Готові списки джерел за темами / Polyaromatic hydrocarbones

Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій
Звіти організацій

Добірка наукової літератури з теми "Polyaromatic hydrocarbones"

Автор: Grafiati

Опубліковано: 11 березня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Polyaromatic hydrocarbones".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Polyaromatic hydrocarbones"

Nagy, E., J. H. Carey, and J. H. Hart. "Hydrocarbons in St. Clair River Sediments." Water Quality Research Journal 21, no. 3 (August 1, 1986): 390–97. http://dx.doi.org/10.2166/wqrj.1986.034.

Повний текст джерела

Анотація:

Abstract A survey of St. Clair River sediments at Sarnia, Ontario, showed that the highest concentrations of normal alkanes and polyaromatic hydrocarbons occurred in the vicinity of the petrochemical industrial area on the Canadian side of the river. The absence of an odd-carbon predominance in the alkanes, and the presence of several alkylated polyaromatics indicate a petroleum source for both classes of hydrocarbons. Both classes of compounds were present, at increased concentrations, in the lower sections of two shallow cores. The distribution of organics reflected the highly localized character of inputs, currents, and sediments.

Стилі APA, Harvard, Vancouver, ISO та ін.

Sudiana, I. M., I. Idris, T. P. Napitupulu, A. Z. N. Ikhwani, I. N. Sumerta, A. Sugiharto, T. R. Sulistiyani, et al. "Diversity of hydrocarbon-degrading bacteria in Pulau Pari and their potential roles for bioremediation." IOP Conference Series: Earth and Environmental Science 950, no. 1 (January 1, 2022): 012013. http://dx.doi.org/10.1088/1755-1315/950/1/012013.

Повний текст джерела

Анотація:

Abstract Oil spill accidents occur several times in the Indonesian sea, including Jakarta Bay. Studies on the application of oil spill bio-degradation techniques need to be developed but require baseline data on microbe species diversity and functions. We isolated several bacteria from Pulau Pari that can degrade hydrocarbons (hexadecane, phenantrene, and dibenzothiophene) by using two step enrichment culture technique. The isolated microbes belong to several taxa, including α-subclass Proteobacteria, β-subclass Proteobacteria, γ-subclass Proteobacteria, the gram-positive high GC content (Actinobacteria), and Bacillus group. These marine bacteria degrade not only alkanes but also polyaromatic hydrocarbons (phenanthrene and dibenzothiophene). Alpha and gamma Proteobacteria were predominant alkane and polyaromatic hydrocarbons-degrading bacteria. The ability of those bacteria to degrade both alkanes and polyaromatic hydrocarbon is a key-important trait for enhancing bioremediation of oil spills.

Стилі APA, Harvard, Vancouver, ISO та ін.

Salari, Marjan, Vahid Rahmanian, Seyyed Alireza Hashemi, Wei-Hung Chiang, Chin Wei Lai, Seyyed Mojtaba Mousavi, and Ahmad Gholami. "Bioremediation Treatment of Polyaromatic Hydrocarbons for Environmental Sustainability." Water 14, no. 23 (December 6, 2022): 3980. http://dx.doi.org/10.3390/w14233980.

Повний текст джерела

Анотація:

Polycyclic aromatic hydrocarbons (PAHs) distributed in air and soil are harmful because of their carcinogenicity, mutagenicity, and teratogenicity. Biodegradation is an environmentally friendly and economical approach to control these types of contaminants and has become an essential method for remediating environments contaminated with petroleum hydrocarbons. The bacteria are isolated and identified using a mineral nutrient medium containing PAHs as the sole source of carbon and energy and biochemical differential tests. Thus, this study focuses on some bacteria and fungi that degrade oil and hydrocarbons. This study provides a comprehensive, up-to-date, and efficient overview of petroleum hydrocarbon contaminant bioremediation considering hydrocarbon modification by microorganisms, emphasizing the new knowledge gained in recent years. The study shows that petroleum hydrocarbon contaminants are acceptably biodegradable by some microorganisms, and their removal by this method is cost-effective. Moreover, microbial biodegradation of petroleum hydrocarbon contaminants utilizes the enzymatic catalytic activities of microorganisms and increases the degradation of pollutants several times compared to conventional methods. Biological treatment is carried out in two ways: microbial stimulation and microbial propagation. In the first method, the growth of indigenous microorganisms in the area increases, and the pollution is eliminated. In the second method, on the other hand, there are no effective microorganisms in the area, so these microorganisms are added to the environment.

