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Dissertations / Theses on the topic 'Breakthrough curves'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Semuwemba, James. "Modelling tracer breakthrough curves to determine stream reaeration and hydrodynamic properties." Thesis, Queen's University Belfast, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580085.

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This study investigates and applies robust modelling techniques for analysis of tracer concentration versus time curves (so-called breakthrough curves; BTCs) for the direct (gas) tracer technique in an attempt to quantify more accurately both the reaeration coefficient (K2) and other hydrodynamic parameters with associated uncertainties. Three issues related to the Peak, Modified Peak and Area methods (the standard methods in literature) used to compute K2 from tracer BTCs have been addressed. (a) The three methods rely on the presumption that transport is prescribed by the Advection-Dispersio

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2

Wang, Huaguo. "Describing and Predicting Breakthrough Curves for non-Reactive Solute Transport in Statistically Homogeneous Porous Media." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29777.

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The applicability and adequacy of three modeling approaches to describe and predict breakthough curves (BTCs) for non-reactive solutes in statistically homogeneous porous media were numerically and experimentally investigated. Modeling approaches were: the convection-dispersion equation (CDE) with scale-dependent dispersivity, mobile-immobile model (MIM), and the fractional convection-dispersion equation (FCDE). In order to test these modeling approaches, a prototype laboratory column system was designed for conducting miscible displacement experiments with a free-inlet boundary. Its perfo

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3

Vogel, Thomas [Verfasser]. "Characterization and Sensitivity Analysis of Tracer Breakthrough Curves with respect to Multi Continuum Modeling / Thomas Vogel." Aachen : Shaker, 2006. http://d-nb.info/1186584815/34.

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4

Ramos, Josy Eliziane Torres. "Carbono ativado com metais suportados como adsorventes para dessulfuraÃÃo profunda da gasolina comercial." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12472.

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FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>No presente estudo foram preparados materiais carbonosos modificados mediante a impregnaÃÃo de metais (cobre, prata e palÃdio) para a remoÃÃo de enxofre a partir de soluÃÃes sintÃticas de benzotiofeno numa concentraÃÃo de 50 a 400ppm em iso-octano e em amostras de gasolina comercial. A adsorÃÃo do benzotiofeno em soluÃÃo de iso-octano (mistura modelo) foi avaliada atravÃs de experimentos em coluna de leito fixo recheada com carbonos ativados com e sem impregnaÃÃo de metais em trÃs temperaturas distintas: 30, 45 e 60ÂC. C

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5

Rodrigues, Anne Kerolaine de Oliveira. "AdsorÃÃo de MolÃculas Sulfuradas AromÃticas em Adsorventes Mesoestruturados Ã Base de SÃlica." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6558.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>A exigÃncia de um maior controle na emissÃo de poluentes de automÃveis, com uma reduÃÃo na emissÃo de enxofre, tem levado a um intenso esforÃo de pesquisas sobre tÃcnicas de remoÃÃo de sulfurados nos combustÃveis. Nos Ãltimos anos, a adsorÃÃo Ã vista como uma tÃcnica alternativa adequada para atingir os nÃveis de dessulfurizaÃÃo das correntes das unidades de processo de hidrodessulfurizaÃÃo (HDS). O processo HDS Ã muito eficiente na remoÃÃo de mercaptanas e dissulfetos, porÃm maior severidade seria necessÃria para converter as molÃ

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6

Sampaio, Carlos Danillo Cavalcante. "Uso de adsorvente à base de lodo biológico na remoção de sulfeto de hidrogênio de corrente gasosa." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-26102016-103752/.

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O objetivo deste estudo foi realizar ensaios de adsorção dinâmica, em coluna de leito fixo sem etapa regenerativa, para tal finalidade utilizou-se como adsorventes o carvão ativado comercial e material adsorvente à base de lodo biológico, para o tratamento de sulfeto de hidrogênio em corrente gasosa e obtenção das capacidades de adsorção. O lodo foi obtido de forma bruta em estação de tratamento de efluentes de abatedouro de aves, e tratado por processos térmicos e químicos em laboratório, para a geração de adsorvente. A concentração de H2S alimentada foi de 500 ppm na coluna, presente em dua

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7

Garcia, Carolina Gil. "Montagem e operação de unidade de adsorção em leito fixo para remoção de H2S de corrente gasosa." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-01092014-092813/.

