Analysis and structure prediction of chlorinated polycyclic aromatic hydrocarbons released from combustion of polyvinylchloride

Abstract

Chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) released from combustion of polyvinylchloride (PVC) at different furnace temperatures were investigated. A laboratory-scale tube-type furnace with electric heating was utilized to control combustion conditions. Glass fabric filters and adsorbents were used to collect the combustion emissions. Following Soxhlet extraction, concentration and column chromatography purification, isomers separation, selective detection and identification of Cl-PAHs were performed on GC/MS system on the basis of retention data and mass spectra. Their quantification was accomplished by using external standard calibration technique. About 18 Cl-PAHs were determined, most of which were monochlorinated derivatives of naphthalene, biphenyl, fluorene, phenanthrene, anthracene, fluoranthene and pyrene. Only two dichlorophenanthrenes or anthracenes were identified. The possible positions of chlorine atoms attached to the aromatic rings are predicted by quantitative structure-property relationship. The levels of these compounds were in the range of 0.30-29.08 lg/g PVC. The relationship between the formation of Cl-PAHs and PAHs was discussed.

Semivolatile and volatile compounds from the pyrolysis and combustion of polyvinyl chloride

“…Apart from hydrogen chloride, chlorinated aromatic compounds are evolved during pyrolysis or combustion of PVC, such as light chlorinated aliphatic hydrocarbons [5], chlorinated PAHs [15], chlorobenzenes (ClBzs) [6,16,13], chlorophenols (ClPhs) [13], chlorobiphenyls (PCBs) [13,17], polychlorodibenzo-p-dioxins (PCDDs) and polychlorodibenzofurans (PCDFs) [11,13,[17][18][19][20][21][22].…”

Dechlorane Plus and decabromodiphenyl ether in atmospheric particles of northeast Asian cities

“…This figure indicates that the chlorination of PAHs proceeds to a greater extent in Japan and Korea, compared to China, especially in winter. It is reported that the ClPAH/PAH ratio in ash varied according to the type of waste incinerator (Horii et al, 2008), and that the formation of chlorinated hydrocarbons and PAHs was affected by parameters including furnace temperature and the types of material combusted (Wang et al, 2003;Takasuga et al, 2007). Consequently, we consider that the lower ClPAH/PAH ratio in China is influenced by the contributions from specific PAH emission sources, which generate relatively low ClPAHs.…”

“…Alternatively, sources that generate PAHs may generate irregular quantities of ClPAHs. At present, there is still a limited amount of information about the mechanisms of formation (Shiraishi et al, 1985;Wang et al, 2003;Takasuga et al, 2007;Sankoda et al, 2012), environmental pollution levels , biological matrix levels, and human exposure levels to ClPAHs. Since it is difficult to analyze the total intake of contaminants from every source, the measurement of PAH metabolites, which are excreted in the urine, is a well-established method for the estimation of the levels of human PAH exposure (Buchet et al, 1992;Chetiyanukornkul et al, 2002;.…”

Analysis of Halogenated Polycyclic Aromatic Hydrocarbons in the Air

“…Wang et al investigated the mechanism of formation of ClPAHs in the polyvinylchloride combustion process by a laboratory-scale tube-type furnace with electric heating [29]. At the temperature range of 600-900 °C, about 18 Cl-PAHs were determined, most of which were monochlorinated derivatives of naphthalene, biphenyl, fluorene, phenanthrene, anthracene, fluoranthene and pyrene.…”