Atmospheric Chlorinated And Their Parent Polycyclic Aromatic Hydrocarbons, And PM_2.5&PM₁₀ Associated Phthalate In A Suburban Area Of Shanghai, China

Based on the domestic and international studies, this paper focuses on the levelof concentration, characteristics of pollution, analysis of source and risk assessmentof health about CIPAHs and their parent PAHs from the passive atmospheric samples,which of those collected Shanghai Baoshan. Simultaneously, analyze ClPAHs andparent PAHs from passive atmospheric samples and further explores the sources ofthem. And we studied in the pollution characters PAEs in PM2.5&PM10of activesamples. The conclusions were as below：1. Within the research area,∑PAHs of passive atmospheric samples is164.99ng/m3. After component analysis and characteristics ratio analysis, the main sourcesof atmospheric PAH in the research area are incomplete combustion of coal andfossil fuels in traffic.∑TEQs of16PAHs in PUF is11.90ng/m3-BaPeq, and∑7carTEQs of7carcinogenic PAHs is10.70ng/m3-BaPeq. Through the furtherassessing on the carcinogenic risk to different age groups, potential lifetimecarcinogenic risk is higher by dermal than which is by inhalation. Moreover, thepriority of that risk to different age from higher to lower is adult, child andadolescent. The values of all age groups are higher than the acceptable level ofUSEPA, so there is potential health risk to humans.2. In the11compounds of20CIPAHs, the highest value of averageconcentration is176.25pg/m3（7,12-Cl2BaA）, the lowest one is23.76pg/m3（5,7-Cl2Flu）, and the total average concentration is745.76pg/m3. All of these values,which locate the upper level, are higher than the concentrations of other atmosphericparticulate matters in our previous study. TEQClPAHsis81.56pg/m3-TEQ，compared to the toxicity of CIPAHs in particles phase in this area, the toxicity ofClPAHs in gaseous state is much higher. Through the special ratios analysis，itshows that the main source of ClPAHs is incomplete combustion emissions ofincinerators, traffic and the Chlorine material. 3. Compared with the concentration distinctions and the correlation of parentPAHs and ClPAHs, it shows that the dominant constituents of them are the same.They are Fle/ClFle and Phe/ClPhe. So we speculate that the ClPAHs has closerelationship with parent PAHs.4. In the reserch area, the average concentrations of total6PAEs in PM2.5andPM10are59.8ng/m3and132ng/m3, respectively. It shows that, PAEs is generallyexisted in atmospheric particulate phase. DEHP, DBP and DIBP is the maincomponent, and DEHP is the dominant part in PM2.5&PM10. In warm seasons, theconcentrationa of total PAEs in PM2.5and PM10are71.9ng/m3and207ng/m3,respectively, and the values are higher than those in cold seasons (50.4ng/m3inPM2.5and76.9ng/m3in PM10). We estimation of vapor phase phthalateconcentrations from PM through theoretical derivation of the distribution ofcompounds between the vapor phase and particulate phase. And then the averageconcentration in gas-phase is260ng/m3, and the dominant constituent is DEHP, theaverage concentration is of DEHP is172ng/m3. So we use the sum concentration ofgas-phase and particle phase of DEHP to calculate the incremental lifetime cancerrisk (ILCR). the priority of that risk to different age from higher to lower is adult,child and adolescent. The values of all age group are higher than the acceptable levelof USEPA, and have a health risk to humans. So the PAEs in gas-phase arenon-ignorable.