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Showing 1 to 20 of 87 for “"Phenanthrene"”.
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Sorption and biodegradation of phenanthrene in soils
… contaminants. Sorption and biodegradation of phenanthrene, a hydrophobic polycyclic aromatic hydrocarbon, were modeled using soil and water microcosms. The soils were prepared in the laboratory from a parent soil to obtain sorbents that were similar in all respects except for soil organic …
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Anthracene, and its isomer, phenanthrene, and their derivatives; with a short investigation of the methods for the quantitative estimation of phenanthrene and anthracene
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemistry, 1876
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THE INFLUENCE OF SURFACTANTS ON THE SORPTION OF PHENANTHRENE IN NATURAL WATERS
… solubility and sorption of a '''C-labelled PAH (phenanthrene) in the presence of representative surfactants from the three main groups, i.e., anionic, nonionic and cationic. Initially the four compounds were examined in isolation at two temperatures (8°C and 20°C), salinities and particle …
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PHYSIOLOGY AND ESTUARINE ECOLOGY OF PHENANTHRENE-DEGRADING BACTERIA (MYCOBACTERIUM, MICROLAYER, METABOLITES, PAH, MARINAS, NEW HAMPSHIRE)
… of the polycyclic aromatic hydrocarbon (PAH), phenanthrene, by estuarine enrichment and pure microbial cultures was examined.</p><p>A Mycobacterium species, strain BG1, able to use phenanthrene as sole carbon and energy source, was isolated from estuarine sediment. Phenanthrene degradation …
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Impacts of microbial activity on trace metal behavior during the bioremediation of phenanthrene-contaminated soils
A novel method for the bioremediation of phenanthrene using the fungus Penicillium frequentans was utilised to remove phenanthrene (200 mg kg\(^{-1}\)) from soil containing both metals and phenanthrene, over 29 days. Bioremediation of phenanthrene and its effects on trace metal behaviour has been …
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The asymmetric synthesis of hexahelicene : the photocyclization of 2-styrylbenzo[c]phenanthrene in cholesteric liquid crystals and chiral media
Contains fulltext : MMUBN000001_065981790.pdf (Publisher’s version ) (Open Access)
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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
… of water-soluble fractions (WSF) of 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 …
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Physiochemical and Biological Behaviors of Organic Contaminants in Multi-Phase Media Under Enhanced Treatment Conditions
… of pyrene in soil-water system. The mobility of phenanthrene in soil could be also enhanced by introducing organic acids. The biosurfactant-enhanced remediation of PAH-contaminated soil in the presence of SCOAs has been studied. The results supported the combined use of biosurfactant and SCOAs …
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Efficiency of PAHs removal from clayey soil using supercritical fluid extraction
… on various compositions of clayey soils. Phenanthrene was used to examine the extraction efficiency of PAHs from clayey soil. Phenanthrene concentration in soil specimen was determined by UV. Carbon dioxide was chosen as the supercritical fluid and 5% (mol) methanol was used as a modifier. …
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Chemical synthesis of glycosylated oligoribonucleotides for siRNA development
… perbenzylated ribofuranosyl pyrene and phenanthrene were synthesized from perbenzylated ribolactone. Deprotection of benzyl-protected ribofuranosyl phenanthrene and pyrene by boron tribromide gave ribofuranosyl phenanthrene and ribopyranosyl pyrene, respectively. UV/vis and fluorescent …
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Investigations of highly conjugated macrocycles and polymers for aggregation and chemical sensing
… extended over multiple aromatic rings, new phenanthrene and triphenylene-containing bis(salicylates) were synthesized. A convenient route to 3,6,9,10-tetraalkoxy-2,7-diiodophenanthrene was developed. This compound has been found to be a useful precursor for Pd-catalyzed cross-coupling …
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Substrate Specificity and Molecular Characterization of PAH-Degrading Anaerobic Enrichment Cultures Under Methanogenic Conditions
… aromatic hydrocarbons (PAHs), naphthalene or phenanthrene, as a sole carbon source. Characterization of the enrichment cultures by 16S rDNA analysis revealed two unique populations, though they were initiated from the same sediment source. This study set out to determine the ability of these …
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Adsorption and photochemical transformation of polycyclic aromatic hydrocarbons on atmospheric water films
… as those of aerosols and fog. Naphthalene and phenanthrene were chosen as model PAHs for this study. Bulk water-air and air-to-interface partition constants of naphthalene and phenanthrene were estimated from the experiments based on the dependence of the equilibrium uptake on the water film …
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Bioremediation of petroleum hydrocarbons using microbial fuel cells
… systems. Biodegradation of target hydrocarbons, phenanthrene and benzene, was investigated in dual-chambered microbial fuel cells (MFCs) using different inoculum types - Shewanella oneidensis MR1 14063, Pseudomonas aeruginosa NCTC 10662, mixed cultures and their combinations thereof. All the …
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A method for using polyethylene passive samplers to measure polycyclic aromatic hydrocarbon chemical activity in sediments
… was tested using PEDs impregnated with dlO-phenanthrene and dlO-pyrene. First, PEDs were used to measure known concentrations of phenanthrene and fluoranthene in stirred seawaters. Seeing that the PEDs performed well, returning results which were within 25% of the known chemical activities, …
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Development of a hybrid electrokinetic system for the simultaneous removal of heavy metals and PAHs from clayey soil
… with lead (555 ppm), nickel (555 ppm) and phenanthrene (600 ppm), was subjected to simultaneous removal using an electrokinetic system. The electrokinetic surfactant supply system was applied to mobilize, transport and remove phenanthrene. A chelation agent (EDTA) was electrokinetically …
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Assessing the fate of PAHs in the Boston Inner Harbor using semipermeable membrane devices (SPMDs)
… in three locations of the Boston Inner Harbor: phenanthrene, methylphenanthrene's, fluoranthene, pyrene, benz(a)anthracene, and chrysene. The field measurements ranged from 0.61 to 90 ng/L for the various PAHs at the base of Tobin Bridge, the mouth of Chelsea River, and near the Logan Airport. A …
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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
… resonance spectroscopy. Sorption isotherms of phenanthrene to these fractions and bulk samples fitted with Freundlich models are nearly linear (N = 0.90--1.00), suggesting a partitioning-dominated mechanism which likely is attributed to the sorption contribution from asphalt and coal tar. No …
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