Biotic degradation of airborne aerosol polycyclic aromatic hydrocarbons (PAHs) in temperate region mountainous snowfields

  • 54 Pages
  • 4.37 MB
  • English
Aerosols -- Measurement., Air -- Pollution -- Measurement., Polycyclic aromatic hydrocarbons -- Anal
Statementby James C. Boaz, II.
The Physical Object
Paginationviii, 54 leaves :
ID Numbers
Open LibraryOL13593515M

Polycyclic aromatic hydrocarbons (PAHs, also polyaromatic hydrocarbons or polynuclear aromatic hydrocarbons) are hydrocarbons—organic compounds containing Biotic degradation of airborne aerosol polycyclic aromatic hydrocarbons book carbon and hydrogen—that are composed of multiple aromatic rings (organic rings in which the electrons are delocalized).The simplest such chemicals are naphthalene, having two aromatic rings, and the three-ring compounds.

Polycyclic aromatic hydrocarbons, many of which are potent human carcinogens, occur widely in the environment as a result of incomplete combustion of organic matter. This volume was the first to review the chemical properties of these carcinogens and to relate their carcinogenic activity to their metabolic by-products within the by:   Influence of peanut oil on microbial degradation of polycyclic aromatic hydrocarbons.

Can. Microbiol. 49 – /w ; Pardieck D. L., Bouwer E. J., Stone A. Hydrogen-peroxide use to increase oxidant capacity for in situ bioremediation of contaminated soils and aquifers—a review.

Contam. by: Schützendübel et al. () studied the degradation of polycyclic aromatic hydrocarbons (PAHs) with P. ostreatus in liquid cultures for the duration of 7 weeks. It removed 43% and 60% of fluorene and anthracene after only 3 days of by: The occurrence of polycyclic aromatic hydrocarbons (PAH) in refinery effluents is of great concern globally due to its persistence, recalcitrance and carcinogenicity.

This study was aimed at bacterial degradation of polycyclic aromatic hydrocarbons (PAH) in untreated refinery effluent.

Contaminated soil samples were collected from Warri refinery jetty while water sample was collected from. Polycyclic Aromatic Hydrocarbons (PAHs) What Is the Biological Fate of the PAHs in the Body. Course: WB CE Original Date: July 1, CE Renewal Date: July 1, CE Expiration Date: July 1, Download Printer-Friendly version [PDF - KB].

Polycyclic aromatic hydrocarbons (PAHs) are aromatic hydrocarbons with two or more combined benzene rings in different conformations (Lawal, ), that do not contain heteroatoms or carry Author: Abdulazeez Lawal.

Polycyclic aromatic hydrocarbons (PAHs) are worldwide pollutants produced mainly during incomplete combustion and pyrolysis of organic substances. PAH derivatives are components with hydrogen on the aromatic ring substituted by carbonyl- nitro- and hydroxyl-functional groups (N-PAH, O-PAH or OH-PAH), or a group of heterocyclic PAHs containing one sulfur atom in place of a carbon Cited by: Polycyclic aromatic hydrocarbons (PAHs), as a group of widespread environmental organic pollutants, are involved in the development, triggering and pathologic changes of asthma.

Chapter Polycyclic aromatic hydrocarbons (PAHs) General description Polycyclic aromatic hydrocarbons (PAHs) are a large group of organic compounds with two or more fused aromatic rings.

They have a relatively low solubility in water, but are highly lipophilic. Most of the PAHs with low vapour pressure in the air are adsorbed on Size: KB. Current State of Knowledge in Microbial Degradation of Polycyclic Aromatic Hydrocarbons (PAHs): A Review.

Ghosal D(1), Ghosh S(2), Dutta TK(3), Ahn Y(4). Author information: (1)Environmental Engineering Laboratory, Department of Civil Engineering, Yeungnam University Gyeongsan, South by: 1. Introduction. Polycyclic aromatic hydrocarbons (PAHs) are a large group of chemicals with 2 to 7 fused aromatic rings (Arey and Atkinson,Di-Toro et al., ).Some PAHs are well known as carcinogens, mutagens, and teratogens and therefore pose a serious threat to the health and the well-being of humans (Boström et al., ).The physico-chemical properties of PAHs makes them highly Cited by: knowledge on polycyclic aromatic hydrocarbons (PAH) in ambient air and to Airborne PAH include substances which, when inhaled, are believed to produce lung cancer in humans.

The attention of the Working degradation rates in other media are generally lower than those in air, with BaP retention being greatest in the Size: KB. 20 Proceedings of the 10th Annual Conference on Hazardous Waste Research POLYCYCLIC AROMATIC HYDROCARBON BIODEGRADATION AS A FUNCTION OF OXYGEN TENSION IN CONTAMINATED SOIL C.J.

Hurst1, R.C. Sims1, J.L. Sims1, D.L. Sorensen1, J.E. McLean1 and S. Huling2, 1Division of Environmental Engineering, Department of Civil and Environmental Engineering, File Size: KB.

Understanding the impact of polycyclic aromatic hydrocarbons (PAHs) on soil environments is of increasingly important concern. Therefore, the microbial degradation of PAHs in soils has drawn considerable attention, but little is known about the PAH degradation genes in urban soils.

