Made available in DSpace on 2015-03-04T18:51:13Z (GMT). No. of bitstreams: 1 thesisRosa.pdf: 2324244 bytes, checksum: e7604311281924e9c68f2886457323e8 (MD5) Previous issue date: 2009-01-10 / Conselho Nacional de Desenvolvimento Cientifico e Tecnologico / In the context of the stochastic perturbations theories we analyze the accuracy of two linear poroelastic models applied to highly heterogeneous porous media subject to uncertainties in the permeability and the elastic constants. The poroelastic models completely and weakly coupled analized arise characterized by the degree of intensity coupling between the hydrodinamics, governor of the percolation of the fluid and poromechanics which governs the deformation of the porous matrix. New equations for the moments of effective solutions using techniques of asymptotic expansion. In light of the perturbation theory are set simplifying assumptions that clarify clearly the domain of validity of weakly coupled model, widely used in simulation of oil reservoirs in the presence of heterogeneities and correlation in poroelastic coefficients. Computational simulations of the primary extraction of oil process are carried out using Monte Carlo techniques in conjunction with finite element methods. Results obtained clearly confirm the conjecture established by the perturbation theorie related with the inaccuracy of the weakly coupled model in the presence of variability in the elastic constants. The methodology used allows to quantify the distance between the two poroelastics models and therefore propose the appropriate model for different conditions of loading and variability of the geological formation. / No contexto das teorias de perturbação estocástica, analisamos a acurácia de dois modelos poroelásticos lineares aplicados a meios porosos altamente heterogêneos sujeitos as incertezas na permeabilidade e nas constantes elásticas. Os modelos poroelásticos completamente e fracamente acoplados analisados surgem caracterizados pelo grau de intensidade de acoplamento entre a hidrodinámica governante da percolação o do fluido e a poromecânica que rege as deformações da matriz porosa. Novas equações efetivas para os momentos das soluções são obtidas fazendo uso de técnicas de expansão assintótica. À luz da teoria de perturbação, são estabelecidas hipóteses simplificadoras que elucidam o domínio de validade do modelo fracamente acoplado, amplamente utilizado nos simuladores de Reservatórios de Petróleo, na presença de heterogeneidades e correlação nos coeficientes poroelásticos. Simulações computacionais do processo de extração primária de petróleo são realizadas utilizando técnicas de Monte Carlo em conjunção com métodos de elementos finitos. Resultados numéricos obtidos confirmam pela teoria de perturbação relacionada com a inacurácia do modelo fracamente acoplado na presença de variabilidade nas constantes elásticas. A metodologia empregada permite quantificar a distância entre os dois modelos poroelásticos, e consequentemente, propor a escolha do modelo apropriado para diferentes condições de carregamento e variabilidade da formação geológica.

Made available in DSpace on 2015-03-04T18:57:39Z (GMT). No. of bitstreams: 1 RochaMSc2012.pdf: 6009136 bytes, checksum: ff02334f6689f3a9934cb90d26026eda (MD5) Previous issue date: 2013-02-05 / Conselho Nacional de Desenvolvimento Cientifico e Tecnologico / A new two-scale computational model is constructed for swelling porous media. The model, based on the homogenization technique is applied to the nanoscopic governing equations of the electro-chemo-mechanical coupling that arises when the charged solid matrix is saturated by an electrolyte solutions containing cations and anions. The non-local pore-scale model is constructed within the framework of Statistical Mechanics and leads to a Fredholm integral equation of second type for the ion-particle correlation function coupled with Poisson problem for the electric potential. When combined with the fluid equilibrium condition such problem gives rise to a constitutive law for the fluid stress tensor in terms of the disjoining pressure which dictates the swelling of the porous medium. The homogenization procedure, based on formal asymptotic expansions, is applied to up-scale the model to the macroscale leading to a two-scale constitutive law for the swelling pressure appearing in the modified effective stress principle. Within the framework of Statistical Mechanics the two-scale model is capable of capturing the deviations from the classical Gouy-Chapman Poisson-Boltzmann-based theory (which treat the ions as point charges) induced by the finite size short-range ion-ion correlations effects due to the treatment of the ions as charged hard