metod jeho přípravy, přilákal tento polymer pozornost mnoha vědců z různých vědních disciplín. Cílem výzkumu v této dizertační práci byla studie senzorického chování PPy. Za tímto účelem byla ověřena účinnost nanostruktur PPy při detekci vybraných „vysoce důležitých molekul

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27

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 concentra

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28

Browne, Gloria Joyce 1951. "Volatile organic emissions from carpet adhesives." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/291538.

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In this study volatile organic compounds (VOCs) emitted during carpet installations employing water-based adhesives were characterized. The potential impacts of 4 adhesives on indoor air quality were evaluated. Headspace sampling and analysis by gas chromatography/mass spectrometry were used to qualitate VOC emissions. Adhesives and carpet/adhesive composite samples were prepared for quantitative analysis of VOC emissions by gas chromatography with flame ionization detection. Volatiles were concentrated using a monitoring device and collected on charcoal adsorption tubes. Sampling intervals ra

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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

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Ndamyabera, Christophe Adrien. "Porous metal-organic frameworks for sorption of volatile organic compounds." Doctoral thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33877.

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Metal-organic frameworks (MOFs) present potential for various applications such as gas sorption, gas storage, sensing, drug delivery, and catalysis. This attracts researchers to design and synthesize MOFs that can respond to a specific application. In this thesis, mixed ligands 34pba and 44pba ligands (34pba = 3-(4-pyridyl)benzoate, and 44pba = 4-(4-pyridyl)benzoate) and Co2+ metal salts were used to synthesize porous MOFs {[Co(34pba)(44pba)]·DMF}n (1) and {[Co(34pba)(44pba)]·(C3H6O)}n (2), with DMF = N,N'-dimethylformamide and C3H6O = acetone through solvothermal reaction. These two relate to

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Ye, Penglin. "Semi-Volatile Organic Compounds: Behavior and Secondary Organic Aerosol Formation." Research Showcase @ CMU, 2015. http://repository.cmu.edu/dissertations/1046.

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This thesis mainly described the development of studying the behavior and secondary organic aerosol formation from semi-volatile organic compounds (SVOCs). SVOCs comprises a significant fraction of the organic mass in particulate matter (PM), which has shown important impacts on human health and also influences on Earth’s climate. SVOCs are thought to play essential roles in the formation of SOA, chemical aging and mixing processes. Smog chambers have been extensively used to study SOA formation, chemical reaction and physical properties. The interaction between SVOC vapor with Teflon chamber

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Granström, Karin. "Emissions of volatile organic compounds from wood." Doctoral thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap, fysik och matematik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2327.

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The central aim of this thesis is to support the efforts to counteract certain environmental problems caused by emissions of volatile organic compounds. The purpose of this work was (1) to develop a method to establish the amount of emitted substances from dryers, (2) to determine the effect of drying medium temperature and end moisture content of the processed material on emissions of monoterpenes and other hydrocarbons, (3) to examine the emissions of monoterpenes during production of pellets, and (4) to examine the natural emissions from forests with an eye to implications for modelling. Th

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Grira, Asma. "Atmospheric degradation of oxygenated Volatile Organic Compounds." Thesis, Rennes 1, 2021. http://www.theses.fr/2021REN1S017.

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Les composés organiques volatils oxygénés (COVO), principalement émis par des sources biogènes, jouent un rôle majeur dans la chimie de l'atmosphère, le changement climatique, l'environnement et la santé. Il a été récemment démontré que ces émissions augmentent en cas de stress biotique et/ou abiotique. Les COVO biogéniques peuvent subir une variété de réactions, tant chimiques que photolytiques, et ils sont impliqués dans la formation d'Aérosols Organiques Secondaires (AOS). Ces composés ont été détectés dans diverses régions, mais il y a très peu d’informations sur leurs processus de dégrada

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34

Planchais, Arnaud. "Etude des performances de matériaux hybrides MOFs pour le captage de COVs." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20228.

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Ce travail est une contribution à la compréhension des performances de matériaux hybrides poreux de type MOFs pour le captage de benzène, dans le cadre de la lutte contre les émissions de Composés Organiques Volatils (COVs) à partir de procédés basés sur l'adsorption d'effluents gazeux. Dans ce but, nous avons couplé diverses techniques expérimentales (spectroscopie d'impédance complexe, diffraction des rayons X, manométrie d'adsorption, …) à des simulations moléculaires (calculs basés sur la Théorie de la Fonctionnelle de la Densité, Monte Carlo ou Dynamique Moléculaire) pour étudier ces maté

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35

Mermet, Kenneth. "Caractérisation physico-chimique et réactivité d'espèces biogéniques sur un site de mesure en forêt des Landes : impacts sur la qualité de l'air." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0363.

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A l’échelle globale, les forêts sont parmi les écosystèmes les plus émetteurs de composés organiques volatils (COV). Une fois émis dans l’atmosphère, ces COV vont rapidement être oxydés en composés oxygénés. Selon leur volatilité et leur réactivité, ces produits d’oxydation pourront eux-mêmes être oxydés et rester soit en phase gazeuse et/ou être transférés dans la phase particulaire pour former des aérosols organiques secondaires (AOS). Cette thèse a eu pour objet principal de mieux caractériser les COV biogéniques (COVBs) en forêt des Landes, leurs concentrations et plus particulièrement leu

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Eltouny, Nermin. "Reduction of anthropogenic volatile and semi-volatile organic compounds by nanomaterials and photolysis." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86968.

