Search results for "Carbon adsorption"

showing 2 items of 2 documents

Combination of advanced oxidation processes and active carbons adsorption for the treatment of simulated saline wastewater

2016

Abstract In the present work, an integrated process combining three different technologies, i.e. heterogeneous photocatalysis, homogeneous ozonation and adsorption on granular activated carbon (GAC) was used for the treatment of a synthetic solution simulating saline wastewater. The synergistic effects between the different methods enhance the oxidation rate of the organic compounds in the integrated process, so that its use may result sustainable. It has been found that a relatively low oxidation rate is sufficient to obtain the highest synergy between the three technologies and to maximize the performances. In particular, coupling ozonation and photocatalysis resulted in 20% enhancement i…

ImaginationChemical substancemedia_common.quotation_subjectFiltration and Separation02 engineering and technology010501 environmental sciences01 natural sciencesAnalytical Chemistrylaw.inventionAdvanced oxidation processes Active carbon adsorption Ozonation Photocatalysis Saline wastewaterReaction rateAdsorptionMagazinelawSettore CHIM/01 - Chimica Analitica0105 earth and related environmental sciencesmedia_commonSettore ING-IND/24 - Principi Di Ingegneria ChimicaChemistryEnvironmental engineering021001 nanoscience & nanotechnologyWastewaterChemical engineeringPhotocatalysisSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie0210 nano-technologyScience technology and societySeparation and Purification Technology
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First-principles calculations of the initial incorporation of carbon into flat and stepped Pd surfaces

2010

We employ density-functional-theory calculations to examine carbon adsorption and diffusion in Pd bulk, and on Pd(111) and Pd(211) surfaces. Different possible subsurface and on-surface structures are explored and the most stable structures are analyzed. We calculate various diffusion paths: lateral diffusion on a surface, migration to a subsurface region, and within the first interlayer. Our calculations show in accordance with the earlier theoretical results that on Pd(111) carbon prefers to adsorb on octahedral interstitial sites. On Pd(211) the fourfold hollow site under the step is energetically the most favorable one and the second best sites are the octahedral sites. The calculations…

Materials scienceDiffusion barrierDiffusionchemistry.chemical_elementNanotechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsAdsorptionchemistryOctahedronChemical physicsInterstitial defectLateral diffusionCarbon adsorptionCarbonPhysical Review B
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