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In this study, we examined the diversity and abundance of the PAH degradation bacteria and evaluated Cited by: Novosphingobium pentaromativorans US, a marine bacterium isolated from muddy sediments of Ulsan Bay, Republic of Korea, was previously shown to be capable of degrading multiple polycyclic aromatic hydrocarbons (PAHs).

In order to gain insight into the characteristics of PAHs degradation, a proteome analysis of N. pentaromativorans US exposed to phenanthrene, pyrene, and. SUMMARY: Exposure to polycyclic aromatic hydrocarbons usually occurs by breathing air contaminated by wild fires or coal tar, or by eating foods that have been grilled.

PAHs have been found in at least of the 1, National Priorities List sites identified by the Environmental Protection Agency (EPA). This review, while touching on sources of polycyclic aromatic hydrocarbons (PAH's) and their degradation, emphasizes research that addresses their fate in the terrestrial environment.

Typical endogenous concentrations of PAH's in soil and vegetation range from 1 to 10 µ g/kg and from 10 to 20 µ g/kg, respectively. Polycyclic aromatic hydrocarbons (PAHs) In cities with coke ovens the concentration of airborne PAHs may reach nanograms per cubic meter of air (ng/m 3).

(The permissible workplace exposure limit for coke oven emissions isng/m 3.) Coal tar pitch and creosote, which are complex mixtures of liquid and solid aromatic hydrocarbons.

A Toxicological Profile for Polycyclic Aromatic Hydrocarbons was released in December This edition supersedes any previously released draft or final profile.

Toxicological profiles are revised and republished as necessary, but no less than once every three years. For information regarding the update status of previously released profiles.

Description Biotic degradation of airborne aerosol polycyclic aromatic hydrocarbons (PAHs) in temperate region mountainous snowfields PDF

This is an excellent book which I strongly recommend to every one involved with PAH. It cover the subject completely:nomenclature, synthetic methods old and new, theorethical aspects, spectroscopy properties (UV, IR, MS, fluoresce, X-rays, photoelectron spectra, among others)The properties of more than large polycyclic aromatic hydrocarbons LPAH are reviewed with emphasis in synthesis Cited by: Polycyclic Aromatic Hydrocarbons.

Polycyclic Aromatic Hydrocarbons (PAHs) include hundreds of different chemicals that commonly occur as mixtures in the environment.

Limited toxicological data are available on PAH mixtures; therefore, individual PAHs are typically evaluated as separate chemicals for risk characterization. Polycyclic aromatic hydrocarbons (PAHs) are by-products from burning gas, diesel, oil, coal, wood, and tobacco, among other substances.

PAHs contain several carbon and hydrogen rings that are linked together. An example of the chemical structure of Naphthalene (a PAH) is shown.

Polycyclic aromatic hydrocarbons (PAHs) are a group of over hazardous substances. They are so common in industrial processes that they are present in at least of the 1, National Priorities list compiled by the Environmental Protection Agency. Nitrated polycyclic aromatic hydrocarbons (N-PAHs) are an important category of derivations of PAHs and are of special interest because they include potential mutagens and carcinogens.

They have been recognized as direct-acting mutagens and carcinogens to mammalian systems and are, thus, considered to have far greater toxicity than Cited by: Polycyclic aromatic hydrocarbons – problem chemicals.

4 2. Where do PAHs come from. 4 3. Why are PAHs such a concern. 6 4. The path of PAHs into the environment and to the consumer 7 5.

Which products may contain PAHs. 11 6. What legislation is in place with respect to PAHs. 14 7. A German initiative: restricted use of PAHs in rubber and File Size: 1MB. Polycyclic aromatic hydrocarbons (PAHs) have attracted the interest of many scientists from different disciplines beyond biology, physics and chemistry.

They are fascinating compounds due to their universality, their presence in interstellar space (Tielens ) and their ubiquitous distribution in earth ecosystems (Vila, Tauler and Grifoll Cited by: 1.

POLYCYCLIC AROMATIC HYDROCARBONS – PROBLEM CHEMICALS. Whether in mouse pads, toys, or bathing shoes – polycyclic aromatic hydrocarbons (PAHs) are ubiquitous. Most frequently, non-branded products at affordable prices get negative attention in this respect, but pro-ducts from renowned companies may contain PAHs as Size: KB.

An aromatic hydrocarbon or arene (or sometimes aryl hydrocarbon) is a hydrocarbon with sigma bonds and delocalized pi electrons between carbon atoms forming a circle.

In contrast, aliphatic hydrocarbons lack this delocalization.

Details Biotic degradation of airborne aerosol polycyclic aromatic hydrocarbons (PAHs) in temperate region mountainous snowfields PDF

The term "aromatic" was assigned before the physical mechanism determining aromaticity was discovered, and referred simply to the fact that many such compounds have a. Unfortunately, this book can't be printed from the OpenBook. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.

Polycyclic Aromatic Hydrocarbons: 15 Listings Reasonably anticipated to be human carcinogens Also known as PAHs or polynuclear aromatic hydrocarbons The term “polycyclic aromatic hydrocarbon” (PAH) commonly refers to a large class of organic compounds that contain carbon and hydro­ gen and consist of two or more fused aromatic Size: KB.Polycyclic aromatic hydrocarbons (PAHs) are emitted into the Canadian environment from both natural and anthropogenic sources.

Forest fires are the single most important natural source of PAHs in Canada. However, since releases from that source are generally widely separated in time and space across the country, they do not result in continuous exposure in any specific area.The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.

Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.