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Dissertations / Theses on the topic 'Ion exchange adsorption'

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Published: 4 June 2021

Last updated: 18 February 2022

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1

Watkins, E. James. "Foulant adsorption onto ion exchange membranes." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/7062.

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2

Leonard, Danièle. "Adsorption of bile acids by ion-exchange resins." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74309.

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The interactions of cholestyramine with bile acids in aqueous buffer solutions were studied by in vitro adsorption experiments. Application of the Donnan theory, which is based on ion partitioning between two phases, indicates that the adsorption is an ion-exchange process--the bile acid anion displaces the chloride counter-ion of cholestyramine. Donnan considerations indicate that the bile acid in the resin phase exists in two forms, bound and unbound, but at higher Ceq the bound form is increasingly favoured. Since the concentrations of bound bile acid in the resin phase are above the critic

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3

Arcanjo, Maria Rosiene Antunes. "Study on the adsorption of lactic acid by ion exchange chromatography." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13346.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Currently the demand for renewable fuels has increased a lot. Thus, biodiesel is an alternative to oil and its derivatives, since its production is cheaper, there is a reduction in emissions, and is considered a renewable energy. Due to government incentives that drive the production of biodiesel, such fuel has been produced on a large scale. Of all the raw material used for producing biodiesel via transesterification, 10 % in mass is converted into glycerin, excess demand and absorption capacity of the current markets. In this c

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4

Bowley, Michael Allan. "The adsorption of colloidal material to highly porous ion-exchange resins." Master's thesis, University of Cape Town, 1985. http://hdl.handle.net/11427/23171.

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5

Löfgren, Rebecka. "Metal ion adsorption of highly mesoporous magnesium carbonate." Thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388827.

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In this project the adsorption ability of mesoporous magnesium carbonate (MMC) for copper (Cu), cobalt (Co), chromium (Cr) and arsenic (As) was evaluated. This was done by mixing MMC and dissolved metal (of different concentrations) and measuring the concentration of the solution before and after addition of MMC with Inductively coupled plasma optical emission spectroscopy. Besides MMC, “ordinary” magnesium carbonate (MgCO_3) was evaluated for comparison. Furthermore, the MMC was characterised with various instruments before and after adsorption of the metals. The adsorption experiments establ

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6

Burcher-Jones, Cody Owen. "Mineralogical and ion-exchange leaching study of a Rare Earth Element (REE) bearing ion-adsorption clay deposit." Master's thesis, Faculty of Engineering and the Built Environment, 2018. http://hdl.handle.net/11427/30161.

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Rare earth elements (REEs), La to Lu including Y, are vital elements in manufacture of catalysts and metallurgical industries, and play a critical role in meeting future energy demands, such as through their use in permanent magnets in wind turbines. China has dominated more than 90 % of the REE market, with heavy REE (HREE) clay deposits in South China accounting for 35 % of their total REE output. This has prompted the evaluation of ion-adsorption clay (IAC) deposits in tropical regions outside China, namely Madagascar. Clay minerals such as kaolinite are part of the phyllosilicate class, co

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7

Langford, John F. Jr. "Effects of adsorbent structure and adsorption on transport phenomena in ion-exchange chromatography." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 250 p, 2007. http://proquest.umi.com/pqdweb?did=1251904681&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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8

Dietrich, Theo Henry. "The removal of heavy metals from dilute aqueous streams by the use of ion exchange resins." Thesis, Cape Technikon, 1998. http://hdl.handle.net/20.500.11838/887.

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Thesis (MTech (Chemical Engineering)--Cape Technikon, Cape Town, 1998<br>Ion exchange resins are widely used to remove or concentrate heavy metals from aqueous solutions or slurries.This thesis attempts to properly evaluate the interaction between ion exchange resins and heavy metals at trace metal concentrations.The durability of the resins and their effectiveness in real slurries were also investigated. In this study, a chelating resin, as well as a cation, and anion exchange resin was contacted with aqueous solutions of heavy metals in both free and complexed form. Zinc, nickel and c

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9

Chartrand, Zachary Guy. "The Selective Ion-Exchange Removal of Ammonia from Mining Wastewater." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37543.