spheres with charge located at their center. Numerical solutions of the integro-differential problem posed in a periodic cell are constructed making use of a sequential algorithm which consists of delaying the terms independent of the electric potential in the Poisson equation. Application of this technique give rise to two problems, the first being a non-linear Poisson problem, discretized by Galerkin's method and the second consisting of integral equations for the correlation functions. These in turn are discretized by the Collocation method taking as basis functions the eigenfunctions related to their respective kernels. With this choice of basic functions, each integral equation reduces to an algebraic equation. In this context we are faced with two new problems. The first consists of the integral eigenvalue problems concerning the kernels, discretized by Galerkin's method and the second a system of nonlinear equations for the coefficients of expansions of the unknowns. Numerical results for the correlation functions and electric potential are obtained for two-dimension and stratified arrangements of the macromolecules. Continuing in the stratified arrangements results for the swelling pressure are obtained showing that the effects of ion-ion correlation forces give rise to anomalous attraction patterns between the particles for divalent ions. Such class of attractive adverse phenomena lead to new reactive transport regimes of contaminants in swelling media due to the anomalous adsorption/desorption of the ionic species coupled with clay swelling. / Neste trabalho construímos um novo modelo computacional em duas escalas de meios porosos expansivos (argila, polímeros, tecidos biológicos) advindo do processo de homogeneização das equacões postas na escala dos nano-poros governantes do acoplamento eletro-químico-mecânico quando a matriz porosa, carregada negativamente na superfície do sólido, é saturada por uma solução eletrolítica composta por cátions e ânions. O modelo não local construído na escala dos nano-poros é baseado na Mecânica Estatística e conduz a uma equação efetiva integral de Fredholm de segunda espécie para a função de correlação íon-partícula acoplada com o problema de Poisson para o potencial elétrico. Quando combinado com a condição de equilíbrio no fluido, tal problema eletro-químico dá origem à uma lei constitutiva para o tensor de tensões do fluido formulada em termos da pressão de disjunção governante do inchamento do meio poroso. O processo de homogeneização baseado em expansões assintóticas é utilizado na macroscopização do modelo levando à uma lei constitutiva em duas escalas para a pressão de disjunção que surge no princípio das tensões efetivas modificado e cuja magnitude governa a expansão do meio poroso. No contexto da Mecânica Estatística, o modelo em duas escalas é capaz de capturar desvios em relação a teoria clássica de Gouy-Chapman Poisson-Boltzmann (que trata os íons como cargas pontuais) induzidos pelos efeitos das correlações de curto alcance íon-íon devido ao tratamento destes como esferas duras com carga elétrica localizada no centro de cada esfera. Soluções numéricas do problema integro-diferencial posto na célula periódica são construídas fazendo uso de um algoritmo sequencial que consiste em atrasar os termos independentes do potencial elétrico na equação de Poisson. A aplicação desta técnica dá origem a dois problemas, sendo o primeiro um problema de Poisson não linear, discretizado pelo método de Galerkin e o segundo que consiste nas equações integrais para as funções de correlação. Estas por sua vez são discretizadas pelo método da Colocação tomando como funções base as autofunções relacionadas aos seus respectivos núcleos. Com esta escolha das funções de base, cada equação integral naturalmente se reduz a uma equação algébrica. Neste contexto construímos dois novos problemas. O primeiro consiste nos problemas integrais de autovalores para os autopares relativos aos núcleos, discretizados pelo método de Galerkin e o segundo um sistema de equações não lineares para os coeficientes das expansões das incógnitas. Resultados numéricos para as funções de correlacão e potencial elétrico são apresentados para arranjos bidimensionais e estratificados de macromoléculas. Ainda nos arranjos estratificados resultados para a pressão de disjunção são obtidos mostrando que efeitos das correlações íon-íon estão associados a perfis anômalos de atração entre as partículas para íons bivalentes. Tal classe de fenômenos atrativos adversos dá origem a novos regimes de transporte reativo de contaminantes em solos argilosos expansivos devido ao surgimento do processo anômalo de adsorção/dessorção do poluente acoplado ao inchamento da argila.