Стилі APA, Harvard, Vancouver, ISO та ін.

KHAVRYUCHENKO, VOLODYMYR D., YURIJ A. TARASENKO, VOLODYMYR V. STRELKO, OLEKSIY V. KHAVRYUCHENKO, and VLADYSLAV V. LISNYAK. "INTERACTION OF THE DIOXYGEN MOLECULE WITH THE C96H24 POLYAROMATIC HYDROCARBON CLUSTER: A QUANTUM CHEMICAL INSIGHT." International Journal of Modern Physics B 22, no. 13 (May 20, 2008): 2115–27. http://dx.doi.org/10.1142/s0217979208039289.

Повний текст джерела

Анотація:

Interaction of the previously described [V. D. Khavryuchenko, Y. A. Tarasenko, V. V. Strelko, O. V. Khavryuchenko and V. V. Lisnyak, Quantum chemical study of polyaromatic hydrocarbons in high multiplicity states, Int. J. Modern. Phys. B21, 4507 (2007), in press] polyaromatic hydrocarbon (PAH) C 96 H 24 with dioxygen molecule and KO2 have been quantum chemically examined. The probability of existence of the oxygen superoxide ion-radical O 2 adsorbed on the surface of the PAH is critically discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhou, Guo Qiang, Wei Kun Yao, Yu Jue Wang, Yu Feng, Yan Qing Yu, and Wei Wang. "Production of Renewable Petrochemicals from Catalytic Co-Pyrolysis of Beech Wood and Low-Density Polyethylene with Mesoporous Bifunctional ZSM-5 Zeolites." Applied Mechanics and Materials 768 (June 2015): 392–401. http://dx.doi.org/10.4028/www.scientific.net/amm.768.392.

Повний текст джерела

Анотація:

This study investigated catalytic fast pyrolysis (CFP) of beech wood, low-density polyethylene (LDPE), and their mixture (mass ratio of 1) with a conventional microporous ZSM-5 and mesoporous bifunctional Zn/ZSM-5meso zeolite prepared by desilication of the conventional ZSM-5 with NaOH solution and then impregnation with Zn.The generation of mesopores by desilication improved the diffusion property of the zeolite, which decreased the formation of undesired polyaromatic hydrocarbons from secondary polymerization reactions of monoaromatics in CFP. In addition, the impregnation of Zn increased the dehydrogenation activity of the zeolites, and thus enhanced the conversion of low-value alkanes to valuable olefins. As a result, Zn/ZSM-5meso produced higher yields (56.0 C%) of valuable petrochemicals (monoaromatic hydrocarbons and olefins) and lower yields of undesired polyaromatics (1.70 C%) and alkanes (10.2 C%) in co-feed CFP of the beech wood and LDPE mixture than ZSM-5 (48.2 C%, 4.18 C%, and 18.7 C% for petrochemicals, polyaromatics, and alkanes, respectively).ZSM-5 desilication and impregnation with Zn thus have a beneficial effect on improve the product distribution in CFP of biomass and plastic mixtures. In addition, the results suggest that CFP may provide a promising technology for producing renewable petrochemicals from municipal and agricultural solid wastes, which usually contain high contents of biomass and waste plastics.

Стилі APA, Harvard, Vancouver, ISO та ін.

Pevneva, G. S., N. G. Voronetskaya, and N. N. Sviridenko. "Composition of Hydrocarbons in Maltenes from Naphthenic Crude Oil after Cracking with WC/NI–CR Additive." Chemistry and Technology of Fuels and Oils 629, no. 1 (2022): 34–40. http://dx.doi.org/10.32935/0023-1169-2022-629-1-34-40.

