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Дисертації з теми "Particulate contaminants"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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1

Su, Jia S. M. Massachusetts Institute of Technology. "Biological and particulate contaminants in interfaces." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120444.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 63-70).<br>The transport of biological, chemical, or particulate contaminants shapes disease transmission, chemical spills, climate, ecology, and bio-hazard risks. Yet, little is understood on the mechanisms controlling droplet formation and selection of droplet sizes and contamination levels from a contaminated water bulk. Bubbles play a critical role in shaping this transfer of chemicals, particula

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2

Backhouse, Christopher Morley. "Systematic effects of particulate contaminants of intravenous therapy." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47344.

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3

Xu, Daxue. "Analyses of Particulate Contaminants in Semiconductor Processing Fluids." Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc500968/.

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Particle contamination control is a critical issue for the semiconductor industry. In the near future, this industry will be concerned with the chemical identities of contaminant particles as small as 0.01 pm in size. Therefore, analytical techniques with both high chemical sensitivity and spatial resolution are required. Transmission electron microscopy (TEM) provides excellent spatial resolution and yields structural and compositional information. It is rarely used, however, due to the difficulty of sample preparation. The goals of this research are to promote the use of TEM as an ultrafine

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4

Spyak, Paul Raymond. "A cryogenic scatterometer and scatter from particulate contaminants on mirrors." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185209.

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The scattered light from particulate-contaminated mirrors was measured at visible and far-infrared wavelengths, and results were compared to that predicted by a theoretical model. In addition, a λ = 10.6 μm cryogenic scatterometer was constructed, and the temperature dependence of the scattered radiation was determined. The design and calibration of a λ = 10.6μm cryogenic scatterometer is presented. The BRDF is experimentally observed to have no measurable temperature dependence for the mirrors tested. Scatter data from oil-contaminated mirrors demonstrates some unexpected temperature dependen

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5

Billah, Md Baki. "Chemical and toxicological characterization of chemical contaminants in air pollution particulate matter." HKBU Institutional Repository, 2015. https://repository.hkbu.edu.hk/etd_oa/155.

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In wintertime hazy episodes, the air pollution in northern China has always reached to an alarming level. In the winter of 2012-13, the trans-boundary air pollution from China has attracted national and global attention. An elevated public awareness to the unprecedented pollution levels has prompted much investigation on the health effects of fine particulate matter (PM), in particular PM2.5. Since PM-elicited harmful effects primarily depends on the composition of chemical contaminants adsorbed, in this study we characterized the chemical compositions of PM2.5 and determined its associated

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6

Hallberg, Magnus. "Treatment conditions for the removal of contaminants from road runoff." Doctoral thesis, Stockholm : [Byggvetenskap, Kungliga Tekniska högskolan], 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4386.

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7

Kappanna, Hemanth K. "Reduction of toxic air contaminants (TACs) and particulate matter emissions from heavy-duty natural gas engines." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4553.

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Thesis (M.S.)--West Virginia University, 2006.<br>Title from document title page. Document formatted into pages; contains xiii, 182 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 135-142).

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8

Le, Meur Mathieu. "Matières en suspension de la Moselle (Lorraine, France) : caractérisation minérale et organique et réactivité vis-à-vis des contaminants métalliques." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0161/document.

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Les matières en suspension (MES) sont constituées de colloïdes et particules et sont couramment décrites comme des agrégats hétérogènes formées de phases minérales, organiques et biologiques et possédant une forte réactivité de surface. Cette étude vise à étudier l’évolution de composition spatiale et temporelle des MES de la rivière Moselle (Lorraine, France) et également d’étudier la réactivité des MES vis-à-vis de contaminants métalliques. Les MES ont été collectées à différentes stations le long de la rivière Moselle et selon différents régimes hydriques. Des études microscopiques et macro

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9

Rivas, Lara Ioar. "Air quality in schools and children’s exposure to particulate pollution in Barcelona." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/317968.

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L’exposició als contaminants atmosfèrics s’ha relacionat amb efectes negatius a la salut i els infants constitueixen un subgrup de la població particularment vulnerable. Es determinà la qualitat de l’aire a l’interior i exterior de 39 escoles de Barcelona i Sant Cugat del Vallès. El mateixos contaminants mesurats a les escoles també es monitoritzaren a una estació de fons urbà a Barcelona (UB-PR). Les concentracions de carboni negre equivalent (EBC), NO2 i partícules ultrafines (UFP) mostraren un gradient ascendent cap al centre de la ciutat, seguint el patró de densitat de trànsit rodat. E

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10

Kozii, Ivan, and Іван Козій. "Using a highly efficient gas cleaning equipment for reduction technogenic impact on the environment." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50966.