Made available in DSpace on 2015-03-04T18:57:59Z (GMT). No. of bitstreams: 1 dissertacao.pdf: 2728107 bytes, checksum: 5610abd36ff0ae1a434586b6ee7bafda (MD5) Previous issue date: 2013-12-20 / In this work we propose an extension of the technique of discontinuities embedded in finite elements, firstly proposed in the context of Solid Mechanics, to the scenario of hydromechanical coupling in petroleum reservoirs within the framework of the iterative coupled formulation. Considering a poroelastic reservoir fully-saturated by a single incompressible fluid containing geological faults, we introduce additional degrees of freedom associated with the jumps in displacement and pore pressure in the vicinity of the fault, which arises from the homogenization of the microscopic problem perturbed by the parameter $varepsilon=H/L$, where $H$ and $L$ denote the fault width and a characteristic length of the reservoir. In the asymptotic limit $varepsilon o 0$ the jumps are resolved through the enforcement of continuity of the normal components of total stress and Darcy velocity in the vicinity of the fault. Making use of such restrictions at collocation points in the elements that intersect the discontinuity we adopt a static condensation procedure to eliminate the degrees of freedom of the jumps, leading to a problem solely posed in terms of the regular parts of the poromechanical fields giving rise to perturbed stiffness and mass matrices. The resultant numerical modeling is applied to numerically simulating fluid injection problems in reservoirs coupled in the geomechanical sense with impermeable cap rocks. The numerical simulations provide insight into possible scenarios to predict the onset of fault activation. Examples characterized by possible scenarios of fault activation are discussed in the case of the Brazilian pre-salt geological formations. / Este trabalho propõe a extensão do método de descontinuidade embebida no elemento, inicialmente proposto em Mecânica dos Sólidos na presença de descontinuidades fortes (falhas), para o cenário do acoplamento hidrogeomecânico em reservatórios de petróleo no contexto da formulação iterativamente acoplada. Considerando a rocha produtora poroelástica saturada por um fluido incompressível cortada pela presença de falhas geológicas seladas, introduzimos graus de liberdade adicionais associados aos saltos dos campos de deslocamento e poro-pressão ao longo da falha, os quais são advindos da homogeneização do problema microsc ópico perturbado pelo parâmetro " = H=L, onde H denota a largura da falha e L um comprimento característico do reservatório. No limite assintótico " ! 0 os saltos são resolvidos através da imposição da continuidade das componentes normais da tensão total e da velocidade de Darcy na vizinhança da descontinuidade. Fazendo uso desta restrição em pontos de colocação ao longo dos elementos cortados pela falha, adotamos o procedimento de condensação estática e eliminamos os graus de liberdade dos saltos, dando origem a um problema formulado puramente em termos das partes regulares dos campos poromecânicos porém com matrizes de rigidez e massa perturbadas. O modelo numérico resultante é aplicado à simulação do problema de injeção de fluidos em reservatórios acoplados geomecanicamente com rochas capeadoras impermeáveis, com objetivo de previsão de possíveis cenários de início do processo de reativação de falhas. São discutidos exemplos caracterizados por possível ativação no caso do pré-sal brasileiro.

This work describes a novel technique to prepare ultra-thin composite Pd-porous metal membranes for H2 separation. This novel technique consists of the gradual smoothing of the Porous Metal (PM) support's surface with several layers of pre-activated alumina particles of different sizes. The deposition of coarse, fine and ultra-fine alumina particles resulted in the narrowing of the PM' surface pore size distribution. The excellent surface smoothness achieved after the grading of the PM 's surface support allowed for the preparation of gas tight Pd layers as thin as 5.6?m. The Pd layers were extremely uniform due to the presence of the grade layer and strongly attached to the support. Composite Pd membranes prepared on graded supports showed H2 permeance as high as 50 m3/(m2 h bar0.5) at 500ºC and ideal selectivities (H2/He) as high as 27000. Moreover, the H2 permeance and ideal selectivity were stable over 1100 hours at 500ºC in H2 atmosphere. Composite Pd-Cu membranes showed H2 permeance as high as 30 m3/(m2 h bar0.5) at 450ºC and ideal selectivities (H2/He) as high as 900. The H2 permeance and ideal selectivity of Pd-Cu membranes were stable over 500 hours at 450ºC in H2 atmosphere. The outstanding long-term H2 permeance and ideal selectivity stability of all composite Pd and Pd-Cu membranes represented a breakthrough in composite Pd membrane synthesis. The thermal stresses arising from the mismatch in the coefficient of thermal expansion between the Pd film and the support were determined by means of x-ray diffraction. The results indicated that the release of stresses began to occur at temperatures close to 400ºC. Also, the release of stresses took place with a visible sintering of Pd clusters within the thin Pd film. The stresses due to the absorption of H2 were also studied and modeled. It was estimated that the maximum compressive stress under which these composite Pd membranes were characterized was equal to 260 MPa.

