PAHs polycyclic aromatic

PAH Polycyclic Aromatic Hydrocarbons, (rarely used as abbreviation for polyaluminum hydroxide)... 

Wise SA, Sander LC, Schantz MM, Hays MJ, and Benner BA Jr. 2000) Recertification of standard reference material (SRM) 1649, urban dust, for the determination of polycyclic aromatic hydrocarbons (PAHs). Polycyclic Aromat Compd, 13 419-456. 

Baumard, R Budzinski, H. Garrigues, R Sorbe, J.C. Burgeot, T. Bellocq, J. 1998b, Concentrations of PAHs (polycyclic aromatic hydrocarbons) in various marine organisms in relation to those in sediments and to trophic level. Mar. Pollut. Bull. 36 951-960. 

Polycyclic aromatic hydrocarbons (PAHs) polycyclic aromatic hydrocarbons are a suite of compounds comprised of two or more condensed aromatic rings. They are found in many petroleum mixtures, and they are introduced to the enviromnent predominantly through natural and anthropogenic combustion processes. 

A second reason why marine pollution is difficult to measme lies in the large number of pollutants being introduced and the myriad of pathways by which they enter the oceans. In 2006, 82,000 different chemicals were in commercial use, with approximately 1000 new ones being added annually. Most have the potential to reach the ocean. In some cases, groups of these compoimds can be measured in one analysis, such as the PCBs (polychlorinated biphenyls) and PAHs (polycyclic aromatic hydrocarbons). Nevertheless, a large number of analyses are required to measme all the pollutants that can potentially be present in seawater. 

ESTD, ex situ thermal desorption VOCs, volatile organic compounds TPH, total petroleum hydrocarbons BTEX, benzene, toluene, ethylbenzene, xylene PCBs, polychlorinated biphenyls PAHs, polycyclic aromatic hydrocarbons ISTD, in situ thermal desorption. 

List of abbreviations BOD, biological oxygen demand CA, chloroanisol CCA, copper-chromate-arsenate CP, chlorophenol 2,4-D, dichlorophenoxyacetic acid DCP, dichlorophenol CFSTR, continuous-flow stirred tank reactor FBBR, fluidized-bed biofilm reactor MCP, monochlorophenol NAPL, non-aqueous phase liquid PAH, polycyclic aromatic hydrocarbon PCPP, polychlorinated phenoxyphenol PCDF, polychlorinated dibenzofuran PCDD, polychlorinated dibenzodioxin PCR, polymerase chain reaction PCP, pentachlorophenol PCA, pentachloroanisole TeCP, tetrachlorophenol TeCA, tetrachloroanisole TCC, trichlorocatechol TCP, trichlorophenol TOC, total organic carbon 2,4,5-T, trichlorophenoxyacetic acid UASB, upflow anaerobic sludge blanket reactor VSS, volatile suspended solids. 

Polyhexes are used widely (see, for example, [Dia88, Bal95]) in organic chemistry they represent completely condensed PAH (polycyclic aromatic hydrocarbons) C Hm with n vertices (atoms of the carbon C), including m vertices of degree two, where atoms of the hydrogen H are adjoined (see Figure 7.1). 

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