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1. Matus K.J., Nam K.-M., Selin N.E., Lamsal L.N., Reilly J.M. Health Damages from Air Pollution in China. Global Environmental Chang, 2012, vol. 22, no. 2, pp. 55-66. 2. Tronvil P. Developing standards: Global standards for air cleaning equipment. Filtration & Separation, 2008, vol. 45, no. 9, pp. 28-31. 3. Hession M. Incinerator and gas cleaning equipment overview. Health Estate J., 1997, vol.51, no. 8, pp. 6-7.<br>Growth in the scale of economic activity leads to increased human impacts and disturbance of equilibrium in the environment. Along with the depletion of natural resources increa

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11

Coelho, Cristiane Degobbi. "Análise dos contaminantes biológicos presentes no material particulado (PM2,5) de amostras da região metropolitana de São Paulo." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/5/5144/tde-25092009-144040/.

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INTRODUÇÃO: A poluição do ar traz diversos efeitos à saúde e, em particular, o material particulado menor do que 2,5 μm (PM2,5), está associado ao aumento das taxas de morbidade e mortalidade devido a doenças cardiorespiratórias. A maioria dos estudos foca apenas na composição química do material, porém os componentes do bioaerossol podem ser responsáveis por aproximadamente 22% da massa total. OBJETIVOS: Nesse estudo, objetivamos determinar a contribuição relativa de fungos e endotoxinas (constituinte da parede celular de bactérias gram-negativas) no PM2,5 e verificar possíveis efeitos i

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12

Shuttleworth, Emma Louise. "Tracing peatland geomorphology : sediment and contaminant movements in eroding and restored systems." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/tracing-peatland-geomorphology-sediment-and-contaminant-movements-in-eroding-and-restored-systems(6af5d1e1-f01a-4a1d-8ddd-f5027574c087).html.

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Peatlands are an important store of soil carbon, play a vital role in global carbon cycling, and can also act as sinks of atmospherically deposited heavy metals. Large areas of the UK’s blanket peat are significantly degraded and actively eroding, which negatively impacts carbon and pollutant storage. The restoration of eroding UK peatlands is a major conservation concern, and over the last decade measures have been taken to control erosion and restore large areas of degraded peat. In severely eroded peatlands, topography is highly variable, and an appreciation of geomorphological form and pro

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13

Sousa, Diana Nara Ribeiro de. "Ocorrência e distribuição de contaminantes emergentes na bacia hidrográfica do Rio Jundiaí - São Paulo." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/6332.

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Made available in DSpace on 2016-06-02T20:34:59Z (GMT). No. of bitstreams: 1 6522.pdf: 11813930 bytes, checksum: 7b3b28c9003cd9b02191060694246535 (MD5) Previous issue date: 2015-01-29<br>Universidade Federal de Sao Carlos<br>Three different classes of emerging contaminants were analyzed in surface water samples, suspended particulate matter (SPM) and sediments from the Jundiaí River Basin - SP. The hormones 17-β-estradiol and 17-α-ethinylestradiol were the only compounds that were not detected in the matrices studied. Caffeine was the compound detected with the highest concentrat

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14

Reinehr, Edelberto Luiz. "Simulação da dispersão de contaminantes particulados em atmosferas confinadas." Florianópolis, SC, 2003. http://repositorio.ufsc.br/xmlui/handle/123456789/86496.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Química.<br>Made available in DSpace on 2012-10-21T07:34:14Z (GMT). No. of bitstreams: 0<br>O presente trabalho apresenta a modelagem e simulação da dispersão de contaminantes particulados em atmosferas confinadas, na presença da convecção natural e mista. O ambiente apresenta um obstáculo (isotérmico ou aquecido) no seu interior. A ênfase do trabalho está centrada nos escoamentos com a presença de recirculações do fluido, que oscilam a sua posição no tempo. Utiliza-se a soluç

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15

Araya, Jofré Paz Isabel. "Efecto de la Utilización de Biodiesel Sobre las Emisiones de Vehículos Pesados." Tesis, Universidad de Chile, 2009. http://www.repositorio.uchile.cl/handle/2250/103518.

