Revision as of 17:29, 7 January 2013

Polycyclic aromatic hydrocarbons (PAHs), also known as poly-aromatic hydrocarbons or polynuclear aromatic hydrocarbons, are potent atmospheric pollutants that consist of fused aromatic rings and do not contain heteroatoms or carry substituents. Naphthalene is the simplest example of a PAH. PAHs occur in oil, coal, and tar deposits, and are produced as byproducts of fuel burning (whether fossil fuel or biomass). As a pollutant, they are of concern because some compounds have been identified as carcinogenic, mutagenic, and teratogenic. PAHs are also found in cooked foods. Studies have shown that high levels of PAHs are found, for example, in meat cooked at high temperatures such as grilling or barbecuing, and in smoked fish. They are also found in the interstellar medium, in comets, and in meteorites and are a candidate molecule to act as a basis for the earliest forms of life. In graphene the PAH motif is extended to large 2D sheets

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  Benzo-a-pyrene

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  naphthalene

• PAHs 의 구조

wikipedia:http://en.wikipedia.org/wiki/Polycyclic_aromatic_hydrocarbon

Metabolism

Non - ligninolytic fungi

참고 Potential of Penicillium Species in the Bioremediation

Ligninolytic fungi(nutrient-limited)

Lignolytic fungi degrade PAHs trough non specific radical oxidation by Extracellular lignolytic enzymes.

• Extracellular lignolytic enzyme

• Lignin peroxidase
• Maganese-dependent peroxidase
• Manganese-independent peroxidase
• Laccase

Oxidation of polycyclic aromatic hydrocarbons by Ligninolytic fungi

reference :Fungal metabolism of polycyclic aromatic hydrocarbons: past, present and future applications in bioremediation

Known species

• Phanerochaete chrysosprium

• Trametes versicolor

Trametes versicolor

• Pleurotus ostreatus

Pleurotus ostreatus