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O H2S é um gás que causa preocupação devido aos efeitos que pode provocar a saúde, a corrosão sobre alguns materiais e a redução do poder calorífero no aproveitamento de biogás, mesmo quando presente em baixas concentrações. O uso de biogás como fonte energética tem crescido nos últimos anos, impulsionando a remoção do sulfeto de hidrogênio, uma vez que a presença de tal gás reduz a capacidade calorífica do biogás e causa danos às instalações. Diante disso, várias técnicas são utilizadas na remoção de H2S, sendo uma delas, a adsorção. Os processos de separação por adsorção são muito utilizados

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8

Efome, Johnson Effoe. "Development and Characterization of Novel Nanofibrous Metal–Organic Framework Adsorption Membranes for Water Treatment." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38245.

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Membrane technology has become a predominant process in providing one of the key components of life (water), either through water and wastewater treatment for water quality purposes or desalination as seen in Ultra-filtration, Nano-filtration, Reverse osmosis, Membrane distillation, Pervaporation, among others. With the ever-increasing demand for portable water due to population increase, constant research has focused on the improvements of the performances of the different water treatment systems including enhancing the performance of the membrane. Among all the different membrane performance

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9

Ramos, Josy Eliziane Torres. "Estudo de EquilÃbrio e CinÃtica de AdsorÃÃo em Resinas de Troca IÃnica Aplicado Ã SeparaÃÃo CromatogrÃfica ContÃnua de Frutose e Glicose do Xarope de Caju." Universidade Federal do CearÃ, 2008. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2475.

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FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>A cajucultura Ã considerada uma das atividades sÃcio-econÃmicas mais importantes da regiÃo Nordeste do Brasil. Apesar de ser empregado industrialmente para fabricaÃÃo de polpa, bebidas e doces, o pedÃnculo do caju apresenta altÃssimos nÃveis de desperdÃcio. Pouco mais de 10% da produÃÃo agrÃcola Ã explorada comercialmente. Neste contexto, a obtenÃÃo de produtos de valor agregado a partir do pedÃnculo do caju â como xaropes de frutose e glicose â pode indicar rotas econÃmicas alternativas para as regiÃes produtoras, aprov

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10

Pinto, Mendes Patricia Alexandra. "Séparation des isomères de l’hexane par des solides hybrides poreux (MOFs)." Thesis, Versailles-St Quentin en Yvelines, 2014. http://www.theses.fr/2014VERS0055/document.

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Le principal objectif de cette recherche est l’évaluation de nouveaux adsorbants nommés Metal-Organic Frameworks (MOFs) pour la séparation des isomères de l'hexane afin d'améliorer l'indice d'octane de l’essence. La séparation des isomères de l'hexane est actuellement réalisée par Total Isomerization Processes (TIP) basé sur l’utilisation de la zéolithe 5A qui permet d’isoler les paraffines «non normales». Afin d'améliorer et de tester d’autres adsorbants, des structures MOFs flexibles et rigides ont été synthétisées et évaluées pour cette séparation au travers de séries de courbes de perçage

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11

Ficicilar, Berker. "Carbon Dioxide Removal In Steam Reforming: Adsorption Of Co2 Onto Hydrotalcite And Activated Soda." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605346/index.pdf.

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Conversion of natural gas and other light hydrocarbons via steam reforming is currently the major process for hydrogen production. However, conventional hydrogen production technologies are not cost effective and therefore, cost is the biggest impediment to use hydrogen in fuel cell applications. In order to optimize and overcome cost problems in hydrogen production, sorption and membrane enhanced reaction processes are the two novel technologies for in situ operation of reforming and removal of carbon dioxide. Adsorption of carbon dioxide onto activated hydrotalcite and activated soda, obtai

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12

Delachaux, Florine. "Étude de la faisabilité d'un procédé d’adsorption gaz-solide pour le traitement des NOx et CO en présence d'eau : application aux émissions de moteurs diesel en espaces confinés." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0273/document.

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Depuis 2012, les gaz d’échappement diesel sont considérés comme cancérigènes, ce qui représente un risque pour les travailleurs quotidiennement exposés à ces fumées. Cette étude s’intéresse plus particulièrement aux oxydes d’azotes (NOx) et au monoxyde de carbone (CO) présents dans l’échappement diesel. Actuellement, des solutions catalytiques permettent de réduire la concentration de sortie de ces composés mais elles ne sont pas viables pour les véhicules non routiers fonctionnant de façon discontinue et pour solutionner la problématique du « cold start ». La thèse s’est alors orientée vers l

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13

Delachaux, Florine. "Étude de la faisabilité d'un procédé d’adsorption gaz-solide pour le traitement des NOx et CO en présence d'eau : application aux émissions de moteurs diesel en espaces confinés." Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0273.

