Simple First-Order Group Contribution Scheme for Solubilities of Solid Polycyclic Aromatic Hydrocarbons and Solid Polycyclic Aromatic Heterocycles in Pressurized Hot Water

2008 ◽  
Vol 47 (3) ◽  
pp. 620-626 ◽  
Author(s):  
Pavel Karásek ◽  
Josef Planeta ◽  
Michal Roth
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Group Contribution ◽  
Hot Water ◽  
First Order ◽  
Aromatic Heterocycles ◽  
Order Group ◽  
Polycyclic Aromatic

Stability of polycyclic aromatic hydrocarbons in pressurised hot water

The Analyst ◽  
2003 ◽  
Vol 128 (2) ◽  
pp. 150-155 ◽  
Author(s):  
Terhi Andersson ◽  
Kari Hartonen ◽  
Tuulia Hyötyläinen ◽  
Marja-Liisa Riekkola
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Hot Water ◽  
Polycyclic Aromatic

Degradation of polycyclic aromatic hydrocarbons and aromatic heterocycles by a Pseudomonas species

1988 ◽  
Vol 34 (10) ◽  
pp. 1135-1141 ◽  
Author(s):  
J. M. Foght ◽  
D. W. S. Westlake
Keyword(s):  
Gas Chromatography ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Capillary Gas Chromatography ◽  
Pseudomonas Sp ◽  
Aromatic Heterocycles ◽  
Wide Range ◽  
Pseudomonas Species ◽  
Polycyclic Aromatic ◽  
Cryptic Plasmids

Enrichment cultures were established with the aromatic fraction of a crude oil and screened for aromatic-degrading pseudomonads, using a sprayed plate technique. One isolate identified as Pseudomonas sp. HL7b was chosen for further study because it oxidized several polycyclic aromatic hydrocarbons and aromatic heterocycles without an apparent lag. Using capillary gas chromatography, spectrophotometry, and radiorespirometry, it was found to be capable of mineralizing and (or) oxidizing a wide range of polycyclic aromatic hydrocarbons, S-, N-, and O-heterocyclic analogues, and alkyl polycyclic aromatic hydrocarbons, but not aliphatic hydrocarbons. The isolate displayed two colonial morphologies which correlated with variation in degradative phenotype and hydrophobicity as measured by polystyrene adherence. Four cryptic plasmids were observed in both colonial types. Pseudomonas sp. HL7b degraded dibenzothiophene co-metabolically by a recognized pathway, but this degradation was constitutive, rather than inducible as reported for other bacteria.

scholarly journals Comparison of emissions from smokeless coal combustion in a household heating boiler used in Central Europe

2021 ◽  
Author(s):  
P. Knigawka ◽  
P. Pianko-Oprych ◽  
K. Krpec ◽  
L. Kuboňová
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Hot Water ◽  
Pollutant Emissions ◽  
Hard Coal ◽  
Composition Analysis ◽  
Particulate Emissions ◽  
Fuel Quality ◽  
Polycyclic Aromatic ◽  
The Impact

AbstractThe objective of this work was to evaluate the relationship between the fuel quality and the gaseous and particulate pollutant emissions generated from a hot-water boiler during the combustion of different types of innovative processed fuels: smokeless coal, smokeless briquettes 1–3, smokeless pellets and unprocessed hard coal. The aim of our research was to prove the presumption that smokeless processed coals produce less gaseous and particulate emissions. By using modern fuels in already used and manufactured older boilers, there is a possibility to significantly reduce emissions of organic gaseous compounds (OGC) and polycyclic aromatic hydrocarbons (PAHs). The emission situation in the heating season can be significantly improved even without costly production, and thus consumption of natural resources and energy, and installation of modern boilers. Physical and chemical characterization of solid-fuel samples, including determination of moisture content, ash, volatile organic content, calorific value and elemental composition analysis, were performed. Fuels were burned in one type of hot-water boiler class 1 according to EN 303-5 to determine the impact of applied fuel types on pollutant emissions. The pollutant emissions were characterized by the contents of gaseous components: nitrogen oxides NOx, sulfur dioxide SO2, carbon monoxide CO, carbon dioxide CO2, organic gaseous compounds OGC and particle components: total suspended particles TSP, particulate matter less than 2.5 µm and 10 µm (PM2.5 and PM10, respectively) and polycyclic aromatic hydrocarbons PAHs in both phases. The emission factors from six types of fuel were compared with applicable European standards. The lowest NOx content was observed for smokeless briquette 1, while the lowest SO2 content was observed for smokeless pellets. The emission of CO was at a similarly low level of 200 g/kg for smokeless briquette 1, smokeless briquette 2 and hard coal. Gaseous and pollutant emissions described by PM2.5 and TSP were observed to be the lowest for smokeless coal, smokeless briquette 1 and smokeless briquette 2.

Zero Valent Iron Particles for the Degradation of Polycyclic Aromatic Hydrocarbons in Contaminated Soil

2012 ◽  
Vol 587 ◽  
pp. 111-115 ◽  
Author(s):  
Salina Alias ◽  
Megawati Omar ◽  
Noor Hana Hussain ◽  
Suhaimi Abdul-Talib
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Contaminated Soil ◽  
Oxidative Degradation ◽  
Zero Valent Iron ◽  
Iron Particles ◽  
First Order ◽  
Degradation Rates ◽  
Rate Of Reaction ◽  
Polycyclic Aromatic

The removal of polycyclic aromatic hydrocarbons (PAHs) from contaminated soil through oxidative degradation by zero valent iron (ZVI) has been investigated in this study. The results showed a fast decrease of PAHs within the first 30 minutes of treatment followed by a slow degradation. The degradation rates coefficient (k) of PAHs analysed using pseudo first-order rate model showed the rate of reaction increased with the increase of ZVI concentrations from 0.003 min-1 at 1% ZVI concentration to 0.011 min-1 at 3% ZVI. However, the normalized surface area constant (kSA) decreased when the ZVI dosage above 3% was applied.

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