"Water behavior in pure silicalite and Dealuminated Zeolite Y (DAY), two highly hydrophobic zeolites, was investigated at different temperatures in the range 100-600 K by molecular dynamics simulations. The Compass forcefield was used to carry out the study. A full flexibility of water molecules and of the zeolite framework was considered. The results show that water behavior is more complex in silicalite than in zeolite DAY. Three different activation energies for water diffusion were obtained in silicalite in the range 250-600 K compared to two for DAY. The values of these activation energies are discussed in detail and are related to the hydrogen bond‘s strength and the zeolite structure. Moreover, from the radial distribution functions (rdfs), it is shown that water mostly exists in the gas phase at room temperature in silicalite whereas liquid water is observed in DAY in agreement with previous experimental observations. The self-diffusion coefficients of water and the rdfs are obtained as a function of temperature in order to explain the behavior differences of water in the two all-silica zeolites. The loading influence on the self-diffusion coefficients is also investigated for both crystals. The results are compared with previous experimental and theoretical studies."

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1979. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND AERONAUTICS. / Vita. / Includes bibliographical references. / Ph.D.

Ho Chun Man. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references. / Abstracts in English and Chinese. / ABSTRACT --- p.iv / DECLARATION --- p.vi / ACKNOWLEDGEMENT --- p.vii / TABLE OF CONTENTS --- p.viii / LIST OF TABLES --- p.xi / LIST OF FIGURES --- p.xii / Chapter Chapter One: --- Introduction --- p.1 / Chapter 1.1 --- Overview --- p.1 / Chapter 1.2 --- Fundamental of CeO2 --- p.2 / Chapter 1.3.1 --- Synthesis and Modification of Ceria-based Materials --- p.5 / Chapter 1.3.1 --- Synthetic Method --- p.5 / Chapter 1.3.2 --- "Mesoporous Structure of Ce02, CexZr1-x02" --- p.6 / Chapter 1.3.3 --- Doped Ce02 Materials --- p.6 / Chapter 1.3.4 --- Fabrication of Ceria and Cerium-based Nanoparticles --- p.7 / Chapter 1.4 --- Scope of work --- p.8 / Chapter 1.5 --- References --- p.11 / Chapter Chapter Two: --- Meso- and Macro-porous Pd/CexZr1-x02 as Carbon Monoxide Oxidation Catalysts --- p.16 / Chapter 2.1 --- Introduction --- p.16 / Chapter 2.2 --- Experimental Section --- p.18 / Chapter 2.2.1 --- Sample Preparation - Synthesis of the Catalyst Support --- p.18 / Chapter 2.2.2 --- Addition of Pd to the Catalyst Support --- p.19 / Chapter 2.2.3 --- Characterization --- p.20 / Chapter 2.2.4 --- Carbon monoxide oxidation measurement --- p.21 / Chapter 2.3 --- Results and Discussion --- p.22 / Chapter 2.3.1 --- XRD analysis --- p.22 / Chapter 2.3.2 --- SEM and TEM --- p.25 / Chapter 2.3.3 --- N2-Soprtion --- p.32 / Chapter 2.3.4 --- X-ray Photoelectron Spectroscopy --- p.40 / Chapter 2.3.5 --- Thermal Catalysis Study --- p.45 / Chapter 2.4 --- Conclusion --- p.52 / Chapter 2.5 --- References --- p.54 / Chapter Chapter Three: --- Morphology-Controllable Synthesis of Ce02 Nano and Meso-structures --- p.60 / Chapter 3.1 --- Introduction --- p.60 / Chapter 3.2 --- Experimental Section --- p.62 / Chapter 3.2.1 --- Materials and Experimental Conditions --- p.62 / Chapter 3.2.2 --- Characterization --- p.64 / Chapter 3.3 --- Results and Discussion --- p.67 / Chapter 3.3.1 --- SEM and TEM Analysis --- p.67 / Chapter 3.3.2 --- XRD Analysis --- p.75 / Chapter 3.3.3 --- N2-Soprtion --- p.78 / Chapter 3.3.4 --- X-ray Photoelectron Spectroscopy --- p.84 / Chapter 3.3.5 --- FT-IR Analysis --- p.87 / Chapter 3.3.6 --- GC-MS Analysis --- p.89 / Chapter 3.3.7 --- Proposed Formation of Ce02 nanospheres and their transformation to microrods --- p.95 / Chapter 3.3.8 --- UV absorption spectra and band gap energies --- p.97 / Chapter 3.3.9 --- Thermal Catalysis Study --- p.100 / Chapter 3.4 --- Conclusion --- p.103 / Chapter 3.5 --- References --- p.105 / Chapter Chapter Four: --- Conclusion --- p.110 / LIST OF PUBLICATIONS --- p.112