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Depuis 2012, les gaz d’échappement diesel sont considérés comme cancérigènes, ce qui représente un risque pour les travailleurs quotidiennement exposés à ces fumées. Cette étude s’intéresse plus particulièrement aux oxydes d’azotes (NOx) et au monoxyde de carbone (CO) présents dans l’échappement diesel. Actuellement, des solutions catalytiques permettent de réduire la concentration de sortie de ces composés mais elles ne sont pas viables pour les véhicules non routiers fonctionnant de façon discontinue et pour solutionner la problématique du « cold start ». La thèse s’est alors orientée vers l

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14

Llerar, Meza Gerónimo. "Upscaling nonreactive solute transport." Doctoral thesis, Universitat Politècnica de València, 2009. http://hdl.handle.net/10251/5848.

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This thesis focuses on solute transport upscaling. Upscaling of solute transport is usually required to obtain computationally efficient numerical models in many field applications such as, remediation of aquifers, environmental risk to groundwater resources or the design of underground repositories of nuclear waste. The non-Fickian behavior observed in the field, and manifested by peaked concentration profiles with pronounced tailing, has questioned the use of the classical advection-dispersion equation to simulate solute transport at field scale using numerical models with discretizations th

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15

Lucas, Murilo Cesar. "Migração de solutos em basalto fraturado: quantificação experimental em laboratório e validação matemática." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-05072016-083427/.

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A avaliação do risco a contaminação e a escolha de técnicas de remediação de poluentes em aquíferos fraturados depende da quantificação dos fenômenos envolvidos no transporte de solutos. A geometria da fratura, usualmente caracterizada pela abertura, é o principal parâmetro que indiretamente controla o transporte nos aquíferos fraturados. A simplificação mais comum desse problema é assumir que as fraturas são um par de placas planas e paralelas, isto é, com uma abertura constante. No entanto, por causa do limitado número de trabalhos experimentais, não está esclarecida a adequabilidade do uso

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16

Peralta, David. "Evaluation des Metal-Organic Frameworks en adsorption et séparation des hydrocarbures." Phd thesis, Université de Haute Alsace - Mulhouse, 2011. http://tel.archives-ouvertes.fr/tel-00730462.

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L'objectif de cette thèse était d'évaluer quelques Metal-Organic Frameworks (MOFs), choisis en fonction de leur taille de pores, de leur volume poreux et de leur stabilité thermique, en adsorption et séparation des hydrocarbures. Pour étudier le comportement général des MOFs nous avons choisi des MOFs avec des centres métalliques insaturés, des MOFs à charpente anionique et des ZIFs neutres et avons étudié leur sélectivité en séparation de trois familles d'hydrocarbures, à savoir alcanes, alcènes, aromatiques. Les MOFs à centre métallique insaturé se comportent généralement comme des zéolithes

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17

Marcus, Patrick. "Entwicklung und Validierung eines Labor-Schnelltests zur Beurteilung der Adsorbierbarkeit von organischen Einzelstoffen an Aktivkohle." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1133172373836-74002.

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Zur Entfernung von anthropogenen organischen Spurenstoffen werden bei der Wasseraufbereitung sehr oft Aktivkohle-Festbettadsorber eingesetzt. Dabei konkurrieren die organischen Einzelstoffe während des Adsorptionsprozesses mit dem adsorbierbaren Anteil der natürlichen Wasserinhaltsstoffe um die aktiven Zentren der Aktivkohle. Durch dieses Konkurrenzverhalten ist es sehr schwierig, für einen zu untersuchenden organischen Einzelstoff seine Entfernbarkeit mittels Aktivkohle abzuschätzen. Gleichzeitig werden der Liste der aus dem Wasser zu entfernenden Substanzen ständig neue Stoffe hinzugefügt. D

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18

Patel, Mihirkumar S. "EVALUATION OF MASS TRANSFER RATE IN COLUMN OF SMALL LiLSX PARTICLES." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1494602230267353.

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19

Voltan, Paulo Eduardo Nogueira. "Remoção de diuron e hexazinona por meio de adsorção em carvão ativado, oxidação e tratamento em ciclo completo." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-30032017-085628/.