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The Canadian mining industry is a multi-billion-dollar effort and one of Canada’s largest industrial sectors, creating jobs and security across the country. Certain practices employed within the industry have led to great developments, while increasing productivity and reducing costs. One such practice is the use of nitrogen-based explosives, which have serious environmental repercussions, namely the introduction of large quantities of ammonia into the ecosystem through means of complex blends of wastewaters also containing various metals. These explosive impacted mining wastewaters (EIMWW), m

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10

Marinetti, Andrea. "Recovery of Carboxylic acids from anaerobic fermented broth through ionic exchange processes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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The recovery of Carboxylic acids were based on two particular objective: the study of the efficiency of a cation exchange resin, used in order to reduce the pH of the actual effluent, considering it is necessary to have a low pH for the anion exchange resin to be able to adsorb the acids from the effluent, and the preliminary studies perfomerd on the anion exchange resin, at various flow rates and both mode of operation, expanded and packed bed mode, using a simulated effluent, were the carboxylic acids were represented by just acetic acid, as the target molecule.

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11

Els, Ellis Raymond. "The adsorption characteristics of precious and base metals on four different ion-exchange resins." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51936.

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Dissertation PhD--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: Adsorption tests were conducted with four different ion-exchange resins to determine the equilibrium adsorption of a range of precious and base metals. The adsorption characteristics were determined for synthetic single metal, as well as for multicomponent and base metal solutions. The effect of the el- concentration on the equilibrium adsorption was established for three different Hel concentrations in the above solutions. From the ion-exchange characteristics determined, a selective adsorption sequence is propose

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12

Selbe, Tyler J. "Applications of aluminosilicate and zincosilicate materials: aqueous phase ion exchange and gas phase adsorption." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/7057.

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Doctor of Philosophy<br>Department of Chemical Engineering<br>Jennifer L. Anthony<br>Zeolites and zeolite-like materials have well-ordered structures and pores creating varying capacities for molecules based upon size, functional groups, polarity, and intermolecular forces making the materials useful for molecular sensing as well for molecules that are considered hazardous at very low concentrations with reproducible results because of these properties. This study will identify and characterize applications for zeolite and zeolite-like materials in gas and liquid phases based upon the dominat

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13

Ndayambaje, Guillaume. "Sorption properties of natural zeolites for the removal of ammonium and chromium ions in aqueous solution." University of the Western Cape, 2011. http://hdl.handle.net/11394/5425.

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>Magister Scientiae - MSc<br>There are huge amount of natural clinoptilolite available in South Africa which can be utilised for wastewater treatment of ammonia and chromium if their characteristics are properly known. However, these deposits have not been well characterised but in this study, the untreated clinoptilolite materials were fully characterised using techniques such as SEM-EDS, HRTEM-SAED, XRD, XRF, FTIR and BET. After acid pretreatment with several extractions, the pretreated samples were again characterised using the above mentioned techniques. These pretreated materials were us

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14

Payne, Karl A. "Mathematical and Numerical Modeling of Hybrid Adsorption and Biological Treatment Systems for Enhanced Nitrogen Removal." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7702.

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High nutrient loading into groundwater and surface water systems has deleterious impacts on the environment, such as eutrophication, decimation of fish populations, and oxygen depletion. Conventional onsite wastewater treatment systems (OWTS) and various waste streams with high ammonium (NH4+) concentrations present a challenge, due the inconsistent performance of environmental biotechnologies aimed at managing nutrients from these sources. Biological nitrogen removal (BNR) is commonly used in batch or packed-bed reactor configurations for nitrogen removal from various waste streams. In recogn

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15

Yalala, Bongani Ndhlovu. "Ion exchange resins an functional fibres :a comparative study for the treatment of brine waste water." Thesis, University of the Western Cape, 2009. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8342_1298358875.

