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 83 for “"Chemical treatment"”.
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Chemical treatment of anaerobic digester supernatant
… waste stream, to the headworks of a sewage treatment plant has long been suspected and recognized as being detrimental to the wastewater treatment process. This study was concerned with the removal of phosphorus, nitrogenous, and carbonaceous pollutants from the supernatant by use of …
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Chemical Treatment Approaches For Industrial Plant Decontamination: Mercury remedation
… and recycle. Economical and applicable chemical decontamination i.e. dissolution of elemental Hg should be studied to eliminate this problem to avoid mercury exposure to worker and environment. <br/>In this study, wet-based chemical approaches using KI/I2 solutions were studied for the …
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A Preliminary Investigation of Physical-Chemical Treatment of Slagging Gasifier Aqueous Effluent
… slagging gasifier wastewater by physical-chemical means was studied. Pretreatment and treatment flow schemes were developed by using batch and continuous tests. Results were based mainly on wastewater residual total organic carbon (TOC). A treatment facility was designed and economically …
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Chemical treatment of corroding steel reinforcement after removal of chloride contaminated concrete
… of chloride contaminated concrete and the chemical treatment of the partially exposed rebar through ponding and/or placement of chemically treated mortar. Reinforced concrete specimens were cast and subjected to repeated exposure to NaCl solution. Half-cell potential, corrosion rate, and …
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Chemical treatment of bread corn during milling process to eliminate insect contamination
… fumigations of grain insects with more than 400 chemical compounds. Those compounds which appeared to be best suited for this type of treatment of the corn, were then listed in a separate table and the properties of the compounds detailed so that a selection of the optimum compounds for …
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An evaluation of polyelectrolytes in the chemical treatment of textile mill wastes
… of polyester fibers, disperse dyes, with complex chemical carriers and surfactants have been introduced. These dispersing agents inhibited chemical treatment and passed through biological facilities untreated. Therefore, it was the purpose of this study to ascertain whether chemical treatment with …
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Physical-chemical treatment of landfill leachate : technological performance, spectral characterization and cost estimations
… Biological processes are inefficient for the treatment of stabilized landfill leachate given the presence of recalcitrant organic compounds and low leachate biodegradability. As such, post-treatment is required to meet discharge standards. Therefore, this PhD thesis focused on the …
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Chemical Treatment of Monodominant Cattail Stands In Semipermanent Wetlands: Duck, Invertebrate, and Vegetation Response
… nesting ducks and aquatic invertebrates to the chemical treatments were studied in northeastern South Dakota. Four wetlands were treated with glyphosate in 1985 by fixed-wing aircraft and were compared to cattail-dominated wetlands and wetlands with a natural interspersion of cattail and open …
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Abundance Of Songbirds In Eastern Hemlock Stands Following Chemical Treatment For Hemlock Woolly Adelgid
… of Eastern Hemlock (Tsuga canadensis). While chemical treatments, primarily with the active ingredient imidacloprid, have been implemented, their effects on hemlock dependent avian species are largely unknown. A 2009 study, which took place as HWA was beginning to invade Kentucky, identified …
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Chemical treatment and gas huff-n-puff for enhanced oil recovery in oil shale reservoirs
… were conducted to investigate the effect of chemical treatment, gas huff-n-puff, and/or both on EOR in shale oil reservoirs. Surfactant treatment on shale was studied. Static adsorption experiments were performed to investigate the adsorption behavior of surfactant on shale samples. An …
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A cross sectional comparison of chemical treatment on plant biodiversity at Neudamm farm, Khomas region
This study determined the impacts of chemical application on plant biodiversity in comparison to the control ecosystems over a three-year period at Neudamm farm in Khomas Region, Namibia. In this study, for herbaceous plant sampling, a total of 40 (1m2) quadrats were randomly laid in each of the …
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Initial results for dose-to-clear reduction using the integrated circuit manufacturing with plasma activated chemical treatment (IMPACT) tool
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Identification of changes in the surface of textiles subjected to plasma chemical treatment using attenuated total reflectance-fourier transform infrared spectroscopy
<p>Plasma chemical oxidation has been proposed as a “nondestructive” method for preparing samples from archaeological materials for radiocarbon dating using accelerator mass spectrometry. However, the chemical effects of low-temperature, low-pressure plasma discharges on fragile archaeological …
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Effects of heat and chemical treatment of whole oilseeds on site and extent of digestion of protein and lipid by cattle
… were conducted to determine the impact of treatment processes applied to whole soybeans (SB) and canola seed (CS) on shifting the site of protein and lipid digestion from the rumen to the small intestine of steers. Experiment 1, a 4 x 5 Youden square design utilized four steers (avg BW 373 …
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Chemical and physical changes associated with maturity of different plants and enhancement of nutritional value by chemical treatment of crop residues
Experiments were conducted to study the chemical changes and microanatomical characteristics associated with maturity, rate and extent of DM digestion, behavior and extent of tissue digestion and mode of microbial attack during simulated ruminal digestion. Barley and millet plants were collected at …
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The effect of chemical treatment, fibre length, fibre content and injection moulding parameters to uv irradiation resistance of oil palm fibre reinforced composites
… effect of the fibre length, fibre content, fibre treatment, coupling agent and injection moulding parameter to ultraviolet (UV) light resistance of this composite and also the optimum setting of them were investigated. The UV resistance was examined via the change of mechanical properties after UV …
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A treatment feasibility study of a cellulose acetate manufacturing wastewater
Physical-chemical treatment has been shown to be highly successful in treating certain wastewaters and, to some degree, this treatment approach has been promoted as a panacea for all wastewater treatment problems. This project was designed to investigate the best method of treating a wastewater …
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Microwave -Swing Adsorption for the Capture and Recovery, or Destruction for a More Sustainable Use of Organic Vapors
… control of the organic vapor concentration. Chemical treatment of the ACFC had a significant effect on ACFC's adsorption and regeneration properties. This research contributes to the development of novel vapor control techniques to effectively and economically control vapor emissions.
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A study on chemical stabilization of Oil Sands Mature Fine Tailings
… difficult and time-consuming. In this thesis, chemical stabilization of MFT is investigated in an experimental program. Portland cement (PC) and two liquid-based silicate grouts (NS and AAAS) are used for stabilization of MFT. The effectiveness of these stabilizers at different dosages and …
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The Role of Carbonaceous Materials in Pavement Dust, Soils, and Lake Sediments on the Fate of Organic Pollutants in Small Urban Watersheds
… (CCMs) fractions with sequential physical and chemical treatment. These fractions and bulk samples were characterized with elemental analysis, Fourier transform infrared spectroscopy, specific surface area measurement, and solid state 13C nuclear magnetic resonance spectroscopy. Sorption …
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