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Na região de Ribeirão Preto está localizado um dos pólos produtores de cana-de-açúcar uma das principais culturas da economia brasileira, com vasta área cultivada e uso intensivo de herbicidas, dos quais é preciso destacar o diuron e a hexazinona, pois ambos possuem elevado potencial de contaminação em águas superficiais e subterrâneas. Diversas tecnologias podem ser utilizadas para remover da água esses microcontaminantes, pelo fato de, neste caso, não ser eficiente a técnica de tratamento em ciclo completo (ou convencional). Neste trabalho de pesquisa foram investigadas as combinaçõ

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20

Scullin, Jerome. "Study of the Dilution of a chemical spill through tracer experiments in the Käppala Association's Sewerage Network, Stockholm." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298256.

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Wastewater treatment plants (WWTPs) play a vital role in protecting the environment from much of the waste produced by humans. This includes not only human waste, but everything that makes its way into a sewerage system including greywater, stormwater, and potentially hazardous chemicals from, inter alia, chemical spills. The effects of a chemical spill if it enters a WWTP can be disastrous, resulting in the ineffective treatment of incoming water for prolonged periods of time (Söhr, 2014). This can lead to one of the dilemmas of urban wastewater systems, notably, whether it is more damaging

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21

Ferreira, dos Santos Maria do Carmo. "Adaptació transcultural i validació de la versió catalana i castellana de l'escala Breakthrough Pain Assessment Tool en persones amb càncer." Doctoral thesis, Universitat de Girona, 2020. http://hdl.handle.net/10803/670775.

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Breakthrough cancer pain due to its characteristics, fast onset, short duration and high severity implies a significant reduction in the quality of 2/2 life perceived by affected persons. For this reason, breakthrough pain deserves recognition, diagnosis, evaluation with specific scales, suitable early treatment and continuous follow-up. A descriptive and cross-sectional study was carried out, through an individual interview of 150 people with cancer and breakthrough pain, hospitalized at the Catalan Institute of Oncology of Girona (Catalonia, Spain) for the cross-cultural adaptation

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22

Hoskins, Tyler Courtney. "Water and nutrient transport dynamics during the irrigation of containerized nursery crops." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/48165.

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Increased water- and fertilizer-use-efficiency in containerized crop production, via reduced water loss, enhances crop-available nutrients while reducing non-point source agrichemical contributions in accordance with regulatory standards. Previous studies detailed nutrient leaching patterns throughout crop production seasons, leaving little known about water and dissolved nutrient (solute) movement through soilless substrates during irrigation. The following experiments evaluated fundamental water and solute transport principles through pine-bark based substrates. 1) Ilex crenata Thunb. 'Benne

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23

Pürschel, Madlen. "Uptake of natural organic matter (NOM) fractions by anion exchangers in demineralisation and drinking water plants." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-132955.

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The elimination of natural organic matter (NOM) is an important aim of water treatment in demineralisation plants of power stations. NOM is regarded as corrosion risk factor in the steam water cycle because of its potential to decompose into low-molecular-weight (LMW) acids and carbon dioxide. Further, the removal of NOM is also one of the main objectives in the drinking water production, since it can cause i) colour, taste and odour problems, ii) formation of carcinogen halogenated disinfection by-products (DBPs) after disinfection with chlorine and iii) bacterial growth in the water distribu

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Araújo, Hugo André Soares de. "A utilização de pérolas de quitosana para adsorção de cromo hexavalente em coluna de leito fixo." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-19032019-164203/.

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A intensificação da degradação ambiental impulsionada pelas atividades antrópicas tem comprometido a qualidade da água. A presença de metais potencialmente tóxicos no ambiente provoca diversos impactos na fauna e flora, como, por exemplo, o processo de magnificação trófica. Assim, é fundamental que estudos de adsorção desses contaminantes sejam realizados, a fim de buscar novos métodos que permitam a remoção dos mesmos no meio aquático. O metal crômio está nos efluentes de diversos processos industriais, como curtumes, refino de petróleo, galvanoplastia, soldagem e cromagem. Esse metal na form

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Tetteh, Emmanuel. "Adsorption of Pharmaceuticals and Endocrine Disrupting Compounds using Unmodified and Surfactant Modified Palygorskite-Montmorillonite Clay Particles in Batch and Fixed Bed Column Modes." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1543583842195458.

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Viel, Emélie. "Etude des processus de transport des solutés hors équilibre physique : application à la zone non saturée des calcaires de Beauce." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2039/document.