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<p>To improve the adsorption capacity of polyacrylonitrile (PAN) fibres, hydrophilic amidoxime fibres were prepared by subsequent conversion of the cyano groups to an amidoxime group by reacting with hydroxylamine at 80&deg<br>C at an optimum amidoximation time of 2 hrs. The amidoxime fibre was hydrolyzed/alkali treated in a solution of sodium hydroxide to enhance or improve the adsorption properties. This was followed by characterization of the amidoxime and hydrolyzed fibres using Scanning electron microscopy (SEM)<br>Fourier transform Infrared Spectroscopy (FTIR) and exchange capacity (cati

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16

Zhao, Wen. "The Control of Water Contaminants Assisted by Natural Materials." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/7114.

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Natural materials can be used to remove water contaminants by applying proper physical, chemical, and biological water treatment processes. This study involves using natural materials, as they are considered to be more environmentally benign and cost-effective than synthetic materials. This dissertation concentrates on monitoring five major water quality parameters—ammonia, fluoride, turbidity, pH, and fecal indicator bacteria (FIB) —in two major applications where clean water is needed. The focus is on meeting the water quality requirements for each contaminant. The overal

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17

Kammerer, Judith [Verfasser]. "Selective Polyphenol Recovery from By-Products of Plant Foodstuff Processing by Adsorption and Ion Exchange Technology / Judith Kammerer." Aachen : Shaker, 2011. http://d-nb.info/1071529005/34.

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18

Liang, Juan [Verfasser]. "Theoretical and experimental study of single and binary components adsorption of proteins onto ion-exchange chromatographic media / Juan Liang." München : Verlag Dr. Hut, 2014. http://d-nb.info/1053859538/34.

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19

SANTOS, ELIANE E. dos. "Estudo da separacao de galio e zinco por meio de resinas trocadoras e de adsorcao de ions. Obtencao de sup67Ga para uso em medicina nuclear." reponame:Repositório Institucional do IPEN, 1995. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10426.

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Made available in DSpace on 2014-10-09T12:38:34Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:05:19Z (GMT). No. of bitstreams: 1 06051.pdf: 3741184 bytes, checksum: a75ec12829b661a213233009e5987d2a (MD5)<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Mabovu, Bonelwa. "Brine treatment using natural adsorbents." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3665_1319180742.

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The current study investigated application of natural adsorbents in brine treatment. Brines are hypersaline waters generated in power stations and mining industries rich in Mg2+, K+, Ca2+, Na+, SO4 2- , Cl- and traces of heavy metals, thus there is a need for these brines to be treated to recover potable water and remove problematic elements. Natural adsorbents have been successfully used in waste water treatment because of their high surface area and high adsorptive properties when they are conditioned with acid or base. The investigation of pH showed that natural adsorbents did not perform w

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21

De, Villiers Pieter Gabriel Retief. "The use of ion-exchange resins for the recovery of valuable species from slurries of sparingly soluble solids." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53181.

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Thesis (PhD)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: The availability of vast deposits of high-grade ore bodies are rapidly becoming something of the past in the modern mining and metallurgical scenario. Apart from the lower grade content of these ore bodies, complex mineralogy are an even greater obstacle in the recovery of valuable metal species. The development of new technology to deal with these type of ore bodies is therefore critical and worth investigating, as the world's easily exploitable high grade ore deposits are decreasing. Valuable species can be recovered

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22

Drici, Nawal. "Hydroxydes doubles lamellaires, synthèse, caractérisation et propriétés." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCD007/document.

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L’étude cinétique a permis de déterminer le temps d’équilibre atteint lors de la fixation du benzopurpurine 4B sur chaque composé, ainsi que l’ordre de la réaction et la nature du mécanisme de diffusion. Cette adsorption est favorisée par un milieu légèrement basique, et l’augmentation de la température a un effet positif sur l’amélioration des performances maximales de la fixation. L’étude des isothermes d’adsorption de ce colorant, a été établie pour déterminer l’efficacité de cette nouvelle classe d’adsorbants. Ces dernières sont de type L, et les donnés de sorption ont été traitées selon p

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23

Miriyala, Amulya. "Impact of Recirculating Nitrified Effluent on the Performance of Passive Onsite Hybrid Adsorption and Biological Treatment Systems." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7697.