Повний текст джерела

Анотація:

Using GCMS the composition of hydrocarbons in maltenes from heavy naphthenic crude oil (Usa oilfield) after cracking in the presence of WC/Ni–Cr additive and without it has been studied. Cracking of maltenes carried out at 450°С within 2 hours in isothermal mode. Using WC/Ni–Cr additive during cracking contributes to the deepening of the destruction reactions in hydrocarbons and resins. It is shown, the content of low-molecular alkanes С11–С19, alkylbenzenes С9–С10 increases essentially in the maltenes cracked with the additive while that of cyclohexanes and bicyclanes decreases, tri-, tetra- and pentacyclic saturated hydrocarbons destruct completely as compared with maltenes cracked without the additive. There are changes in the composition of naphthenic hydrocarbons. The reactions of condensation occur along with destruction reactions, leading to the formation of polyaromatic hydrocarbon.

Стилі APA, Harvard, Vancouver, ISO та ін.

Bezhan, A. D., A. S. Skripnik, A. A. Dudnik, and V. B. Kolycheva. "Method for determination the qualitative composition of polyaromatic hydrocarbons in commercial petroleum products." ТЕНДЕНЦИИ РАЗВИТИЯ НАУКИ И ОБРАЗОВАНИЯ 84, no. 2 (2022): 90–93. http://dx.doi.org/10.18411/trnio-04-2022-69.

Повний текст джерела

Анотація:

The article considers one of the methods for express determination of the qualitative composition of polyaromatic hydrocarbons in petroleum products. The identified polyaromatic hydrocarbons with the Lee retention index from 200 to 400, their calculated and experimentally determined retention times, as well as the relative standard deviation of the times are presented.

Стилі APA, Harvard, Vancouver, ISO та ін.

Akomah-Abadaike, O. N., and O. B. Iwuji. "Comparative studies on Polyaromatic Hydrocarbons (PAHS) in some edible oil (shea butter, coconut oil and palm kernel oil) sold in Nigeria." Scientia Africana 20, no. 1 (April 23, 2021): 49–56. http://dx.doi.org/10.4314/sa.v20i1.4.

Повний текст джерела

Анотація:

Polyaromatic hydrocarbons (PAHs) are ever-present lipophilic substances, having varying levels of concentration in edible oils. Shea butter, coconut oil and palm kernel oil are used in Africa as component of traditional ointment. The study evaluated the concentration of polyaromatic hydrocarbons in Shea butter, coconut oil and palm kernel oil using gas chromatography with flame ionization detector. The polyaromatic hydrocarbons identified and quantified are: napthalene, acenaphthene, fluorene, phenapthrene, fluoranthene, pyrene, chrysene for Shea butter samples; napthalene, acenaphthene, phenanthrene, anthracene, pyrene for coconut oil samples while palm kernel oil samples have napthalene, acenaphthene, acenaphthylene,fluorene, phenanthrene, fluoranthene, pyrene, benzo(a)anthracene, chrysene, benzo(b)fluoranthene and benzo(k)fluoranthene, The concentration of the sum of PAHs of Shea butter ranged from 7.63 - 44.71 ppm, coconut oil samples 7.81 - 19.24 ppm and palm kernel oil samples 25.09 - 71.55 ppm. Shea butter, coconut oil and palm kernel oil samples have concentration of benzo(a)pyrene above the set maximum permissible limit as revealed in the study. It is important that further research on the reduction and/or elimination of PAHs in Shea butter, coconut oil and palm kernel oil be developed. Keywords: Edible oil, Polyaromatic hydrocarbons, Benzo(a)pyrene, Carcinogenic, Medicinal

Стилі APA, Harvard, Vancouver, ISO та ін.

Golounin, A. V., E. N. Marakushina, and S. A. Khramenko. "Polycondensation of polyaromatic hydrocarbons." Coke and Chemistry 52, no. 11 (November 2009): 501–3. http://dx.doi.org/10.3103/s1068364x09110088.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Martin, Colin J., Sarath D. Perera, and Sylvia M. Draper. "Thiophene Containing Polyaromatic Hydrocarbons." Advances in Science and Technology 54 (September 2008): 120–22. http://dx.doi.org/10.4028/www.scientific.net/ast.54.120.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Polyaromatic hydrocarbones"

Mistry, Anish. "Non-Kekulé polyaromatic hydrocarbons." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/88089/.