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El biodiesel es un combustible preparado en base a aceites vegetales, grasas animales, o desperdicios de aceites los cuales se hacen reaccionar con metanol o etanol para convertir las grasas triglicéridos en metil o etil ésteres vía transesterificación. Las características de este combustible lo hacen apropiado para funcionar en motores de ignición por compresión. En la actualidad el biodiesel se plantea como una alternativa o un complemento al diesel para los vehículos pesados, siendo entonces necesario establecer políticas para su producción y utilización en bases a los efectos que pueda

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16

Oyelami, Ayodeji Oluwaseun. "Impact of nano- and micro-particulate black carbon on organic contaminant bioaccessibility in soil." Thesis, Lancaster University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.663215.

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This thesis investigated the impacts of different forms of black carbon (BC) on the bioavailability and bioaccessibility of phenanthrene in soil for remediation. BC is a general term used to describe various forms of natural and engineered carbonaceous geosorbents, such as activated carbon (AC), biochar and soot. Carbon nanomaterials (CNMs) are generally agreed to be engineered structures with at least one dimension of less than 100 nanometres in length. CNMs are of interest because of their specific physicochemical properties that can be attributed to their small size, chemical composition, s

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17

Lemos, Andréia Torres de. "Investigação de contaminantes mutagênicos de matrizes ambientais em área de risco ecotoxicológico." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/37447.

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A crescente introdução de variados poluentes em matrizes ambientais de áreas urbanas causa prejuízos ao ecossistema e dificulta as medidas de controle ambiental. Essas substâncias, após liberadas, se distribuem e interagem de acordo com suas características e as do meio receptor. Indicadores precoces de contaminação permitem a adoção de medidas preventivas aos danos causados pela poluição ambiental. O presente estudo teve por objetivo investigar a ação de substâncias genotóxicas em diferentes frações de material particulado atmosférico e solos, analisando a presença de contaminantes orgânicos

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18

Del, Aguila López Carlos Isaid. "Hidrocarburos aromáticos polinucleares (HAPs) en material particulado de la ciudad de Lima." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2018. https://hdl.handle.net/20.500.12672/10136.

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Determina un grupo particular de compuestos, los hidrocarburos aromáticos policíclicos conocidos tambien como hidrocarburos aromáticos polinucleares (HAPs o PAHs) en el aire ambiente de Lima. Se sabe que el origen de tales compuestos está relacionado con los procesos de combustión de la materia orgánica. Debido al escaso desarrollo industrial del país, se puede afirmar que, en el caso de Lima, tales compuestos provienen principalmente de las emisiones de los automóviles, esto es, el uso de combustibles fósiles. Las muestras, colectadas inicialmente para determinar partículas menores a 10um (PM

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19

Mancilha, José Carlos. "Estudo do comportamento químico do ferro micro e nano particulado na despoluição de solos contaminados com metais pesados." Instituto Nacional de Pesquisas Espaciais, 2006. http://urlib.net/sid.inpe.br/mtc-m17@80/2007/02.15.18.02.

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O poder do ferro nanoparticulado apresenta uma nova geração de tecnologia para remediação ambiental, que deverá promover soluções relevantes na limpeza de solos ou áreas contaminadas por despejos de indústrias galvânicas, fertilizantes, curtumes, mineração e outros passivos ambientais relacionados à poluição, com metais pesados perigosos. Os estudos do comportamento dos metais pesados perigosos, em excesso na litosfera, são de grande importância para a recuperação de solos, que tiveram suas características originais modificadas em função do seu uso ou manuseio inadequado, servindo como depósit

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20

Salazar, Ruiz Enriqueta. "Desarrollo de modelos predictivos de contaminantes ambientales." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/2504.

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El desarrollo de modelos matemáticos predictivos de distinto tipos de fenómenos son aplicaciones fundamentales y útiles de las técnicas de Minería de Datos. Un buen modelo se convierte en una excelente herramienta científica que requiere de la existencia y disposición de grandes volúmenes de datos, además de habilidad y considerable tiempo aplicado del investigador para integrar los conocimientos más relevantes y característicos del fenómeno en estudio. En el caso concreto de ésta tesis, los modelos de predicción desarrollados se enfocaron en la predicción contaminantes ambientales como el

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21

Singh, Umesh M. D. "Environmental Exposures to Airborne Microbial Sub-micrometer Particles and Airway Inflammation in Children." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1318607732.