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Approximately 25% of households in the U.S. treat their wastewater onsite using conventional onsite wastewater treatment systems (OWTS). These systems typically include a septic tank or a series of septic tanks followed by a soil absorption system. They effectively remove biochemical oxygen demand (BOD), total suspended solids (TSS), fats and grease but are not designed to remove significant amounts of nitrogen. High nitrogen loading to coastal and ground waters can be dangerous to aquatic life and public health. Hence, there is a need for advanced onsite wastewater treatment systems that can

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24

Morali, Nihan. "Investigation Of Zinc And Lead Removal From Aqueous Solutions Using Clinoptilolite." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12606983/index.pdf.

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Natural zeolites, especially clinoptilolite, have the ability of removing certain cations from wastewater by utilizing ion exchange and adsorption. In this study, clinoptilolite originated from Bigadi&ccedil<br>, Balikesir deposit was investigated in its natural and conditioned form for its effectiveness in removing Zn2+ and Pb2+ ions from aqueous solutions. In addition, relevant mechanisms involved in heavy metal removal by clinoptilolite were examined in this study. Throughout this work, equilibrium and kinetic studies were performed with as-received and conditioned clinoptilolite, having

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Dibello, Genny. "Studio di processi di recupero dell'ammonio da acque reflue tramite adsorbimento: materiali e strategie innovative." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21703/.

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Questo studio di tesi magistrale nasce dall’esigenza di contrastare il fenomeno dell’eutrofizzazione, accelerato dalla presenza di azoto ammoniacale (NH4+-N) nei fiumi e nei laghi. I processi biologici utilizzati per rimuovere l’ammonio dalle acque, ossidandolo a N2, sono ad alta intensità energetica e hanno difficoltà a raggiungere le concentrazioni di effluenti richieste inferiori a 1 mg∙L-1. Un obiettivo del recupero dell’ammonio è quello di trasformare questo nutriente in altri composti e fertilizzanti a partire da materiali di scarto, riducendo così significativamente la dipendenza dal pr

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Medeiros, Fabiana Oliveira de. "Adsorção e purificação da enzima beta-galactosidade de Kluyveromyces marxianus CCT 7082 através de cromatografia de troca iônica." reponame:Repositório Institucional da FURG, 2008. http://repositorio.furg.br/handle/1/3055.

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Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Engenharia e Ciência de Alimentos, Escola de Química e Alimentos, 2008.<br>Submitted by Caroline Silva (krol_bilhar@hotmail.com) on 2012-09-24T18:55:13Z No. of bitstreams: 1 dissertacao fabiana oliveira de medeiros.pdf: 1020636 bytes, checksum: 53a365d525d6cffb152a57bfa7d3872c (MD5)<br>Approved for entry into archive by Bruna Vieira(bruninha_vieira@ibest.com.br) on 2013-01-06T17:42:32Z (GMT) No. of bitstreams: 1 dissertacao fabiana oliveira de medeiros.pdf: 1020636 bytes, checksum: 53a365d525d6cffb152a57bf

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Liu, Dan. "Removal of Emerging Contaminants from Aqueous Solutions by Using Polymeric Resins." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/149804.

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Civil Engineering<br>M.S.E.<br>The emerging contaminants (ECs) such as estrogen hormones, perfluorinated compounds (PFCs), bisphenol A (BPA) and 1, 4-dioxane have been detected in natural water bodies at a noticeable level worldwide. The presence of ECs in the aquatic environment can pose potential threats to aquatic organisms as well as human world. Ion-exchange is a highly efficient technology for the removal of heavy metal ions and natural organic materials (NOMs) due to the nature of exchanging similar charged ions. However, this technology has not been explored for removing ECs. In this s

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28

Sundman, Ola. "Cation adsorption properties of substituted kraft fibres : an experimental and thermodynamic modelling study." Doctoral thesis, Umeå universitet, Kemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1891.