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L’objectif de ce travail est d’étudier les phénomènes de transport des solutés hors équilibre physique dans la ZNS des Calcaires de Beauce. Cette étude a été réalisée en deux parties, une partie laboratoire qui a consisté en la réalisation d’expériences d’élution sur colonnes non perturbées en régime permanent pour trois intensités de précipitation (4, 8, 16 mm/h) et en régime transitoire avec ou sans drainage, en condition non saturées. Les colonnes ont été prélevées dans deux faciès de la ZNS des Calcaires de Beauce : un faciès homogène et un faciès hétérogène. La seconde partie de cette étu

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27

Teepakorn, Chalore. "Numerical simulation and experimental study of membrane chromatography for biomolecule separation." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10299/document.

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La chromatographie membranaire est une alternative à la chromatographie classique sur résine basée sur le transport convectif des solutés à travers une membrane microporeuse plutôt que par le transport diffusif des solutés dans les particules de résines. Cette technique présente les avantages de diminuer les phénomènes de diffusion, de réduire les temps de séjour et les pertes de charge, et de permettre la purification rapide de quantités importantes de molécules. La chromatographie membranaire connaît un fort succès commercial. Une gamme importante de membranes chromatographiques mettant en j

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Dikinya, Oagile. "The effects of self-filtration on saturated hydraulic conductivity in sodic sandy soils." University of Western Australia. School of Earth and Geographical Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0051.

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[Truncated abstract] Self-filtration is here defined as particle detachment and re-deposition causing re-arrangement of the particles and therefore pore space which affects water flow in soil by decreasing hydraulic conductivity. This is of particular important in soils which are susceptible to structural breakdown. The objective of this thesis was to examine the dynamics of the self-filtration process in sodic sandy soils as affected by ionic strength and soil solution composition. The temporal changes of hydraulic conductivity and the elution of fine particles from soil columns were used as

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Rodrigues, Alyne Freitas da Silva Bordalo. "Dessulfurização de butano líquido por adsorção mediante utilização de peneira molecular 13X." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-18012017-085923/.

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Atualmente, o tipo de propelente para produtos em aerossol mais usado no mundo é uma mistura de hidrocarbonetos leves (butano e propano - sendo o primeiro em maior proporção). Parte de seu processo de produção é a dessulfurização do butano líquido, através de adsorção em leito fixo usando peneiras moleculares 13X. A literatura científica não apresenta muitas publicações sobre o tema e considerando que a técnica de adsorção é fortemente dependente de dados experimentais para seu maior entendimento, é objetivo deste trabalho estudar este processo através do equilíbrio de adsorção, das curvas de

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Al, Atrach Jaouad. "Advanced design οf zeοlitic materials fοr the adsοrptiοn/separatiοn οf CΟ2, Ν2, and CΗ4 mοlecules". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMC234.

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Ce travail de thèse porte sur l’optimisation des matériaux zéolithiques à petits pores dans le butd'améliorer leur capacité d'adsorption du CO2 et leur efficacité en séparation des gaz. Dans cecontexte, cette étude se concentre sur l'amélioration des performances des zéolithes à traversl'échange ionique, le contrôle de la taille des cristaux et la synthèse de nouveaux adsorbants. Deszéolithes de type Gismondine (GIS) échangées avec des cations Mg2+ ont été synthétiséesdémontrant une meilleure sélectivités pour CO2/N2 et CO2/CH4 grâce à un échange cationiquespartiel avec Mg2+, ce qui influencé

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Lin, Guo Liang, and 林國良. "Adsorption Studies of Cu2+/Zn2+ Binary Component Aqueous Solution on Chitosan：Adsorption Isotherms and Breakthrough Curves." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/51358693929695028000.

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碩士<br>長庚大學<br>化工與材料工程學系<br>98<br>Adsorption of aqueous Cu2+ and Zn2+ on flaky chitosan are carried out in a stirred batch reactor. Langmuir type and Freundlich type equations are used to fit the single component adsorption isotherm. The smaller average error for Langmuir isotherm (6-23%) shows that Langmuir isotherm is better than Freundlich isotherm to express the adsorption equilibrium. For pH in the range of 3 to 5, adsorption capacities of Cu2+ and Zn2+ increases with the increase of pH. The experiment results show that chitosan is favor to adsorb Cu2+. The diffusivities of Cu2+ and Zn2+ i

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Wu, Cheng-Yuan, and 吳政原. "Dynamic adsorption study by a gas phase FTIR and prediction of breakthrough curves using the neural." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/77627465998760278730.