Повний текст джерела

Анотація:

Non-Kekulé PAHs have been studied for a variety of applications due to the interesting chemistry they possess for such simple organic molecules. PAHs can have both closed and open-shell arrangements which have been of interest recently due to the potential magnetic and electronic properties they can acquire. Due to this, there has recently been a strong interest in graphene which can be viewed as a sheet of PAHs fused together. This thesis describes the formation of particular PAHs including open-shell compounds and how PAHs can be fully characterised using one technique. Chapter 2 describes the synthesis of 6H-benzo[cd]pyrene, the starting point of this project. Pentacene and perylene are other five fused ring structures like 6H-benzo[cd]pyrene which are commonly used due to their fluorescence, thus, this PAH could have interesting properties for material scientists. The production of the benzo[cd]pyrene radical by AFM/STM is then described. Chapter 3 describes peri-condensation reactions to form larger PAHs a technique which was commonly used in the 1900s for the addition of an aromatic ring, however, multiple ring additions have been reported to occur. In addition, carbon labelling experiments have been completed to confirm this and the mechanism by which multiple rings add have been discussed. STM/AFM has been used to characterise the compounds formed in the peri-condensation reactions as common techniques for characterisation do not provide enough structural data for compound determination. Chapter 4 discusses the synthesis of 3,8-dihydro-3H,8H-dibenzo[cd,mn]pyrene. Thereafter the use of AFM/STM is then utilised to dehydrogenate 3,8-dihydro-3H,8H-dibenzo[cd,mn]pyrene to form the non-Kekulé structure of triangulene which was simultaneously imaged for the first time.

Стилі APA, Harvard, Vancouver, ISO та ін.

Wang, Cong. "Synthesis of Polyaromatic Hydrocarbons via Mechanochemistry." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563525733261563.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Riaz, Ihsan. "Bioremediation treatments for polyaromatic hydrocarbons contaminated soil." Thesis, Glasgow Caledonian University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251186.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Gazdošová, Lucie. "Studium chemického složení atmosférických aerosolů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216356.

Повний текст джерела

Анотація:

Atmospheric aerosols play an important role in various atmospheric issues (effect to the radiation budget of the atmosphere, visibility reduction, smog production, destruction of stratospheric ozone, …). Epidemiological studies proved a correlation between increased mortality and high concentration of ambient particulate matter. Over the past decade, a growing attention has been focused on the organic compounds that are constituents of aerosol particles. Although organic compounds comprise often up to 60% of the total aerosol mass, their composition, concentration and formation mechanisms are not well understood. Diploma thesis will deal with the study of chemical composition of organic compounds bound to atmospheric aerosols with focus on polyaromatic hydrocarbons and sugars. Atmospheric aerosols will be sampled on filters and filter extracts will be analysed for content of studied organic compounds by means of GC, GC-MS or LC, respectively. Development and optimalization of extraction methods (PSE, …) and detection of compounds of interest. Concentration of studied organic compounds in aerosol size fractions PM 10, PM 2.5 and PM 1 will be compared.

Стилі APA, Harvard, Vancouver, ISO та ін.

Yuan, Tao 1968. "Remediation of a soil contaminated with polyaromatic hydrocarbons (PAHs)." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111845.

Повний текст джерела

Анотація:

Sites contaminated with polyaromatic hydrocarbons (PAHs) pose serious health and safety risks to the surrounding environment due to their toxicity, persistence and accumulation in the environment. Because certain members of this class have been demonstrated to be both carcinogenic and mutagenic, PAHs are considered as environmental priority pollutants (US EPA). The studies in this thesis provide an efficient, economical and environmentally benign technique for the remediation of PAH contaminated soil/sediment by means of PAH mobilization with surfactant followed with a catalytic hydrogenation in supercritical carbon dioxide (scCO2).
Catalytic hydrogenation of naphthalene, acenaphthylene, ancenaphthene, anthracene, phenanthrene, chrysene and benzo[a]pyrene over alumina supported palladium (5% Pd0/gammaAl2O3) commercial catalyst were investigated in either a batch reaction mode or a continuous reaction system in H2-scCO2 (∼5% v/v). The hydrocarbon compounds were efficiently reduced to their corresponding fully saturated polycyclic hydrocarbon homologs with mild conditions of temperature (90°C) and pressure (60 psi H2 or 3000 psi H2-scCO2). The bacterial reverse mutation assay demonstrated that both the fully and partially hydrogenated products of chrysene and benzo[a]pyrene were devoid of mutagenic activity.
A laboratory study was conducted on the surfactant-assisted mobilization of PAH compounds combined with reagent regeneration and detoxification steps to generate innocuous products. Five minutes of ultrasonication of field contaminated soil with a 3% (w/v) surfactant suspension mobilized appreciable quantities of all PAH compounds. Formulating the Brij 98 surfactant in 0.1 M phosphate buffer (pH 8.0) mobilized the largest quantities of PAH compounds and the recovery of surfactant (>90%) but soil residues exceeded permissible maxima for five- and six-ring analytes. Five successive washes were required to reduce the residual fraction to permissible levels. The mobilized PAH compounds were then detoxified at line by catalytic hydrogenation in a 5% H2-scCO2 (v/v) atmosphere.
New palladium hydrogenation catalysts were fabricated in the laboratory with specific processes on various supports. The hydrogenation of phenanthrene and benzo[a]pyrene in a fixed bed micro reactor demonstrated that the catalyst that was fabricated from organosoluble precursor loaded on aluminum oxide (2.5% Pd0/gammaAl2O3) was four times more efficient than the commercial catalyst that was used for PAH hydrogenations.

Стилі APA, Harvard, Vancouver, ISO та ін.

Sundqvist, Björn. "POLYAROMATIC HYDROCARBONS IN HYDROCHARS : HYDROTHERMAL CARBONIZATION OF SEWAGE SLUDGE." Thesis, Umeå universitet, Kemiska institutionen, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185521.

Повний текст джерела

Анотація:

Sewage sludge is an inevitable by-product from waste water treatment plants. Sludgemanagement is a difficult task since sludge has a high moisture content, poordewaterability and generally contain heavy metals, pharmaceutical residues,polyfluorinated alkyl substances (PFAS) and organic pollutants. Recentlyhydrothermal carbonization (HTC) has been getting attention for its suitability to treatsewage sludge. HTC is a flexible process which can handle feedstocks with highmoisture content. The process stabilizes the organic content in a solid residue calledhydrochar which has an increased energy content and decreased moisture contentcompared to the starting material. Hydrochar can be used as soil amendment materialsince it has a good nutrient content and can prevent leaching of fertilizers. However,there is a concern for the risk of high levels of poly aromatic hydrocarbons (PAHs) inthe hydrochar which might limit its applicability in soil applications. PAHs are acomplex group of organic pollutants that can be toxic and even cancerogenic tohumans. 16 PAHs have been described as priority pollutants by the US EnvironmentalProtection Agency due to their toxicity and risk for human exposure. In this studyHTC was performed, with municipal sewage sludge as feedstock, at different processconditions to investigate its influence on the PAH content in the produced hydrocharsand aqueous residues. Ten experiments were performed with varying reactiontemperature (ranging from 180 °C to 260 °C fixed at 1 h residence time) and varyingresidence time (ranging from 1 h to 5 h fixed at 200 °C and 260 °C). The PAH contentof the products was analysed using GC/MS. The hydrochars suitability for soil amendment was investigated. At a 1.7wt.%amendment level (approximately 60 tons/hectare) the results showed that the PAHcontribution from the hydrochars to the soil was well below the SwedishEnvironmental Protection Agency (SEPA) contamination guidelines. No significantPAH content in the products, that might limit the hydrochars applicability for landusages, was observed. The content of the 16 priority PAHs (PAH 16) in thehydrochars were below the international biochar (IBI) limit (6mg/kg TS) and theEuropean Biochar Certificate (EBC) EBC-Agro limit (6mg/kg TS). The PAH contentof the filtrates where below the Swedish Petroleum institute (SPI) irrigationguidelines, except for the filtrate produced at 260 °C, 5 h. In the raw material no PAHspecies was found, however, the reporting limit was higher compared to thehydrochars. Overall, the content of PAH was lower in the filtrates compared to thehydrochar, e.g. at 200 °C, 1 h the content PAH M were 0.05 and 0.85 mg/kg sludgeTS for the filtrate and hydrochar respectively. This was expected since PAHsgenerally has a low solubility in water. To assess the toxicity of the hydrochars thetoxic equivalent quantity (TEQ) was used. The TEQ for the hydrochars wereapproximately ~0.0 to 0.68 mg/kg TS which is below the IBI limit level at 3.0 mg/kgTS. Temperatures around 200 °C to 220° C were found to be favourable in terms ofPAH content in the hydrochar, at 220 °C and 1 h the sum of PAH16 is lower than forall other samples, for both the hydrochar and the filtrate (<R.L and 0.01mg/kg sludgeTS for the hydrochar and filtrate respectively). No significant correlation betweenresidence time and PAH content was observed, except at 260 °C where the PAH16content increased significantly in the filtrates between 1 h and 5 h residence time(0.05 to 0.85 mg/kg sludge TS). In conclusion, HTC was found to be a promisingprocess for utilizing sewage sludge and the results indicates that the risk of high levelsof PAH content of the hydrochars are relatively low.