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22

Josefsson, Sarah. "Fate and transport of POPs in the aquatic environment : with focus on contaminated sediments." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-42107.

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Persistent organic pollutants (POPs) are hydrophobic substances that readily sorb to organic matter in particles and colloids instead of being freely dissolved in the water phase. This sorption affects the bioavailability and environmental transport of the POPs. The major part of this thesis concerns the role of sediments as secondary sources of POPs. As the primary emissions decrease, contaminated sediments where POPs have accumulated can become the main source of contamination. If the contaminated sediment by time becomes covered with cleaner layers, the POPs are buried and no longer in con

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23

Sanfélix, Forner Vicenta. "Metodologías para la cuantificación de las emisiones difusas de material particulado en entornos industriales." Doctoral thesis, Universitat Jaume I, 2017. http://hdl.handle.net/10803/405765.

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El transporte, almacenamiento y manipulación al aire libre de materiales sólidos pulverulentos conlleva frecuentes episodios de contaminación atmosférica por emisiones difusas de material particulado (PM), cuyo impacto sobre la calidad del aire y el medio ambiente puede llegar a ser significativo. Desde un punto de vista técnico y legislativo a este tipo de emisiones se les ha prestado tradicionalmente una atención limitada, debido probablemente a la complejidad inherente que conlleva la cuantificación y control de las emisiones difusas de PM En este contexto y con el objeto de conocer con m

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24

Winkelmann, Kay Hasko. "On the applicability of imaging spectrometry for the detection and investigation of contaminated sites with particular consideration given to the detection of fuel hydrocarbon contaminants in soil." kostenfrei, 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976701782.

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25

Leal, Federico. "Potential air contaminants and noise levels generated by the Kodak NexPress 2500 Digital Production Color Press : a study of its emissions of respirable dust, ultrafine particulates, volatile organic compounds, ozone, and occupational noise exposure /." Online version of thesis, 2007. http://hdl.handle.net/1850/4487.

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26

Ramirez, Coripuna Julio Anghelo. "Ensamblaje y estudio del diseño, construcción y caracterización de microsensores voltamperométricos integrados para análisis simultáneo de gases y material particulado contaminantes del aire. (Para su aplicación en una estación de medición a tiempo real)." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2017. https://hdl.handle.net/20.500.12672/6532.

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Ensambla un sistema integrado de siete microsensores. Estudia su funcionamiento en la medida simultánea y a tiempo real de seis gases y de material particulado. El prototipo cumple con las especificaciones reglamentarias para aplicaciones en el monitoreo de la calidad del aire. Los gases censados fueron SO2, NO2, O3, NO, CO y H2S, así como el material particulado, entre 2,5 y 10 micras. En este trabajo se enfatizó en las pruebas de operatividad y funcionamiento de los sensores electroquímicos, desarrollo del método de medición y la implementación del sistema de inyección. Se desarrollaron prue

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27

Persson, Ylva. "Chlorinated organic pollutants in soil and groundwater at chlorophenol-contaminated sawmill sites." Doctoral thesis, Umeå : Department of Chemistry, Umeå University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-989.

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28

Robles, Morales Eder Guido. "La contaminación del aire por material particulado y su relación con las enfermedades de tipo respiratorio en la población de Cerro de Pasco, 2010 y 2016." Master's thesis, Universidad Nacional Mayor de San Marcos, 2020. https://hdl.handle.net/20.500.12672/11675.

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La población de Cerro de Pasco se encuentra emplazada próxima al tajo abierto, donde se desarrolla la explotación minera. La investigación tuvo como objetivo determinar la relación que existe entre el material particulado (PM10) debido a la operación del tajo abierto “Raúl Rojas” y las enfermedades respiratorias agudas (IRAS) que afectó a la población de la ciudad de Cerro de Pasco, durante los años 2010 y 2016. Se cuantificó las concentraciones de material particulado de las cuatro estaciones de monitoreo de la calidad de aire y el número de atenciones hospitalarias ocurridas en la estación

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29

Ho, Huai-Tien, and 何懷天. "Distributions of particulate hydrophobic organic contaminants in coral reef waters, Kenting." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/62500888831190825464.