Zhang Lizhi. / "July 2003." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

Made available in DSpace on 2014-12-17T15:41:42Z (GMT). No. of bitstreams: 1 ArilsonJNS.pdf: 3626777 bytes, checksum: 66cf6233a47c3a2d53f0c71191f75125 (MD5) Previous issue date: 2007-11-12 / Heterogeneous catalysts such as aluminophosphate and silicoaluminophosphate, molecular sieves with AEL of ALPO-11 and SAPO-11, were synthesized by the hydrothermal method with the following molar composition: 2.9 Al +3.2 P + 3.5 DIPA +32.5 H20 (ALPO-11); 2.9 Al +3.2 P + 0.5 Si + 3.5 DIPA +32.5 H20 (SAPO-11) starting from silica (only in the SAPO-11), pseudoboehmite, orthophosphoric acid (85%) and water, in the presence of a di-isopropylamine organic template. The crystallization process occurred when the reactive hydrogel was charged into a vessel and autoclaved at 170?C for a period of 48 hours under autogeneous pressure. The obtained materials were washed, dried and calcined to remove the molecular sieves of DIPA. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), thermo gravimetric differential thermal analysis (TG/DTA) and nitrogen adsorption (BET). The acidic properties were determined using adsorption of n-butylamine followed by programmed thermodessorption. This method revealed that ALPO-11 has weaker acid sites due to structural defects, while SAPO-11 shows an acidity that ranges from weak to moderate. However, a small quantity of strong acid sites could be detected there. The deactivation of the catalysts was conducted by the cracking of the n-hexane in a fixed bed continuous flow microrreator coupled on line to a gas chromatograph. The main products obtained were: ethane, propane, isobutene, n-butane, n-pentane and isopentane. The Vyazovkin (model-free) kinetics method was used to determine the regeneration and removal of the organic template / Foram sintetizados catalisadores heterog?neos do tipo aluminofosfatos e silicoaluminofosfatos pelo m?todo hidrot?rmico a partir de alumina hidratada (pseudobohemita), ?cido fosf?rico 85%, s?lica gel, ?gua e diisopropilamina (DIPA) usada como direcionador estrutural org?nico. Estes reagentes foram misturados a fim de obter g?is com as seguintes composi??es: 2.9 Al +3.2 P + 3.5 DIPA +32.5 H20; para ALPO e 2.9 Al +3.2 P + 0.5 Si + 3.5 DIPA +32.5 H20 para SAPO. O processo de cristaliza??o ocorreu ? temperatura de 170 0C durante 48 h, quando foi poss?vel obter as fases puras para ALPO 11 e SAPO 11. Os materiais obtidos foram lavados com ?gua deionizada, secos e calcinados para remover as mol?culas do direcionador. Os materiais foram caracterizados por difra??o de raios-X (DRX), microscopia eletr?nica de varredura (MEV), espectroscopia de absor??o na regi?o do infravermelho (FTIR), an?lise t?rmica via TG/DTG e adsor??o de nitrog?nio (BET). As propriedades ?cidas foram determinadas usando adsor??o de n-butilamina seguida de termodessor??o programada. Este m?todo revelou que o ALPO 11 possuem s?tios ?cidos fracos devido a defeitos estruturais, j? a amostra SAPO 11 apresenta uma acidez tipicamente fraca a moderada. Entretanto, uma pequena quantidade de s?tios ?cidos fortes foi detectada. A desativa??o dos catalisadores foi conduzida pela rea??o de craqueamento do n-hexano em um microrreator catal?tico de leito fixo com fluxo cont?nuo acoplado em linha com um cromat?grafo a g?s. Como principais produtos foram obtidos: etano, propano, isobutano, n-butano,e n-pentano, isopentano. Para determinar a regenera??o e a remo??o do direcionador org?nico foi aplicado o m?todo cin?tico Vyazovkin (Model Free)