Стилі APA, Harvard, Vancouver, ISO та ін.

Roberson, Luke Bennett. "Ultrapurification and deposition of polyaromatic hydrocarbons for field effect transistors." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/30950.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Miller, David J. "Effect of oil age on polyaromatic hydrocarbon emissions from automobiles." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101130.

Повний текст джерела

Анотація:

Automobiles are known to emit polyaromatic hydrocarbons. The literature indicates that the emission levels of these compounds are correlated with oil age, and it has been hypothesized that entry of oil into the combustion chamber is a major cause of these emissions. This experiment investigated the relationship between oil age and these polyaromatic hydrocarbon emissions. It was found that the three polyaromatics of interest seem to be emitted inconsistently and irregularly. It is possible that this was due to a buildup on the combustion chamber walls of these compounds: polyaromatics are formed in the quench layer near these walls and can accumulate there until dynamic equilibrium is reached. This may not have been reached at the time of the investigation since the engine was relatively new. This would be of interest for future investigations.
M.S.

Стилі APA, Harvard, Vancouver, ISO та ін.

Crosswell, Scott Brownlee. "Effects of Grasses on the Remediation of Creosote-Contaminated Surface Soil." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/42643.

Повний текст джерела

Анотація:

A grass phytoremediation field study was initiated in July 1997 at the 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 PAH remediation in fertilized plots that were unplanted or seeded with clover, fescue or rye. Samples were collected from a depth of 15 to 21 cm, and the six most prevalent PAHs, acenaphthene, fluorene, phenanthrene, fluoranthene, pyrene and chrysene were quantified. Data from four sampling periods, t=0, 9, 12 and 17 months is presented. At t=9 months, substantial loss of the five lowest molecular weight (LMW) PAHs had occurred, and the loss was attributed to natural attenuation. During the first 9 months, below average precipitation at the site delayed grass root development. Between t=9 and 12 months, above average precipitation was recorded and this appeared to accelerate chrysene removal rates in both the unplanted and planted cells; however, the rate was higher rate in the planted cells. Similarly, fluoranthene and pyrene degradation seemed to be enhanced in the fescue and rye cells. Over the last 8 months of the study, acenaphthene, fluorene and phenanthrene concentrations approached constant, minimum levels suggesting additional removal will be limited. PAH compounds with higher solubility correlated to decreased constituent soil concentrations. Additional sampling was initiated at t=17 months to compare PAH concentrations with depth. This was done because the observed root mass changed significantly with depth. Samples were taken at two additional depths 10 to 15 and 32 to 38 cm. Increased removal of fluoranthene and pyrene was observed in the uppermost zone, suggesting a role for plants in remediation of these 4 ringed PAHs.
Master of Science

Стилі APA, Harvard, Vancouver, ISO та ін.