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博士<br>中原大學<br>化學工程研究所<br>95<br>Instead of the traditional gas chromatography(GC), a gas-phase Fourier Transformation-IR（FT-IR）spectrometer was used to measure the evolution of concentrations of these volatile organics due to its quick response to the instantaneous changes of the gas concentration. The results show that breakthrough curves were effected by the initial concentration, the flow rate, the adsorbent weight and the relative humidity. And the breakthrough time decreases with the increase of initial concentration, and flow rate and the decrease of adsorbent weight. The relative humidit

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Vogel, Thomas [Verfasser]. "Characterization and sensitivity analysis of tracer breakthrough curves with respect to multi continuum modeling / vorgelegt von Thomas Vogel." 2005. http://d-nb.info/974659479/34.

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Ribeiro, Diogo Rafael Pacheco. "Bioactive compounds separation with simulated moving bed technology." Master's thesis, 2019. http://hdl.handle.net/10773/30277.

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The pharmaceutical industry is developing a growing interest in natural compounds with biological and nutritional properties. Betulinic and oleanolic acids are two naturally occurring triterpenic acids, which possess such characteristics. These two compounds can be extracted from natural resources, i.e., from the bark of Eucalyptus globulus. However, their separation is difficult because these compounds present similar structures (they are constitutional isomers). In this work, the chromatographic separation of betulinic and oleanolic acids from representative extracts of E. globulus was stud

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Ross, Cody. "Assessment of soil water movement and the relative importance of shallow subsurface flow in a near-level Prairie watershed." 2017. http://hdl.handle.net/1993/32058.

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Near-level Prairie landscapes have received limited attention in hydrological research. For this thesis, hydrometric measurements and four tracing experiments were completed at three “riparian-to-stream” sites in the Catfish Creek Watershed (southeastern Manitoba) to enhance Prairie hydrology understanding. First, hydrologic state variables were examined to infer vertical and lateral water movement. Second, tracer data were analyzed to evaluate the relative importance of surface versus subsurface water movement. Results show that hydrologic state variables can be useful for inferring riparian-

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CAI, SHENG-RU, and 蔡聖儒. "The effect of longterm application of phosphate fertilizers on the breakthrough curve of the soil." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/87133989130802554231.

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Luo, Lifang Lin Hangsheng. "Quantification of soil macropore network and its relationship to preferential flow using combined x-ray computed tomography and breakthrough curve analysis." 2009. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-3370/index.html.

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Páscoa, Ângela Patrícia Coelho. "Modelação e simulação matemática da adsorção em leito fixo. Aplicação à adsorção de CO2 em Zeólito 4A." Master's thesis, 2017. http://hdl.handle.net/10198/18297.

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A aplicação da adsorção como um meio de separar misturas é hoje considerada uma técnica competitiva entre outras clássicas como a destilação, extracção, etc. O método recorre geralmente à coluna de adsorção contendo um sólido microporoso com propriedades específicas para separar as misturas em causa. Nesse aspecto, a presente dissertação foi dedicada à formulação de um modelo matemático para simular o comportamento de adsorção de misturas gasosas que fluem através de um leito fixo contendo adsorventes microporosos. Determinou-se a solução numérica das equações diferenciais parciais acop

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Pürschel, Madlen. "Uptake of natural organic matter (NOM) fractions by anion exchangers in demineralisation and drinking water plants." Doctoral thesis, 2013. https://tud.qucosa.de/id/qucosa%3A27481.

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The elimination of natural organic matter (NOM) is an important aim of water treatment in demineralisation plants of power stations. NOM is regarded as corrosion risk factor in the steam water cycle because of its potential to decompose into low-molecular-weight (LMW) acids and carbon dioxide. Further, the removal of NOM is also one of the main objectives in the drinking water production, since it can cause i) colour, taste and odour problems, ii) formation of carcinogen halogenated disinfection by-products (DBPs) after disinfection with chlorine and iii) bacterial growth in the water distribu

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(5930285), Karen N. Son. "Improved Prediction of Adsorption-Based Life Support for Deep Space Exploration." Thesis, 2019.

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<div>Adsorbent technology is widely used in many industrial applications including waste heat recovery, water purification, and atmospheric revitalization in confined habitations. Astronauts depend on adsorbent-based systems to remove metabolic carbon dioxide (CO<sub>2</sub>) from the cabin atmosphere; as NASA prepares for the journey to Mars, engineers are redesigning the adsorbent-based system for reduced weight and optimal efficiency. These efforts hinge upon the development of accurate, predictive models, as simulations are increasingly relied upon to save cost and time over the traditiona

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