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Acid/base and metal ion adsorption properties have been investigated for a range of chemically modified bleached Kraft fibre materials (pulps). The studies were performed via potentiometric titrations, Flame Atomic Absorbtion (and Emission) Spectroscopy, Inductively Coupled Plasma Optical Emission Spectroscopy and Extended X-ray Absorbtion Fine Structure measurements. As a result of a chemical modification procedure, the total concentration of acidic carboxylate groups in the fibre materials ranged between 43 and 590 μmol/g. The preferable surface potential model for modelling the ionic streng

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29

Buck, Rachel Lynn. "Importance of Placement Depth in Evaluating Soil Nitrogen, Phosphorus, and Sulfur Using Ion Exchange Resin Capsules in Semi-Arid, Low Fertility Soils." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4293.

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Ion exchange resin capsules provide a possible alternative to conventional soil testing procedures. Previous studies with semi-arid, low fertility soils observed poor relationships with poorly mobile nutrients such as phosphorus (P). We propose that placement depth may improve those relationships. Our objective was to (1) determine if placement depth could improve resin capsule estimation of the bioavailability of nitrogen (N), P, and sulfur (S) and (2) to determine if resin capsules can effectively estimate S availability in semi-arid, low fertility soils. Field sites were established in Rush

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Salih, Ali Mohammed. "The purification of industrial wastewater to remove heavy metals and investigation into the use of zeolite as a remediation tool." Thesis, University of Wolverhampton, 2018. http://hdl.handle.net/2436/621859.

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Zeolites are well-known aluminosilicate minerals that have been widely used as adsorbents in separation, purification processes and environmental pollution control. Zeolites are used in various industrial applications due to their high cation-exchange ability, molecular sieve and cataltic properties. In order to reduce the costs of acquisition and minimise the disposal of adsorbents, both modified natural zeolite and synthetic zeolite (derived from kaolinite) were used for the purification of wastewater. The characteristic properties and applications of adsorbents are also discussed including

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31

Riani, Josiane Costa. "Utilização de resinas de troca-iônica em efluentes de galvanoplastia." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-30092008-151250/.

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A crescente industrialização acompanhada do uso de metais pesados nos processos industriais nas últimas décadas resultou num aumento da contaminação do meio ambiente, principalmente em ambientes aquáticos. Assim, sendo a água um recurso natural de suma importância para a vida, métodos de tratamento de efluentes tornam-se indispensáveis para empresas geradoras de efluentes. O objetivo desse trabalho é a utilização de um sistema de troca iônica constituído por micro-colunas de resinas catiônicas e aniônicas para adsorção de metais pesados de soluções industriais, visando à recirculação de água d

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Fields, Marilyn A. "Development of nitroguanidine wastewater treatment technologies." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/74516.

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Nitroguanidine (NQ) is a nitramine used in many propellant formulations. The purpose of this study was to develop a method for treating nitroguanidine process wastewaters. The major wastewater contaminants were found to be nitroguanidine and guanidine nitrate (GN) (an intermediate product). Pilot tests were conducted for the removal of nitroguanidine using granulated carbon adsorption (GAC) and ion exchange for the removal of GN. The nitroguanidine concentration in demonstration plant wastewater was reduced from 15.5 mg/L to less than 1 mg/L. The carbon capacity was found to be 0.045 g NQ/g ca

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Gédéon, Antoine. "Contribution a l'etude par rmn (**(1)h et **(129)xe) des zeolithes my (m = na**(+), ni**(2+), cu**(2+) et co**(2+)) : adsorption d'eau et d'ammoniac." Paris 6, 1987. http://www.theses.fr/1987PA066390.

