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Kong S.,Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control | Kong S.,Nankai University | Shi J.,Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control | Shi J.,Nankai University | And 10 more authors.
Atmospheric Environment | Year: 2011

Polycyclic aromatic hydrocarbons within PM10 fraction of ashes from two coke production plants, one iron smelt plant, one heating station and one power plant were analyzed with GC-MS technique in 2009. The sum of 17 selected PAHs varied from 290.20 to 7055.72 μg/g and the amounts of carcinogenic PAHs were between 140.33 and 3345.46 μg/g. The most toxic ash was from the coke production plants and then from the iron smelt plant, coal-fired power plant and heating station according to BaP-based toxic equivalent factor (BaPeq) and BaP-based equivalent carcinogenic power (BaPE). PAHs profile of the iron smelt ash was significantly different from others with coefficient of divergence value higher than 0.40. Indicatory PAHs for coke production plants, heating station and coal-fired power plant were mainly 3-ring species such as Acy, Fl and Ace. While for iron smelt plant, they were Chr and BbF. Diagnostic ratios including Ant/(Ant + Phe), Flu/(Flu + Pyr), BaA/Chr, BbF/BkF, Ind/BghiP, IND/(IND + BghiP), BaP/BghiP, BaP/COR, Pyr/BaP, BaA/(BaA + Chr), BaA/BaP and BaP/(BaP + Chr) were calculated which were mostly different from other stacks for the iron smelt plant. © 2011 Elsevier Ltd.


Ji Y.,Nankai University | Ji Y.,Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control | Wang F.,Nankai University | Zhang L.,Nankai University | And 7 more authors.
Journal of Hazardous Materials | Year: 2014

A total of 448 samples including foodstuffs (rice, steamed bun, vegetables, meat, poultry, fish, milk and fruits), ambient PM10, drinking water, soil, indoor PM10 and indoor dust samples from Tianjin were obtained to determine the distribution of six priority phthalates (PAEs) and assess the human exposure to them. The results indicated that DBP and DEHP were the most frequently detected PAEs in these samples. The concentrations of PAEs in environmental media were higher than those in food. We estimated the daily intake (DI) of PAEs via ingestion, inhalation and dermal absorption from five sources (food, water, air, dust and soil). Dietary intake was the main exposure source to DEP, BBP, DEHP and DOP, whereas water ingestion/absorption was the major source of exposure to DBP, DEHP and DOP. Although food and water were the overwhelmingly predominant sources of PAEs intake by Tianjin population, contaminated air was another important source of DMP, DEP and DBP contributing to up to 45% of the exposure. The results of this study will help in understanding the major pathways of human exposure to PAEs. These findings also suggest that human exposure to phthalate esters via the environment should not be overlooked. © 2014 Elsevier B.V.


Kong S.,Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control | Kong S.,Nankai University | Lu B.,Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control | Lu B.,Nankai University | And 12 more authors.
Microchemical Journal | Year: 2011

The concentrations of V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Hg and Pb in PM10 fraction of four types of dust in a coal-based city, Fushun were detected by inductively coupled plasma-atomic emission spectroscopy. Results showed that most of the average concentrations for 11 metals in dust were higher than Chinese soil background values, especially for Cu, Zn, Hg, Cd and Pb with higher pollution index values. The re-suspended dust from residential and school building surfaces showed middle and high level of pollution by geoaccumulation index assessment which should raise attention as their potential health risk to local residenter and students. Six hotspots were found from spatial distribution analysis, locating at the northeast corner, central area close to mines, southwest area adjacent to an expressway, northeast area close to power plants, the city center and the industrial district reflecting the influence of agricultural activities, mining activities, vehicle emission, coal combustion and industrial activities. Correlation and principal component analysis showed accordant results indicating that vehicle emission, industrial activities, coal combustion and crustal materials were the main sources for heavy metals in PM10 fraction of fugitive dust in Fushun. © 2011.


Wang J.,Nankai University | Wang J.,Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control | Duan C.,Nankai University | Duan C.,Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control | And 3 more authors.
Journal of Environmental Sciences | Year: 2010

Many studies on methane emissions from animal manure have revealed that animal manure is a major source of methane emissions to the atmosphere that can have negative consequences for people, animals and environment. In general, the release of methane can be influenced by the type of feed taken by animals, temperature, manure characteristics and so on. This study aimed at quantifying and comparing methane release from dairy manure with different piling treatments. Four treatments were designed including manure piling height 30, 45, 60 cm and adding 6 cm manure every day until the piling height was 60 cm. Static chamber method and gas chromatography were adopted to measure the methane emissions from April to June in 2009. Methane emission rates of all four manure treatments were low in the first week and then increased sharply until reaching the peak values. Subsequently, all the methane emission rates decreased and fluctuated within the steady range till the end of the experiment. Wilcoxon nonparametric tests analysis indicated that methane emission rate was greatly influenced by manure piling height and manner. There were no significant relationships between methane emission rates and the temperatures of ambience and heap. However, regression analysis showed that the quadratic equations were found between emission rates of all treatments and the gas temperature in the barrels. © 2010 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.

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