Pritchett, Blair. "Mutagenic and genotoxic potential of nitrated polyaromatic hydrocarbons in combustion byproduct mixtures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0021/MQ55538.pdf.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Книги з теми "Polyaromatic hydrocarbones"

Canada. Inland Waters Directorate. Ontario Region. Water Quality Branch. Organochlorines and polyaromatic hydrocarbons in the St. Lawrence River at Wolfe Island, 1982-84. Burlington, Ont: Environment Canada, Inland Waters / Lands Directorate, Ontario Region, Water Quality Branch, 1987.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Waters, Canada Dept of the Environment Inland. Organochlorines and Polyaromatic Hydrocarbons in the st. Lawrence River at Wolfe Island, 1982/84. S.l: s.n, 1987.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Duiser, J. A. Emissions into the atmosphere of polyaromatic hydrocarbons, polychlorinated biphenyls, lindane and hexachlorobenzene in europe. Apeldoorn, Netherlands: TNO, 1989.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Kirsch, Barbara A. The development of a laser-induced fluorescence method for rapid screening of polyaromatic hydrocarbons. 1986.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Gillen, Carrie Lea. Polyaromatic hydrocarbon remediation enhancements and their effect on heterotrophic and degrader populations. 2001.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Частини книг з теми "Polyaromatic hydrocarbones"

Agteren, Martin H., Sytze Keuning, and Dick B. Janssen. "Polyaromatic hydrocarbons (PAHs)." In Environment & Chemistry, 287–349. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9062-4_5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Martin, Colin J., Sarath D. Perera, and Sylvia M. Draper. "Thiophene Containing Polyaromatic Hydrocarbons." In Advances in Science and Technology, 120–22. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908158-11-7.120.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Kadri, Tayssir, Agnieszka Cuprys, Tarek Rouissi, and Satinder Kaur Brar. "Microbial Degradation of Polyaromatic Hydrocarbons." In Microorganisms for Sustainability, 101–17. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7904-8_5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Sánchez, Nazly E., Alicia Callejas, Jesús Salafranca, Ángela Millera, Rafael Bilbao, and María U. Alzueta. "Formation and Characterization of Polyaromatic Hydrocarbons." In Cleaner Combustion, 283–302. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5307-8_11.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Filatov, Alexander S., and Marina A. Petrukhina. "Coordination Preferences of Bowl-Shaped Polyaromatic Hydrocarbons." In Fragments of Fullerenes and Carbon Nanotubes, 157–85. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118011263.ch6.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Keller, Rudolf. "Polyaromatic Hydrocarbons and the Condensation of Carbon in Stellar Winds." In Polycyclic Aromatic Hydrocarbons and Astrophysics, 387–97. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-4776-4_37.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Jacquot de Rouville, Henri-Pierre, Romain Garbage, Agnès M. Sirven, Claire Kammerer, and Gwénaël Rapenne. "Triptycene or Subphthalocyanine Wheels and Polyaromatic Hydrocarbon Nanovehicles." In Single Molecular Machines and Motors, 65–79. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13872-5_4.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bhatia, Simran, Moyna Kalia, and Baljinder Singh. "Bioremediation of Polyaromatic Hydrocarbons: Current Status and Recent Advances." In Phytobiont and Ecosystem Restitution, 275–93. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1187-1_15.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Andrésen, John M., Yinzhi Zhang, and M. Mercedes Maroto-Valer. "Reducing Emissions of Polyaromatic Hydrocarbons from Coal Tar Pitches." In Environmental Challenges and Greenhouse Gas Control for Fossil Fuel Utilization in the 21st Century, 59–72. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0773-4_5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Masila, Miriam M., and Omowunmi A. Sadik. "Electronic Nose for the Detection of Organochlorines and Polyaromatic Hydrocarbons." In Chemical and Biological Sensors for Environmental Monitoring, 37–59. Washington, DC: American Chemical Society, 2000. http://dx.doi.org/10.1021/bk-2000-0762.ch004.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Polyaromatic hydrocarbones"

Swift, G. Peter, Natalia Kaliteevskaya, Karen L. Johnson, J. Martyn Chamberlain, and Andrew J. Gallant. "Terahertz spectroscopy of polyaromatic hydrocarbons." In 2010 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010). IEEE, 2010. http://dx.doi.org/10.1109/icimw.2010.5612610.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Savchenkova, A. S., A. S. Semenikhin, I. V. Chechet, S. G. Matveev, M. Frenklach, and A. M. Mebel. "DIMERIZATION OF POLYAROMATIC HYDROCARBON MOLECULES WITH FORMATION OF E-BRIDGE BOND: A THEORETICAL STUDY." In 9TH INTERNATIONAL SYMPOSIUM ON NONEQUILIBRIUM PROCESSES, PLASMA, COMBUSTION, AND ATMOSPHERIC PHENOMENA. TORUS PRESS, 2020. http://dx.doi.org/10.30826/nepcap9a-13.