O tratamento por técnicas eletroquímicas é provavelmente uma das metodologias mais prometedoras na descontaminação de sistemas particulados, sendo capaz da remoção, total ou parcial, de contaminantes como metais pesados, radionuclídeos, orgânicos e inorgânicos. Pelo uso de uma diferença de potencial elétrico em correntes baixas aplicadas através de pares de eletrodos, os contaminantes são movidos sob a ação do campo elétrico. A extração de impurezas pelo método eletrocinético é baseada na suposição que as moléculas estejam ou sejam evoluídos para a fase liquida. O ciclo completo envolve a adsorção, o transporte, a captação, e a remoção do contaminante dos meios porosos. Neste trabalho avaliou-se o emprego da técnica de eletroosmose na remoção de fenol em meios líquidos e porosos. O fenol foi escolhido por ser um composto altamente tóxico, proveniente de refinarias de óleos, industrias de tintas e principalmente pesticidas. Para a validação do processo em escala de laboratório, foi confeccionada uma célula eletroquímica para um volume de 700 cm3, com eletrodos de titânio. A concentração de fenol utilizada para este experimento foi constante de 11 mM. Água destilada, areia, pós de vidro e solo foram classificados, caracterizados e selecionados como meios porosos experimentais. As aplicações das cargas variaram de O a 120-140-240 minutos, sendo que o mapeamento do pH indicou eletromigração de espécies em todos os sistemas. Na eletroosmose temos o arraste das moléculas de fenol em direção ao catodo simultâneo à eletrólise da água, cujas concentrações relativas de contaminante foram avaliadas por espectroscopia de UV-Vis. A montagem dispõe de um reservatório para coleta de produtos de reação em cada eletrodo sendo possível a remoção do íon fenólico migrado. O processo apresentou eficiências variando de 40% a 60% na extração, dependendo das características do meio poroso. De um modo geral a técnica apresentou-se ecologicamente viável e econômica, como procedimento de remediação de solos e sistemas particulados diversos. / The use of electrochemical techniques is probably one of most promising technology for particulate system decontamination treatments. This methodology appears as able to remove heavy metals, radionucletides and organic and inorganic contaminations. By using an electric potential difference with low currents intensities through electrodes, the contaminants in the porous medium are dragged under electric field action. The contaminant removal is base on the supposition that the impurities are in solution or elute to the liquid phase. The whole cycle involves adsorption, transport, collection and removal of contaminants from the medium. In this work it was studied the use of the electroosmosis technique for removal of phenol from porous and aqueous medium. Phenol was chose because of its high toxicity and the regularly use in oil refineries, ink industries and pesticides. To validate the process, in laboratorial scale, an electrochemical cell of 700 cm3 volume, with titanium electrodes was constructed. The phenol concentration was 11 mM. Distillated water, sand, glass powder and sample of soil were classified, characterized and selected to constitute the porous media. The charge application time varied from 120 to 140 to 240 minutes and the pH mapping showed migration effect in ali of the systems. In the electroosmosis process we have the molecules of phenol dragged towards the cathode simultaneously to the water electrolysis. The relative concentrations of phenol were evaluated by UV-Vis spectroscopy. In the experimental setup a reservoir in each electrode was assembled in order to collect the reaction products. The process efficiencies are in a range from 40% to 60%, dependent of the porous medium characteristics. In a broad sense, the technique showed feasible as an economic and ecological procedure for soil and particulate system remediation.