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碩士<br>國立東華大學<br>海洋生物多樣性及演化研究所<br>97<br>Settling particles and surface sediments were seasonally collected in Kenting coral reef waters of south Taiwan by using four sediment traps deployed at 6-10 m depth between Oct. 12, 2007 and Oct. 8, 2008. Polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB) and polybrominated diphenyl ethers (PBDE) were analyzed to determine their temporal and spatial variations. Total settling particles (TSP) in the wet season were significantly higher than the dry season (197.8 > 6 mg/cm2•day), except at the Inlet site. Lateral inputs of particles an

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30

Fuller, Christopher Byron. "Ecological Effects and In-situ Detection of Particulate Contaminants in Aqueous Environments." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9334.

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The ecological effects and mechanistic efficiency of chemical oil spill countermeasures must be evaluated prior to their ethical application during real spill response scenarios. Equally important is the ability to monitor the effectiveness of any spill response in real time, permitting informed response management. In-situ sensors are key components of such event based monitoring and continuous monitoring programs. This project investigates crude oil toxicity as a particulate suspension, suitability of in-situ instrumentation to measure crude oil suspensions, and the applicability of using

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31

Darwano, Hicham. "Développement d’une méthode d’extraction des contaminants émergents dans les solides particulaires par LDTD-APCI-MS/MS." Thèse, 2013. http://hdl.handle.net/1866/10599.

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Douze contaminants émergents (composés pharmaceutiques, pesticides et hormones) ont été quantifiés et extraits de l'eau de rivières et d’échantillons d'eaux usées municipales. La séparation des solides en suspension est effectuée par filtration des échantillons d'eau. L'effet de filtration sur les concentrations de contaminants dissous a été évaluée afin de minimiser les pertes de composés cibles. Les échantillons ont été lyophilisés et ont été extraits en deux cycles par ultrasons combinés avec une étape de nettoyage sur cartouche d’extraction de type C18. La quantification a été réalisée en

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32

Hammons, Jessica Lynn. "Role of Acidity in Mobilizing Colloidal Particulate Matter From Natural Sand Grain Surface." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10627.

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Mobilization of colloidal particulate matter (most important, clay particles) from a soil matrix in the subsurface environment is an important environmental process. As many contaminants tend to adsorb onto various colloidal mineral particles, co-transport of contaminants in association with mobilized particles could contribute significantly to the migration of these contaminants in the environment. Numerous studies have observed the effects of pH on colloid mobilization but have overlooked the possible direct role of acidity. This study looked at the role of acidity with H⁺ as a chemical a

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33

D'Avila, Lucas. "Gestão da qualidade do ar interior em ambiente hospitalar." Master's thesis, 2020. http://hdl.handle.net/10198/22889.

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A qualidade do ar interior (QAI) em ambiente hospitalar é um fator essencial no controlo de exposição a poluentes e infeções nosocomiais. Este estudo teve por objetivo caracterizar o ar interior do bloco operatório e do serviço de esterilização da Unidade Hospitalar de Bragança em termos de parâmetros físico-químicos e microbiológicos; relacionar a QAI em função das características estruturais do edifício e padrão de utilização; identificar os pontos críticos e propor medidas de melhoria. A campanha de medições decorreu nos meses de janeiro a março de 2019, totalizando 10 ensaios. Os parâmetro

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Lira, Fabiane Soares. "Qualidade do ar interior em habitações do Nordeste de Portugal: a influência dos sistemas de aquecimento doméstico." Master's thesis, 2017. http://hdl.handle.net/10198/19720.

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Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná<br>Atualmente são imensas as evidências que mostram que a qualidade do ar no interior das habitações se apresenta mais deteriorada do que a qualidade do ar em ambientes exteriores. A exposição ao ar interior tem, por isso, um efeito negativo na saúde humana, principalmente de crianças e idosos. As fontes que emitem gases ou partículas para o ar, como os sistemas de aquecimento a biomassa lenhosa, podem ser a principal causa dos problemas de Qualidade do Ar Interior (QAI). Este estudo teve por objetivo avaliar

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Winkelmann, Kay Hasko [Verfasser]. "On the applicability of imaging spectrometry for the detection and investigation of contaminated sites with particular consideration given to the detection of fuel hydrocarbon contaminants in soil / vorgelegt von Kay Winkelmann." 2005. http://d-nb.info/976701782/34.

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