Повний текст джерела

Анотація:

In combustion engines and other fuel-burning devices, during the combustion of hydrocarbon fuels at a temperature of 1000-1400 K, soot is actively formed, deposited on the cold surfaces of the devices, which reduces their service life. At present, much attention is paid to the problems of controlling the amount and size of soot particles formed during combustion. However, the mechanism of soot formation has not yet been fully understood. It is assumed that under combustion conditions, young soot particles are formed by nucleation of aromatic and polyaromatic hydrocarbons (PAHs) with subsequent growth of particles due to the addition of new molecules.

Стилі APA, Harvard, Vancouver, ISO та ін.

Kerr, J. M., H. R. Melton, S. J. McMillen, R. I. Magaw, and G. Naughton. "Polyaromatic Hydrocarbon Content in Crude Oils Around the World." In SPE/EPA Exploration and Production Environmental Conference. Society of Petroleum Engineers, 1999. http://dx.doi.org/10.2118/52724-ms.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Picciolo, Lisa C., Hideyuki Murata, and Zakya H. Kafafi. "Derivatives of polyaromatic hydrocarbons as red emitters in organic light-emitting diodes." In International Symposium on Optical Science and Technology, edited by Zakya H. Kafafi. SPIE, 2001. http://dx.doi.org/10.1117/12.416929.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Nguyen, Jim, Crissini M. Sison, Varenka Lorenzi, Pitiporn Asvapathanagul, and Nhut M. Pham. "Monitoring Organochlorine Pesticides, Polychlorinated Biphenyls, and Polyaromatic Hydrocarbons in Wastewater and Groundwater." In World Environmental and Water Resources Congress 2017. Reston, VA: American Society of Civil Engineers, 2017. http://dx.doi.org/10.1061/9780784480618.018.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Adamec, Vladimir. "ASSESSMENT OF POLYAROMATIC HYDROCARBONS IN THE SURFACE SOILS OF AN URBAN AREA." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. STEF92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018v/4.3/s06.023.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Takada, Tomonori, Hiroshi Ikezawa, and Yasuhiro Kotani. "Determination of Polyaromatic Hydrocarbons in Particulate Matter with HPLC and 3D-Detector." In Automotive and Transportation Technology Congress and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-3318.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Romanov, A., N. Bezuglova, G. Zinchenko, A. Kovrigin, V. Pavlov, D. Troshkin, I. Khvostov, et al. "Accumulation of the polyaromatic hydrocarbons in a snow cover of altai settlements." In 2011 International Conference on Multimedia Technology (ICMT). IEEE, 2011. http://dx.doi.org/10.1109/icmt.2011.6002382.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Rowberg, K. L., and J. T. Smith. "Analysis of polyaromatic hydrocarbon (PAH) contaminated riparian sediment and source identification." In RIVER BASIN MANAGEMENT 2007. Southampton, UK: WIT Press, 2007. http://dx.doi.org/10.2495/rm070471.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Oriaku, T. O. "The Effect of Biochar on Residual Polyaromatic Hydrocarbon Concentrations in Bioremediation." In SPE Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/193399-ms.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "Polyaromatic hydrocarbones"

Koyama, Hiroyuki, Hirotaka Kanno, and Yasunori Iwakiri. Examination About Availability of Rapid Analysis Methodology of Polyaromatic Hydrocarbons (PAHs) in Automotive Exhaust Emissions. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0660.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Evaluation of fire debris cleanup employees' exposure to silica, asbestos, metals, and polyaromatic hydrocarbons. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, August 2019. http://dx.doi.org/10.26616/nioshhhe201800943355.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!