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 29 for “"coal-tar"”.
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Thermal reactions of freshly generated coal tar over calcium oxide
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.
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The effect of temperature, pressure and catalytic agents on coal tar distillates
Made available in DSpace on 2017-11-30T21:03:36Z (GMT). No. of bitstreams: 2 5999350.pdf: 15596843 bytes, checksum: cc8d4750085f4c58435121ae1209e72b (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1918
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Groundwater fate of aromatic hydrocarbons at industrial sites : a coal tar site case study
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Use of solvents for PAHs extraction and enhancement of the PAHs bioremediation in coal-tar-contaminated soils
<p>Bioremediation of coal-tar-contaminated soils is a challenging task because of the low solubility of the polycyclic aromatic hydrocarbons (PAHs) and their high partitioning with soils. As such, not all the PAHs present in the soil will be available for biodegradation. Enhancing the availability …
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Fate of polycyclic aromatic hydrocarbons associated with coal-tar pitch, asphalt, charcoal, and soot in urban lake sediments
… and carbonaceous materials (CMs) such as coal tar and asphalt sealcoat and soot. PAH concentrations in urban lakes are often above sediment quality guidelines which have been identified as harmful to aquatic life. A better understanding of the fate of PAHs bound to these CMs in lake …
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An investigation of factors affecting the concentrations of polycyclic aromatic hydrocarbons in groundwater at coal tar waste sites
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
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The effects of water-soluble fractions of naphthalene, phenanthrene, no. 2 fuel oil, and coal-tar creosote on the freshwater cladoceran, Daphnia pulex
… naphthalene, phenanthrene, No. 2 fuel oil, and coal-tar creosote on the survival, growth, reproduction, feeding, and metabolism of Daphnia pulex. The 48 hr LC50 values after acute exposure (as percent WSF) for creosote, No. 2 fuel oil, phenanthrene and naphthalene were 2.91, 34.10, >>100, and …
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Synthesis of acetyl acetophenone
… and sedatives. It is found to a small extent in coal tar. It has basic properties and is extracted from the heavy oil of coal tar with sulfuric acid.</p><p>The purpose of this research is to synthesize one of the compounds which is not present in the compilation of the natural lists and to …
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Food colours:a study of the effects of regulation
… list of 1957 reduced the proportion of harmful coal tar dyes from 54% of the total to 20%. Regulations brought a greater reduction in hazard levels than voluntary trade action. Delays in the introduction of a positive list created a significant hazard burden. EFFECTS ON INNOVATION were assessed …
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Toxicity mechanism of anthropogenic water contaminants: drinking water disinfection by-products (haloacetic acids) and particle associated contaminants from sealcoats (polyaromatic hydrocarbons) in lake sediments
… toxicity mechanisms and identify the molecular targets of all the regulated and non-regulated haloacetic acids (HAAs) water DBPs, ii) to differentiate among the toxicity mechanisms of mono-, di-, and triHAAs, iii) to evaluate the toxicity potential of chlorinated and chloraminated wastewater …
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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
… to the sorption contribution from asphalt and coal tar. No statistically significant correlation was observed between CM properties and sorption parameters. The phenanthrene sorption to bulk samples is dominated by CCMs in HFr fractions.
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ΠΡΟΣΤΑΣΙΑ ΧΑΛΥΒΑ ΑΠΟ ΔΙΑΒΡΩΣΗ
… OF THE ALREADY EXISTING PAINTS (SUCH AS THE COAL TAR EPOXY AND THE CHLORINATED RUBBER), WITH THE USAGE OF H-SEMICONDUCTORS (I.E. Γ-AL2O3, RED MUD, DOPPED OXIDES) OR, INSTEAD OF THE ABOVE, NEW PAINTS USING THE EPOXY AS BASE, HAVE BEEN DEVELOPED. THE PIGMENT CONTENT OF THE VEHICLES, HAS BEEN …
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Evaluation of non-invasive biomarkers for carcinogenic exposure to cigarette smoke
… Urine samples from psoriasis patients undergoing coal tar therapy were also obtained. Urinary BaPT and 1-OHPG levels were assayed.;Results. While BaPT levels ranged from undetectable to 11 pmol/10ml in psoriasis patients (mean = 4 {dollar}\pm{dollar} 3.4 pmol/10ml), most samples from smokers or …
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One hundred years of environmental pollution at Chattanooga Creek: a review of selected studies
… beginning with animal wastes in the early 1900s, coal tar from government operated coke ovens during the WWII era, and large amounts of industrial wastes in the latter part of the century. Today the creek is officially closed to the public but the status of its water and sediments remains …
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Hydrogen-Rich Syngas Derived from Smouldering Biomass and Hydrocarbon Wastes
… which completely treated woody biomass and coal tar while generating hydrogen. The maximum hydrogen concentration achieved in the smouldering system was 33.7% resulting in a net energy positive syngas. Evidence suggests that both heterogenous gasification and the water gas shift are the …
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Rapidly-Deployable Materials Processing Approaches for Energy Applications and Chemical Separations
… of graphene oxide membranes. We examine coal tar pitch-derived graphene oxide to understand means of improving the permeance and chemical stability of graphene oxide membranes without reducing their nanofiltration capacity. Furthermore, I investigate laser annealing with a CO₂ laser …
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Assessing the fate of PAHs in the Boston Inner Harbor using semipermeable membrane devices (SPMDs)
… source such as diesel, creosote, and/or coal tar. The ratios of pyrene-to-fluoranthene suggested another type of origin. Based on the pyrene-tofluoranthene ratios obtained here, Boston air, street dust, and creosote are also potential major primary sources of PAHs in the study area. SPMDs …
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Assessment of exposure and effects associated with polycyclic aromatic hydrocarbon contamination in south Chattanooga, Tennessee
… this area to the Tennessee River. The dumping of coal tar and other industrial waste in this area h as lead to the contamination of Chattanooga Creek and soil of the surrounding floodplains. Many polycyclic aromatic hydrocarbons (PAHs) are found in these areas, specifically the 16 PAHs the EPA and …
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