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Showing 1 to 17 of 17 for “"poplar trees"”.
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Life cycle analysis of hybrid poplar trees for cellulosic ethanol
… and environmental benefits of cultivating hybrid poplars as a biomass crop for cellulosic ethanol. A "Life Cycle Assessment" (LCA) methodology is used to systematically evaluate the hybrid poplar's energy input and output as well as greenhouse gas (GHG) emissions. The system boundary is divided …
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Evapotranspiration Measurement and Simulation due to Poplar Trees at a Phytoremediation Site
… was chosen as the remediation strategy. Hybrid poplar trees (1,036) were planted in 1997 within 0.7 acres. The goals of the phytoremediation system are to prevent migration of the contaminant off the site and clean up the contaminant in-situ. This study is focused on quantifying the rate of …
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Polycyclic Aromatic Hydrocarbons and Redox Parameters in a Creosote-Contaminated Aquifer
… 1998 and July 2000. Nearly one-thousand hybrid poplar trees were planted on-site in 1997 to help contain the groundwater plume and enhance phytoremediation. Ten polycyclic aromatic hydrocarbons (PAHs) were monitored along with several terminal electron acceptors (TEAs) and their reduced end …
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Factors influencing basal area growth of yellow-poplar ( Liriodendron tulipifera L.) in central West Virginia
… plots to evaluate basal area growth of yellow-poplar (Liriodendron tulipifera L.) as related to four topographic factors (aspect, slope position, steepness, and landform), two competition variables (basal area per acre and trees per acre) and four tree characteristics (age, diameter, total …
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Relationships Between Hybrid Poplar Tree Extractives and Ground Water Contamination at a Phytoremediation Site
… 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 and ground water. After planting, a seasonal ground water testing program began that monitored the …
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Development of dimension lumber grade and yield estimates for yellow-poplar sawlogs and trees
… is that eastern hardwoods in general, and yellow-poplar (Liriodendron tulipifera L.) in particular, are underutilized. At present, dimension lumber used in light frame construction is almost exclusively manufactured from softwood species. Recent literature, research, and conferences have pointed …
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Phytoremediation Mechanisms of a Creosote-Contaminated Site
… implemented with the planting of 1,026 hybrid poplar trees and 36 cells of vegetated and unvegetated grass and legume treatments. The hybrid poplar tree phytoremediation system was designed to control infiltration and groundwater flow and enhance subsurface remediation. The grass …
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Impact of Phytoremediation System on Groundwater Flow in a Shallow Aquifer System
… is an engineered method that utilizes plants and trees to remove or immobilize inorganic and organic contaminants. The plants and trees can contain contaminant plumes, uptake the contaminants, or aid in the degradation of the contaminants through several poorly understood mechanisms. Hybrid poplar …
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Patterns of Population Structure and Hybridization within and between Populus trichocarpa and Populus balsamifera
… hybridize where their ranges overlap, and poplar hybrids are the most frequently planted genotypes for fiber production. To better understand the genomics of hybridization in Populus, we sampled and sequenced the genome of 574 poplar trees from six east-west transects across the hybrid zone …
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In situ characterization and quantification of phytoremediation removal mechanisms for naphthalene at a creosote-contaminated site
… 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 and three-ring compounds. …
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Push-pull Tests to Quantify In-situ Naphthalene Phytoremediation Rates
… site and to assess the contribution of hybrid poplar trees to polynuclear aromatic hydrocarbon (PAH) remediation. Well positioning enabled comparison between contaminated and non-contaminated locations, as well as comparisons between locations with and without trees. Comparison of areas with …
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Bioremediation of Trichloroethylene: Analysis of the Plant Gene Response to TCE and Characterization of a Novel TCE-Degrading Endophyte
… transporters are involved in TCE metabolism in poplar. The study found that poplar trees do have a genetic response to TCE and that many putative detoxification genes are differentially regulated. Previous studies demonstrated that transgenic hybrid poplar plants expressing mammalian cytochrome …
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Effects of the Desorption and Dissolution of Polycyclic Aromatic Hydrocarbons on Phytoremediation at a Creosote-Contaminated Site
… Oneida, Tennessee. Phytoremediation using hybrid poplar trees was chosen as the remedial technology on-site. Since monitoring began, the contaminant plume has been shrinking consistently and evidence has shown that remediation is taking place. However, remediation may be rate-limited by the …
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Characterization of a Creosote-Contaminated Tie Yard Site and the Effects of Phytoremediation
… selected as the remedial technology and hybrid poplar trees were planted at the site in 1997. A research project was designed to: 1) characterize the site through collection of soil and ground water samples; 2) assess phytoremediation effects of 3 grasses, clover, fescue and rye, in …
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Functional analysis of Poplar genes regulating flowering and vegetative growth
Poplar (Populus spp. and hybrids) are used for pulp, paper and solid wood products. Furthermore, poplar is being developed as a dedicated biomass crop for biofuels and biomaterials. Thus, methods to accelerate genetic improvement to improve woody biomass yield, quality and optimal growth on …
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Direct Volatilization of Naphthalene at a Creosote-Contaminated Site with a Phytoremediation System
… 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 the subsurface. Since then, Virginia Polytechnic Institute and State University has monitored eight …
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Effect of bioenergy crops and fast growing trees on hydrology and water quality in the Little Vermilion River Watershed
… functional components and parameters of hybrid poplar Tristis #1 (<em>Populus balsamifera</em> L. × <em>P.tristis</em> Fisch) and eastern cottonwood (<em>Populus deltoides</em> Bartr.) were determined, and related algorithms improved in ALMANAC and SWAT based on improved simulation of leaf area, …