title: [Influence of inorganic additives on the distribution of polycyclic aromatic hydrocarbons in the smoke and ash from mosquito coils burning].
abstract: The influence of inorganic additives (NaCl, Na2CO3 and CaCO3) on the distribution of polycyclic aromatic hydrocarbons (PAHs) in the smoke and ash from mosquito coils burning was studied, GC-MS technique was applied to analyze the contents of 16 priority-controlled PAHs recommended by US EPA. The results show that 16 priority-controlled PAHs are detected in the smoke of mosquito coil without additives, characterized by the predominance of 2- to 3-ring PAHs, which are ranked as NaP (3.109 microg x g(-1)) > Phe (1.230 microg x g(-1)) > AcP (0.495 microg x g(-1)) > FluA (0.311 microg x g(-1)); the emission factors in the ash are also predominated by 2- to 3-ring PAHs, but the total PAHs emission factors in the ash are only 4.7% of those in the smoke. NaCl and Na2CO3 additives can not decrease the emission of PAHs but promote total emission factors and TEQ of PAHs in the smoke of mosquito coils increase remarkably. The best additive in this study is CaCO3. With the increase of the addition of CaCO3, the proportion for 2- to 3-ring PAHs in the smoke increases remarkably than that in the ash, while the status reverse for 5- to 6-ring PAHs. CaCO3 with mole fraction of 2.0% has the most excellent property to decrease total emission factors and TEQ of PAHs in the smoke of mosquito coils, and the total emission factors and TEQ of PAHs decrease 1.8% and 86.6% respectively compared with the control.
authors.affiliation: School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China. zhouhongcang@163.com
authors.forename: Hong-Cang
authors.initials: HC
authors.lastname: Zhou
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Song
authors.forename: Jian-Gang
authors.initials: JG
authors.lastname: Lu
authors.forename: Hong-Shuang
authors.initials: HS
authors.lastname: Li
authors.forename: Hua-Xia
authors.initials: HX
authors.lastname: Cai
mesh_terms: D016902:Air Pollution, Indoor / Q000517:prevention & control*; D000818:Animals; D002254:Carbonates / Q000737:chemistry; D007287:Inorganic Chemicals / Q000737:chemistry*; D009032:Mosquito Control / Q000379:methods*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012906:Smoke / Q000032:analysis*; D012965:Sodium Chloride / Q000737:chemistry
chemical_list: D002254:Carbonates; D007287:Inorganic Chemicals; D011084:Polycyclic Aromatic Hydrocarbons; D012906:Smoke; D012965:Sodium Chloride; C005686:sodium carbonate