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L'application de la rmn **(129)xe permet de suivre l'evolution du libre parcours moyen du xenon adsorbe utilise comme sonde en fonction de la concentration en eau d'une zeolite nay. De plus, l'adsorption de l'ammoniac sur la zeolite y modifiee par echange de cations metalliques, a montre que la rmn-**(1)h permet de suivre la reconstitution des complexes ammoniaques en fonction de la temperature de pretraitement du solide et de la concentration en nh::(3) adsorbe ou desorbe

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Westergren, Robin. "Arsenic removal using biosorption with Chitosan : Evaluating the extraction and adsorption performance of Chitosan from shrimp shell waste." Thesis, KTH, Chemistry, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4642.

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<p>Nicaragua is a country in which the toxic metal contamination of freshwater resources has become an increasingly important problem in certain regions posing a threat to the environment as well as to human health. Among the metals found in the waters of Nicaragua, arsenic is one of the most problematic since its long time consumption is connected to serious health problems such as cancer and neurological disorders. The arsenic contamination of water recourses in Nicaragua is mostly attributable natural factors, even though anthropogenic activities including gold mining may be a contributing

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Al-Nasri, Salam Khudhair Abdullah. "Treatment of wastewater containing cobalt (Co-59) and strontium (Sr-89) as a model to remove radioactive Co-60 and Sr-90 using hierarchical structures incorporating zeolites." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/treatment-of-wastewater-containing-cobalt-co59-and-strontium-sr89-as-a-model-to-remove-radioactive-co60-and-sr90-using-hierarchical-structures-incorporating-zeolitesa(ff5cff3e-1366-4a35-9b15-0246811d6ad1).html.

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Zeolites were used in this study to remove two types of non-radioactive ions (Cobalt-59 and Strontium-89) from wastewater. This was designed to model the use of ion-exchange technique to remove radioactive Co-60 and Sr-90 from low level wastewater from Al-Tuwaitha site. Al-Tuwaitha site is a nuclear research in Iraq was used for radio-medical and radio-chemical purposes before 1990. In this study, hierarchical microporous/macroporous structures were developed to overcome the diffusivity problem using zeolite. Diatomite and carbon were used to prepare the composite adsorbents by incorporating t

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Rodriguez-Gonzalez, Laura C. "Advanced Treatment Technologies for Mitigation of Nitrogen and Off-flavor Compounds in Onsite Wastewater Treatment and Recirculating Aquaculture Systems." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6941.

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Non-point sources (NPS) of pollution are non-discernable, diffuse sources of pollution that are often difficult to localize and in turn mitigate. NPS can include stormwater runoff, agricultural/aquaculture wastes and wastes from small decentralized wastewater treatment systems, such as conventional septic systems. The mitigation of these NPS is imperative to reduce their potential detrimental effects on the water environment. This dissertation addresses novel treatment technologies for the mitigation of nutrients, particularly nitrogen, in Recirculating Aquaculture Systems (RAS) and onsite was

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Shields, Anthony J. "UNDERSTANDING AND MODELING THE SORPTION ON ANION EXCHANGE RESINS USING POLY-PARAMETER LINEAR FREE-ENERGY RELATIONSHIPS AND PHASE CONVERSION." Master's thesis, Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/217867.

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Civil Engineering<br>M.S.Env.E.<br>Priority organic and emerging contaminants are a growing concern for drinking water treatment due to their increasing presence in the environment. This study developed a predictive model for the sorption of anionic organic contaminants from drinking water on three anion exchange resins: a strong polystyrenic (IRA-910), weak polystyrenic (IRA-96), and a strong polacrylic (A860). The model quantifies the individual mechanisms of sorption using poly-parameter linear free energy relationships (pp-LFERs) and the feasibility of phase conversion (e.g., an ideal gas

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Megersa, Daniel. "Evaluation of sorption behavior of two reactive filter materials using dual column laboratory investigation." Thesis, KTH, Mark- och vattenteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-180281.

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Phosphorous and nitrogen are vital elements for the well-being of biological life. Industrial discharges, waste water infiltration systems, conventional waste water collection and treatment systems, agricultural runoffs and landfill leachates had been emitting significant quantity of these nutrients into water bodies. These induced negative consequences to the environment including eutrophication of aquatic water bodies, toxicity to marine life and depletion of phosphate resources. Reactive filter technology is developed based on the need to remove and retain nutrients from waste water while i

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39

Deboni, Taiana Maria 1986. "Desacidificação de óleo de soja por resina de troca iônica." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254989.

