Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"Granular Activated Carbon (GAC)"”.
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The effects of metals on thermal regeneration of granular activated carbon
… was to explore how accumulated metals on granular activated carbon (GAC) affected thermal regeneration, and to determine whether thermal regeneration could restore the spent GAC's virgin adsorption capacity, despite the metals.
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Predicting the removal of atrazine by powdered and granular activated carbon
… removal in full scale and pilot scale powdered activated carbon (PAC) and granular activated carbon (GAC) adsorption processes.
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Thermal regeneration of activated carbon for the treatment of drinking water
Granular activated carbon (GAC) has been specified as the best available technology (BAT) for the removal of synthetic organic compounds from drinking water. Drinking water utilities which use GAC must either replace or regenerate the carbon periodically. Thermal regeneration is one option for …
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Phenol oxidation on the surface of granular activated carbon under water treatment conditions
Chemical activity of granular activated carbon (GAC) toward adsorbed phenol were investigated in a fixed bed column. After adsorption from aqueous solution, phenol was oxidized to carbon-carbon (C-C) and carbon-oxygen (C-O) bonded dimers as well as an oxidized compound of uncertain structure …
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Effects of Activated Carbon on Reactions of Free and Combined Chlorine With Phenols (Chlorination, Gac)
… in contact of free or combined chlorine with activated carbon, which is used to remove organic compounds from water. Free chlorine reacts with a group of phenols (phenol, guaiacol, catechol, 2,6-dimethoxyphenol, p-chlorophenol) in dilute aqueous solutions (10('-5)M), to produce mono-, di-, or …
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Characterization of gas phase adsorption capacity of untreated and chemically treated activated carbon cloths
Granular activated carbon (GAC) and powdered activated carbon (PAC) have long been used to effectively treat drinking water, waste water, and industrial gas streams. Undesired contaminants are removed by adsorption onto activated carbon. While activated carbon has been used extensively in …
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An innovative reactor design for the treatment of biologically inhibitory wastewater
The anaerobic expanded-bed granular activated carbon (GAC) reactor combines biological and physical removal mechanisms to continuously treat biologically inhibitory wastewaters. An innovative reactor design that decouples biological and physical removal mechanisms by combining a GAC adsorber with a …
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Evaluation of activated carbon processes for removing trihalomethane precursors from a surface water impoundment
… to investigate the effectiveness of powdered activated carbon [PAC] and granular activated carbon [GAC], with and without preoxidation, for reducing trihalomethane [THM] precursor concentrations in Harwood's Mill Reservoir water. Preoxidation with ozone followed by GAC is referred to as the …
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Continued optimization of a microelectrolysis treatment process for removal of arsenic from landfill gas condensate, characterization of materials, and evaluation of Fe as a predictor of treatment monitoring
… uses a combination of zero-valent iron (ZVI) and granular activated carbon (GAC). This study compared the performance of alternative types of ZVI/GAC media and examined effects of other treatment variables including pH, agitation methods, and media cycling. This study also addressed the …
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A novel bioadsorption-flocculation fluidized bed bioreactor prior to membrane filtration for wastewater treatment and reuse
… relevant to all the above issues. Firstly, the granular activated carbon (GAC) fluidised bed bioreactor was designed and developed through a series of study on (i) bioadsorption capacity of granular activated carbon (GAC) in terms of dissolved organic carbon (DOC) removal from wastewaters, (ii) …
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Surface Modification Of Exhausted Activated Carbon For The Enhanced Removal Of Per- And Polyfluoroalkyl Substances
Granular activated carbon (GAC) is a treatment technology commonly used in drinking water treatment. Recently, a maximum contaminant limit (MCL) has been proposed for a group of per- and polyfluoroalkyl substances (PFAS), a class of chemicals that have been used in many consumer products and …
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Elucidating the relative environmental sustainability of anaerobic membrane bioreactor (AnMBR) development pathways
… sustainable, while the addition of granular activated carbon (GAC) into the AnMBR of the same reactor type and configuration would circumvent the principal source of life cycle impacts (gas sparging) and achieve the most en- vironmental sustainable design. The significance of the …
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The economic impacts of the 1986 Safe Drinking Water Act amendments
… and documented. These technologies include granular activated carbon (GAC); reverse osmosis; ion exchange; and various aeration, filtration, and disinfection technologies. Several case studies that assess and highlight the direct impacts of the 1986 SDWA Amendments upon Virginia water …
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Sorption and desorption of the industrial chemical MCHM into polymer pipes, liners and activated carbon
… into polymer drinking water infrastructure and granular activated carbon (GAC). Experiments for sorption of non-polar toluene and polar 1-butanol were conducted as a comparison for MCHM sorption. Additionally, a brief odor analysis was done on the ability of activated carbon to remove odor from …
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Granular activated carbon pretreatment for the removal of trihalomethane precursors
Granular activated carbon (GAC) pretreatment was evaluated for the removal of trihalomethane (THM) precursors from a surface water supply, the Occoquan Reservoir, in northern Virginia. The carbon contactors were operated in the upflow mode at flow rates of 2, 4, and 6 gpm which provided empty bed …
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Removal of organic contaminants from aqueous systems
… polymeric resins MN500 and S957, and Granular Activated Carbon (GAC) were tested as sorbents. The results show the kinetics of adsorption, for all contaminants, follow pseudo-second order models with rates controlled by particle diffusion. For adsorption of NB, PCT and HQ, the …
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Physical-chemical treatment of landfill leachate : technological performance, spectral characterization and cost estimations
… i.e. ozonation, coagulation-flocculation, granular activated carbon (GAC) adsorption, and ion exchange. The aim was obtaining an optimized and cost effective integrated leachate treatment train. The research also used spectral and chemometric techniques to characterize dissolved organic …
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Evaluation of hybrid treatment configurations of granular activated carbon and alternative adsorbents for per- and polyfluoroalkyl substances removal from surface water and groundwater
… adsorption-based treatment technologies like granular activated carbon (GAC) and anion-exchange resins have been used extensively, but often see diminished performance with “challenging” waters that contain competitive adsorbates such as dissolved organic matter (DOM) and/ or total dissolved …
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Assessing Biofiltration without Ozonation for Removal of Trihalomethane Precursors in Drinking Water at the Beaver Water District Drinking Water Treatment Plant
… NOM surrogates – which include dissolved organic carbon (DOC), specific ultraviolet absorbance (SUVA254) and fluorescence-PARAFAC components – were measured weekly throughout the 30-week study to assess their suitability to track DBP precursor removal. RSSCTs containing DOC-exhausted granular …
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Removal of selected water disinfection byproducts, and MTBE in batch and continuous flow systems using alternative sorbents.
… a strongly basic anion exchange resin, and granular activated carbon (GAC). Batch experiments were conducted on spiked Milli-Q® and lake water matrices. Results indicate considerable sorption of TCE (68.9%), slight sorption of bromate ions (19%) and no appreciable sorption for the other test …
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