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Anthropogenic volatile organic compounds (VOCs) and semi-volatile organic (SVOCs) compounds are atmospheric pollutants contributing to the photochemical formation of tropospheric ozone. We combined adsorption and UV photolysis techniques for the removal and degradation of selected VOCs and SVOCs. For adsorption, we synthesized magnetite nanoparticles, a naturally occurring material, to avoid unknown detrimental impacts associated with new materials, as was the case with chlorofluorcarbons. The removal efficiency with magnetite was up to 98 % for aromatics, and 30% for light alkanes. Magnetite

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Lamarche, Philippe. "Air stripping mass transfer correlations for volatile organics." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/4763.

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Barbet, Christelle. "Modélisation régionale de la composition chimique des aérosols prélevés au puy de Dôme (France)." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22473/document.

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Dans l’atmosphère, les particules d’aérosol jouent un rôle clef sur le climat et, par leur action sur la qualité de l’air, ont un impact néfaste sur la santé publique. Ces particules sont composées d’un mélange complexe d’espèces inorganiques et organiques formées à partir d’une grande variété de sources. Si les sources et mécanismes de production des espèces inorganiques sont désormais relativement bien connus, la caractérisation de la fraction organique des aérosols est beaucoup plus complexe : elle est constituée d’aérosols organiques primaires, émis directement dans l’atmosphère, et d’aéro

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Miguet, Marianne. "Adsorption de COV issus d'eaux souterraines et régénération des charbons actifs par voie solaire." Thesis, Perpignan, 2015. http://www.theses.fr/2015PERP0029/document.

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Ce manuscrit s’intéresse à une filière globale et durable de dépollution des eaux souterraines. Le polluant cible, le tétrachloroéthylène, est un composé organique volatil. La première étape de cette filière est la séparation du contaminant de l’eau. Elle a été réalisée par adsorption sur charbons actifs dans une colonne en lit fixe. Les résultats obtenus en laboratoire sur les capacités et les cinétiques d’adsorption ont permis de montrer l’efficacité de ce procédé. Un modèle issu de ces expériences a représenté correctement des conditions opératoires variées correspondant à celles utilisées

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Tsui, Kin-yin Jeanie. "Biogenic volatile organic compound emissions in Hong Kong." View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38029182.

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Hoteit, Joumana Abdel Moneim. "Commuters exposure to volatile organic compounds in London." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325581.

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Laothawornkitkul, Jullada. "Biogenic Volatile Organic Compounds : Roles and and Applications." Thesis, Lancaster University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531701.

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Tsui, Kin-yin Jeanie, and 徐健賢. "Biogenic volatile organic compound emissions in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38597664.

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Read, Katie Alana. "Volatile organic carbon (VOC) chemistry in remote atmospheres." Thesis, University of Leeds, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414172.

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Shin, Eun-Jae. "Catalytic hydrogen treatment of volatile organic compounds (VOCs)." Thesis, University of Leeds, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431873.

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Barr, David William. "The extraction of nickel using volatile organic agents." Thesis, University of Hertfordshire, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329068.

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Scanlon, Susan Marlene 1961, and Susan Marlene 1961 Scanlon. "Sunlight catalyzed ozone oxidation of volatile organic chemicals." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277284.

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Experiments evaluating the oxidation of 3 VOCs; tetrachloroethylene (PCE), trichloroethylene (TCE), and 1,2, dichloroethane (DCA); in the presence and absence of catalysts UV light and sunlight, at three nominally applied ozone concentrations; high (8.8 mg/l), medium (5.5 mg/l), and low (3.3 mg/l); have demonstrated that the degree of compound removal is dependent on the type of compound. PCE degradation was mainly photolytic, TCE destruction was more dependent on ozone dose, and DCE was the most refractory of the 3 compounds tested. Ozone dose and catalyst type and concentration were also sig

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Turner, Matthew A. "Boundaries in volatile organic compounds in human breath." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/20274.

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Exhaled breath is a rich and complex matrix containing many hundreds of compounds. Every breath offers the potential of a non-invasive measurement of the biochemical processes occurring in the human body and it is this notion that has led to the application of breath analysis for the detection of disease. With the majority of research in the field being focused on the detection of biomarkers, little has been presented on how the seemingly homeostatic matrix of breath varies during the course of normal life events. The research in this thesis describes how a subject's emotional state, physical

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Hunter, Paige Holt. "Control of Volatile Organic Compound (VOC) Air Pollutants." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/38614.

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A variety of methods exist to remove volatile organic compound (VOC) air pollutants from contaminated gas streams. As regulatory and public opinion pressures increase, companies are searching for more effective methods to control these emissions. This document is intended as a guide to help determine if existing systems are adequate and to provide additional information to improve the efficiency of the systems. It explores conventional methods of controlling VOC emissions, as well as innovative technologies including membrane separation, plasma destruction, and ozone catalytic ox

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Bergamaschi, Matteo. "Volatile Organic Compounds in cheese production chain (VOCheese)." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3426759.

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In recent years, consumers have become increasingly interested in the quality aspects of food. Food quality, in turn, is strongly related to the sensory characteristics such as the flavor. Several scientific studies have shown that the Volatile Organic Compounds (VOCs) released by the food are related to the flavor and can be considered as assistive markers in the production chain. Today, the analysis of VOCs requires fast, non-invasive, and solvent free devices. It has been shown that the VOCs can be extracted, identified, and measured with a Gas Chromatography-Mass Spectrometry (GC-MS) wit

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