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Orientador: Antonio José de Almeida Meirelles<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-19T16:22:26Z (GMT). No. of bitstreams: 1 Deboni_TaianaMaria_M.pdf: 3340128 bytes, checksum: 2c048258852d2e09abea9ae1b84c123e (MD5) Previous issue date: 2012<br>Resumo: Um método alternativo para a remoção de ácidos graxos livres presentes em óleos vegetais brutos se baseia no uso de resinas de troca iônica. Este método mostra-se adequado e vantajoso, devido às condições brandas de processamento, provável minim

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Palli, Amar D. "Heteroatom removal from nonaqueous systems by sorption processes a comparative study of kinetic models." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179950186.

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Ferreira, Marcionila de Oliveira. "Purifica??o da glicerina bruta obtida a partir da transesterifica??o do ?leo de algod?o." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15767.

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Made available in DSpace on 2014-12-17T15:01:18Z (GMT). No. of bitstreams: 1 MarcionilaOF.pdf: 1821227 bytes, checksum: 7929f8f8aee297af940f4df074b1c3bb (MD5) Previous issue date: 2009-03-05<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The crude glycerine is a raw material that can be used in a wide variety of products. Even with all the impurities inherent in the process of being obtained, the crude glycerin is already in a marketable product. However, the market is much more favorable to the commercialization of purified glycerine. The glycerin

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Thach, Ut Dong. "Echanges d’anions sur ionosilices : de l'élaboration des matériaux aux études physicochimiques et leurs applications en séparation et catalyse." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT239/document.

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L'objectif de cette thèse est le développement de nouveaux échangeurs d'anions à base d’ionosilices. Différents matériaux contenant des entités ammoniums ont été synthétisés par la procédure d'hydrolyse-polycondensation à partir de précurseurs silylés d'ammonium. Ces solides, présentant différentes textures, différentes architectures ou des morphologies ont été obtenus en faisant varier des paramètres de réaction, comme par exemple la nature du tensioactif utilisé. Outre les caractérisations structurales et texturales (adsorption-désorption d’azote, DRX, MET / MEB), nous nous sommes concentrés

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Iglesias, Juncà Mònica. "Utilització de suports polimèrics en processos de separació de metalls valuosos. Aplicacions hidrometal.lúrgiques i analítiques." Doctoral thesis, Universitat de Girona, 2000. http://hdl.handle.net/10803/96340.

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The present study focuses on the characterization of solid-liquid extraction techniques for the separation and preconcentration of rare-earth elements and precious metals. We developed an impregnated resin with di (2-ethylhexyl)phosphoric acid (D2EHPA) in order to separate rare-earth elements<br>Els treballs realitzats es centren en la caracterització de sistemes d’extracció sòlid-líquid per a la separació i preconcentració de terres rares i metalls preciosos. Amb aquest objectiu es varen avaluar diferents resines quelants, majoritàriament disponibles comercialment, per a la separació i recupe

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SORDO, FILHO GIOVANNI del. "Estudo da adsorção de íons metálicos em caulinita para água de reuso." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26394.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-06-22T14:16:56Z No. of bitstreams: 0<br>Made available in DSpace on 2016-06-22T14:16:56Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado em Tecnologia Nuclear)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Ben, Abda Maher. "Etude de l'adsorption spécifique des isomères de dioxine sur des matériaux microporeux pour la mesure en ligne à l'émission des sources fixes." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4309/document.

