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Showing 1 to 20 of 27 for “"creosote"”.
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Phytoremediation Mechanisms of a Creosote-Contaminated Site
In 1990, creosote contamination was discovered at the location of a railroad tie treatment facility active in the 1950s until 1973. In 1997, a phytoremediation field study was implemented with the planting of 1,026 hybrid poplar trees and 36 cells of vegetated and unvegetated grass and legume …
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The development of creosote macroemulsions to be used for wood preservation
Creosote treated timber "bleeds" profusely in hot weather and develops tarry, oily surfaces that are difficult to handle and pose a health hazard. The objective of this work is to investigate the possibility of improving the surface condition of the creosote treated timber. The possibility of using …
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Effects of Grasses on the Remediation of Creosote-Contaminated Surface Soil
… site of a former railroad tie facility that used creosote for tie preservation. The site is contaminated with polycyclic aromatic hydrocarbons (PAHs). A test matrix consisting of 36 planted (clover, fescue and rye grasses) and unplanted cells was established. The focus of the study was to evaluate …
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Polycyclic Aromatic Hydrocarbons and Redox Parameters in a Creosote-Contaminated Aquifer
… wood-preserving site that was contaminated with creosote. Twenty-five multi-level samplers (MLSs) were installed on-site and groundwater samples were collected and tested regularly between March 1998 and July 2000. Nearly one-thousand hybrid poplar trees were planted on-site in 1997 to help …
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Characterization of a Creosote-Contaminated Tie Yard Site and the Effects of Phytoremediation
A creosote treatment facility was active during the 1950’s and 1960’s at a railroad tie yard site. In 1990, creosote contamination was discovered along a creek bank at the site. Phytoremediation was selected as the remedial technology and hybrid poplar trees were planted at the site in 1997. A …
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Direct Volatilization of Naphthalene at a Creosote-Contaminated Site with a Phytoremediation System
In 1990, creosote contamination was discovered at a railroad tie yard in Oneida, Tennessee. A phytoremediation system that included over 1,200 hybrid poplar trees was installed between 1997 and 1998 for hydraulic control of the groundwater and enhancement of the natural biodegradation processes in …
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In situ characterization and quantification of phytoremediation removal mechanisms for naphthalene at a creosote-contaminated site
… quantify removal mechanisms for naphthalene at a creosote-contaminated site with poplar trees in Oneida, Tennessee. Groundwater monitoring for seven years in the surficial aquifer at this site demonstrated a reduction in polycyclic aromatic hydrocarbons (PAHs) with selective removal of naphthalene …
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Effects of the Desorption and Dissolution of Polycyclic Aromatic Hydrocarbons on Phytoremediation at a Creosote-Contaminated Site
Creosote, containing many high molecular weight hydrophobic polycyclic aromatic hydrocarbons (PAH's), is present in the subsurface environment at the Oneida Tie-Yard in Oneida, Tennessee. Phytoremediation using hybrid poplar trees was chosen as the remedial technology on-site. Since monitoring …
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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
… 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 57.52 …
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Preservative treatment evaluation of five Appalachian wood species with four preservatives
… treated almost exclusively with the preservative creosote in order to improve durability. This has led to the knowledge that hardwoods treated with creosote are extremely durable. However, there have been few well documented studies of what has been termed "treatability". This work investigated …
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INFLUENCE OF ADSORPTION AND OXYGEN LIMITED BIODEGRADATION ON THE TRANSPORT AND FATE OF A CREOSOTE PLUME: FIELD METHODS AND SIMULATION TECHNIQUES (HYDROCARBON, GROUNDWATER, MODELING, TRACER TEST)
Field monitoring at the United Creosoting Company (UCC) site in Conroe, TX has shown that the shallow aquifer has become contaminated by leakage from two unlined ponds. A plume of hydrocarbon contaminated ground water is present and is contained within a large plume of elevated chloride …
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Assessing the fate of PAHs in the Boston Inner Harbor using semipermeable membrane devices (SPMDs)
… weight petroleum 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 …
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Strengthening of timber beams using externally-bonded sprayed fibre reinforced polymers
… either a water based (Borocol) or oil borne (Creosote) antifungal preservative prior to being sprayed with FRP. Different combinations of adhesives/bonding agents including Hydroxymethylated Resorcinol and Polymeric Isocyanates were used to try to develop a strong bond. When considering using …
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Rehabilitation of timber railroad bridges using glass fiber reinforced polymer composite wraps
… speed.;To verify bonding capabilities of creosote treated 50+ year old timber with GFRP composite wraps and evaluate the recovery of strength of repaired timber beams, four full scale (8&inches; x 16&inches; x 12&feet;) timber stringers were tested in a controlled laboratory setting in …
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Detection and analysis of the wood decay fungus <i>Lentinus Lepideus </i>Fr. using immunological probes
… small field trial using nine creosote-treated distribution pole stubs was established. <i>L. lepideus</i> was identified within core sections removed from the poles using microbiological isolation techniques and the dot-immunobinding assay. A statistically significant level of …
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Impact of Phytoremediation System on Groundwater Flow in a Shallow Aquifer System
… Hybrid poplar trees were planted to contain a creosote contaminant plume at the study-site in Oneida, Tennessee. This research looks at how the trees will affect groundwater flow in the site. This is accomplished with the groundwater modeling program MODFLOW. The trees are simulated using the …
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Railroad Tie Lateral Resistance on Open Deck Plate Girder Bridges
… of vertical axle load, species of wood, and creosote retention in the tie, while fastener resistance varies based on type of fastener and lateral displacement of the tie. An approximation of the lateral resistance as a function of lateral displacement was established depending on the vertical …
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Direct liquefaction of coal with coal-derived solvents to produce precursors for carbon products
… (DACL-L). The other two liquids were heavy creosote oil (HCO) and carbon black base #1 (CBB) from Koppers Industries, Inc. These liquids were used as hydrogenation solvents under varying reaction conditions such as gas pressure, gas composition, and solvent-to-coal ratio. The products were …
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Relationships Between Hybrid Poplar Tree Extractives and Ground Water Contamination at a Phytoremediation Site
In 1997, a phytoremediation program began at a creosote-contaminated former railroad tie yard in Oneida, Tennessee with the planting of over 1000 hybrid poplar trees onsite. Creosote, a mixture of hazardous chemicals composed of 85% polycyclic aromatic hydrocarbons (PAH) had entered the site soil …
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Evapotranspiration Measurement and Simulation due to Poplar Trees at a Phytoremediation Site
… yard in Oneida, Tennessee was contaminated with creosote in the 1950s and 1960s through cross tie treatment. The problem was discovered in 1990 and phytoremediation in combination with an interception trench was chosen as the remediation strategy. Hybrid poplar trees (1,036) were planted in 1997 …
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