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Distribution of particle-phase hydrocarbons, PAHs and OCPs in Tianjin, China
AbstractAliphatic hydrocarbons, polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) were determined in the total suspended particles (TSP) collected from 13 different locations in Tianjin, China, where intensive coal burning for domestic heating in winter takes place and a large quantity of pesticides had been produced and applied. Carbon preference index (CPI), carbon number maximum (Cmax) of n-alkane and plant wax index (%wax Cn) indicate that n-alkanes come from both biogenic and petrogenic sources, and biogenic source contributes more n-alkanes in autumn than in winter. Petroleum biomarkers as indicators of petrogenic source such as hopanes and steranes were also detected in both seasons’ samples. The sum of 16 PAH concentrations ranged from 69.3 to 2170ngm−3 in winter and from 7.01 to 40.0ngm−3 in autumn. Seasonal variations were mainly attributed to the difference in coal combustion emission and meteorological conditions. The results of a source diagnostic analysis suggest that PAHs in TSP mainly come from coal combustion. Seven OCPs (four hexachlorohexanes (HCHs) and three dichlorodipheny-trichloroethane and metabolites (DDTs)) were detected in most samples. Concentrations of the sum of α-, β-, δ- and γ-HCH and the sum of p,p′-DDT, p,p′-DDD and p,p′-DDE in autumn varied in the ranges of 0.002–0.9ngm−3 and 0.025–2.21ngm−3 with the average±standard deviation values of 0.127±0.241ngm−3 and 0.239±0.546ngm−3, respectively. In winter, and in TSP ranged from 0.071 to 5.35ngm−3 and from 0.416 to 3.14ngm−3 with the average±standard deviation values 1.05±1.88ngm−3 and 0.839±0.713ngm−3, respectively. Both of the illegal application of technical HCH and DDT and the volatilization from topsoil contributed to the particle-phase contents of HCHs and DDTs in the atmosphere.
Distribution of particle-phase hydrocarbons, PAHs and OCPs in Tianjin, China
AbstractAliphatic hydrocarbons, polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) were determined in the total suspended particles (TSP) collected from 13 different locations in Tianjin, China, where intensive coal burning for domestic heating in winter takes place and a large quantity of pesticides had been produced and applied. Carbon preference index (CPI), carbon number maximum (Cmax) of n-alkane and plant wax index (%wax Cn) indicate that n-alkanes come from both biogenic and petrogenic sources, and biogenic source contributes more n-alkanes in autumn than in winter. Petroleum biomarkers as indicators of petrogenic source such as hopanes and steranes were also detected in both seasons’ samples. The sum of 16 PAH concentrations ranged from 69.3 to 2170ngm−3 in winter and from 7.01 to 40.0ngm−3 in autumn. Seasonal variations were mainly attributed to the difference in coal combustion emission and meteorological conditions. The results of a source diagnostic analysis suggest that PAHs in TSP mainly come from coal combustion. Seven OCPs (four hexachlorohexanes (HCHs) and three dichlorodipheny-trichloroethane and metabolites (DDTs)) were detected in most samples. Concentrations of the sum of α-, β-, δ- and γ-HCH and the sum of p,p′-DDT, p,p′-DDD and p,p′-DDE in autumn varied in the ranges of 0.002–0.9ngm−3 and 0.025–2.21ngm−3 with the average±standard deviation values of 0.127±0.241ngm−3 and 0.239±0.546ngm−3, respectively. In winter, and in TSP ranged from 0.071 to 5.35ngm−3 and from 0.416 to 3.14ngm−3 with the average±standard deviation values 1.05±1.88ngm−3 and 0.839±0.713ngm−3, respectively. Both of the illegal application of technical HCH and DDT and the volatilization from topsoil contributed to the particle-phase contents of HCHs and DDTs in the atmosphere.
Distribution of particle-phase hydrocarbons, PAHs and OCPs in Tianjin, China
Wu, Shui-Ping (author) / Tao, Shu (author) / Zhang, Zhi-Huan (author) / Lan, Tian (author) / Zuo, Qian (author)
Atmospheric Environment ; 39 ; 7420-7432
2005-08-25
13 pages
Article (Journal)
Electronic Resource
English
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