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Les dioxines/furanes sont des polluants organiques persistants générés principalement par l’activité anthropique et spécifiquement par l’industrie lors des procédés de combustion mettant en jeux des matières organochlorées. Etant donné leur transport à large échelle dans l'environnement et leur impact sur la santé de l’homme, il est nécessaire de contrôler en temps réel, les traces de dioxines à l'émission des sources fixes. Un tel contrôle est plus particulièrement requis lors de l’incinération de déchets hétérogènes non préalablement triés. Deux types de matériaux microporeux ont été sélecti

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46

Silva, Francisco das Chagas Beserra da. "Estudo da mistura comercial dolomita-quartzo, dopada com Hg(I), Cd(II) e Cr(III), para adsor??o de H2S." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17715.

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Made available in DSpace on 2014-12-17T15:42:08Z (GMT). No. of bitstreams: 1 FranciscoCBS_DISSERT.pdf: 2327685 bytes, checksum: 7ea91ee570c997cb17e15b80242eeaa3 (MD5) Previous issue date: 2013-07-30<br>The present work was to carry out a study on the adsorption of hydrogen sulfide (H2S) in arrays synthesized from a commercial clay mineral formed by a mixture of dolomite and quartz. To produce the ion exchange matrix were made using aqueous solutions of salts of cobalt II chloride hexahydrate (CoCl2.6H2O) II cadmium nitrate tetrahydrate (Cd (NO3)2.4H2O) I mercuric chloride (HgCl) nitrate and

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Batista, Luiz Carlos Domingos. "Aplica??o de argila branca comercial pura e modificada para adsor??o de sulfeto de hidrog?nio." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17677.

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Made available in DSpace on 2014-12-17T15:42:01Z (GMT). No. of bitstreams: 1 LuizCDB_DISSERT.pdf: 2635764 bytes, checksum: a9af996a27546dc8a59f234cdabe7aad (MD5) Previous issue date: 2012-12-14<br>In this work were synthesized matrix-based commercial white clay in its composition having large amounts of kaolinite and quartz, with a certain percentage of iron oxide for use as an adsorbent for hydrogen sulfide (H2S). To characterize the effect of initial matrix techniques were used to characterize XRD, FTIR, XRF and TG. The initial clay mineral matrix was placed in contact with 0.1 molar solut

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Simões, Fernanda Borba. "Efeito da radiação micro-ondas na interação da prata com nanocristais de hidroxiapatita." Pós-Graduação em Ciência e Engenharia de Materiais, 2018. http://ri.ufs.br/jspui/handle/riufs/8013.

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The aim of this work was to evaluate the effect of microwave heating on the insertion of Ag+ ions in hydroxyapatite (HA) nanocrystals ion exchange. Assynthesized HA nanocrystals obtained by the precipitation method in aqueous medium were immersed in an Ag+-containing solution (0.1 mol L-1) and heated in a microwave oven at 100°C/15 min under a power of 800 W. The nanocrystals were also heated in an oil bath at 80°C/4 h. To isolate the effect of the heating sources from the Ag+ ions, the HA nanocrystals were also heated in aqueous solution without Ag+ ions. All the assays were characteri

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49

Monaco, Enzo. "pH Transients in Hydroxyapatite chromatography columns." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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Ceramic Hydroxyapatite (CHT), with empirical formula (Ca5(PO4)3OH)2, is a material used as ion exchange resin in chromatographic applications. The material, having both positive and negative charged sites, can be used in many different contexts encountered in the protein purification processes. Nevertheless, the resin shows an intrinsic limitation for this kind of applications: even if the material solubility in water is very low at pH values higher than 6.5, it sharply increases in more acidic environments, reducing the life of the material and increasing the operative costs of the process, m

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50

Cren, Erika Cristina. "Processamento de soluções graxas em resina de troca ionica." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254733.

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Orientador: Antonio Jose de Almeida Meirelles<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-12T23:48:24Z (GMT). No. of bitstreams: 1 Cren_ErikaCristina_D.pdf: 3396631 bytes, checksum: 2aba05c13e0a564804083d131df53687 (MD5) Previous issue date: 2009<br>Resumo: Alguns óleos vegetais são sensíveis às condições drásticas do processo de refino, físico ou químico, podendo assim apresentar problemas quando submetidos a estes processos, tais como perda de substâncias desejáveis, como os compostos nutracêuticos, es

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