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Showing 1 to 20 of 36 for “"petroleum hydrocarbon"”.
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Bioremediation of petroleum hydrocarbon contaminated soil
The bioremediation of petroleum contaminated soil in large-scale treatment units was studied in conjunction with Sybron Chemicals Inc., Salem, VA. The soil had been previously contaminated and was spiked with additional petroleum. Water with different characteristics was circulated through the soil …
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Soil washing and post-wash biological treatment of petroleum hydrocarbon contaminated soils
… was conducted to investigate the treatability of petroleum contaminated soils by soil washing and subsequent biological treatment of the different soil fractions. In addition to soils obtained from contaminated sites, studies were also performed on soils contaminated in the laboratory. Soil …
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Assessment of Petroleum Hydrocarbon Contamination In Terrestrial Ecosystems Using Conventional and Novel Approaches
Petroleum hydrocarbon (PHC) contamination has emerged as a pressing global concern, due to its impacts on human health and ecosystems, and presents a major challenge for remediation efforts. The heterogeneous nature of PHC mixtures and natural weathering processes that influence the bioavailability …
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Monitoring phytoremediation of petroleum hydrocarbon contaminated soils in a closed and controlled environment
… conditions. The main objectives were: to examine petroleum hydrocarbon (PHC) transfer and degradation processes involved in phytoremediation of contaminated field soils; to compare phytoremediation of contaminated field soils with intrinsic bioremediation; and, to develop a rationally-based model …
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Biochar as a soil amendment to enhance petroleum hydrocarbon degradation in northern landfarms
… in northern regions slows efforts to remediate petroleum hydrocarbon (PHC) contaminated soils through conventional landfarming practices. Thus, cost-effective soil remediation strategies that are active under frozen conditions and specific to cold regions are in strong demand. Biochar amendments …
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The effect of freeze /thaw temperature fluctuations on microbial metabolism of petroleum hydrocarbon contaminated Antarctic soil
<p>Petroleum contaminated soil exists at McMurdo Station in Antarctica. These soils were contaminated with historic releases of JP-8 jet fuel. Over time, there does not appear to have been significant reduction in the petroleum concentrations in these soils. This lack of reduction has been …
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The creation of novel methodologies to examine the effects of phosphorus amendments on petroleum hydrocarbon bioremediation
Successful soil petroleum hydrocarbon (PHC) bioremediation demands adequate phosphorus (P) concentrations. However, rapid adsorption and precipitation processes in calcareous soils lower labile soil P concentrations. As the P form impacts bioavailability, we hypothesized that the P amendment form …
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Root adaptive responses of tall fescue (Festuca arundinacea) growing in sand treated with petroleum hydrocarbon contamination
… that are contaminated with polycyclic aromatic hydrocarbons (PAHs), especially low molecular weight, mobile PAHs such as naphthalene pose a significant challenge to this. Plant roots growing in these soils exhibit changes to their structure, physiology and growth patterns. Tall fescue (Festuca …
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Characterization and genome-scale metabolic modeling of catechol-degrading Pseudomonas fluorescens isolated from a petroleum hydrocarbon-impacted site
… fluorescens is a candidate for efficient petroleum hydrocarbons (PHC) biodegradation. In this work, a P. fluorescens strain was isolated from a local PHC-impacted site. To investigate its PHC biodegradation performance, catechol, an important metabolic intermediate during monoaromatic …
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Stress-tolerant bioremediation strategy for cold-climate sites: laboratory, modelling, and field studies for extending petroleum hydrocarbon biodegradation to seasonally freezing and frozen contaminated soil phases
Bioremediation of petroleum hydrocarbon-contaminated soils in cold climates is challenging due to low temperatures, limited field accessibility, and low microbial activity. Conventional bioremediation practices have focused on short summers in cold climates, but the feasibility of extending …
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Strategies for enhancing bioelectrochemical remediation of petroleum hydrocarbons
Globally, Petroleum Hydrocarbons (PH) contamination in the environment is widespread due to accidental spillages, leakages and indiscriminate disposal. PH pollutants are continuously a concern because of their high toxicity to humans and the environment. While there have been efforts to remediate …
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The Detoxification of Petroleum Contaminated Coastal Plain Sandy Soil Using an Amended Vermicomposting Approach
… treatment approach for detoxifying petroleum hydrocarbon contaminated sandy soil. The bench-scale testing of gasoline and diesel contaminated soil using three test soil vessels and one control soil vessel was performed in a laboratory setting for a six week time period. The control …
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Sequential Electron Acceptor Model of Intrinsic Bioremediation at a BTEX Contaminated LUST Site in Laurel Bay, South Carolina
… transport modeling is being used more often at petroleum hydrocarbon contaminated sites in an attempt to aid engineers in evaluating the feasibility of natural attenuation as a remediation alternative in groundwater systems. In this research, a three-dimensional sequential electron acceptor …
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Rapid identification of oil contaminated soils using visible near infrared diffuse reflectance spectroscopy
Initially, 46 petroleum contaminated and non-contaminated soil samples were collected and scanned using visible near-infrared diffuse reflectance spectroscopy (VisNIR DRS) at three combinations of moisture content and pretreatment. The VisNIR spectra of soil samples were used to predict total …
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Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil.
… The predominant pollutant from oilfield waste is petroleum hydrocarbons. Some effects of petroleum hydrocarbon contamination in soil include loss of nutrients, reduced fertility, foul odour, flora/fauna imbalance and potential for transport and distribution to other media. Several studies have …
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Demulsification and recycling of spent oil based drilling fluid as nanofiller for polyamide 6 nanocomposites.
… are global liabilities due to their hazardous hydrocarbon content, which impacts negatively on flora, fauna, and global carbon footprint. The formulation of two demulsifiers to ensure chemically-enhanced phase-separation of this waste into oil, water and solid components was successfully …
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Microbial Activity during Biodegradation and its Effects on Groundwater Velocity in a Contaminated Aquifer
A petroleum hydrocarbon plume was introduced into a controlled flow gate within the relatively homogenous Borden aquifer, Canada. Down-gradient of the release, O2 was added to stimulate microbial activity and biodegradation in the aquifer. Changes in groundwater velocity associated with biological …
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Effect of water table fluctuations on petroleum contamination distribution
… the water table level at different rates on petroleum contamination distribution. The experiments were carried out using a two-dimensional sand tank model. The experimental Light Non Aqueous Phase Liquid (LNAPL) was No. 2 Diesel fuel and the experimental media was sand (Sieve 20). A known …
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Aerobic Biodegradation of MTBE in Uncontaminated and Gasoline-Contaminated Aquifer Sediments
… in aquifer sediments containing a low level of petroleum contamination than in heavily contaminated aquifer sediments. Biodegradation of MTBE appeared to be limited by a lack of oxygen in heavily contaminated soils. When degradation was discernible it appeared to follow a first order pattern …
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