Collecting Particulate Matter and Particle-Bound Polycyclic Aromatic   Hydrocarbons Using a Cylindrical Thermal Precipitator

doi:10.1061/(ASCE)EE.1943-7870.0001215

CORC > 北京大学 > 城市与环境学院

	Collecting Particulate Matter and Particle-Bound Polycyclic Aromatic Hydrocarbons Using a Cylindrical Thermal Precipitator
	Su, Shu ; Wang, Bin ; Lin, Nan ; Zhuo, Shaojie ; Liu, Junfeng ; Wang, Xilong ; Cheng, Hefa ; Chen, Da-Ren ; Zeng, Eddy Y. ; Tao, Shu
刊名	JOURNAL OF ENVIRONMENTAL ENGINEERING
	2017
关键词	Thermophoresis Thermal precipitator Particulate matter Polycyclic aromatic hydrocarbon Sampling Collection efficiency AIR-POLLUTION THERMOPHORETIC PRECIPITATOR NANOPARTICLE SAMPLER SIZE FRACTIONS IN-VITRO CELLS DEPOSITION DESIGN FINE ULTRAFINE
DOI	10.1061/(ASCE)EE.1943-7870.0001215
英文摘要	Thermophoresis has been used to develop various thermal precipitators; however, their collection performance for ambient particulate matter (PM) with an aerodynamic diameter less than 10 mu m (PM10) has been rarely reported, and the effect of the temperature gradient adopted in the precipitator on the evaporation loss of the organic fraction of collected particles has not been discussed to the authors' knowledge. In this study, a cylindrical thermal precipitator consisting of two coaxially aligned cylinders with an annular space of 0.51 mm and a two-inlet impactor was designed for collecting PM10. The effects of the sampling flow rate and temperature gradient on the collection efficiency were examined. The precipitator was also tested for its collection efficiency for particle-bound polycyclic aromatic hydrocarbons (PAHs). At a temperature gradient of 72.6 degrees C/mm and a flow rate of 7.74 L/min, the collection efficiency could reach 100% for PM with an electrical mobility diameter (D-p) < 0.5 mu m and decreased gradually to 70% as D-p increased from 0.5 to 1.0 mu m. For PM with D-p > 1.0 mu m, the collection efficiency increased due to impaction at the inlet. The collection efficiency increased with an increase in the temperature gradient or a decrease in the inlet flow rate. The semiempirical model could reasonably fit the collection efficiency curve of the precipitator. No significant evaporation loss of PAHs was found when the temperature of the cold cylinder surface was approximately 0 degrees C. It was concluded that the thermal precipitator could be used to collect ambient fine PM with a size less than 0.5 mu m, and the inlet impactor design could improve the collection efficiency for coarse particles. (C) 2017 American Society of Civil Engineers.; National Natural Science Foundation of China [41390240, 41571130010, 41130754]; SCI(E); ARTICLE; 6; 143
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473258]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Su, Shu,Wang, Bin,Lin, Nan,et al. Collecting Particulate Matter and Particle-Bound Polycyclic Aromatic Hydrocarbons Using a Cylindrical Thermal Precipitator[J]. JOURNAL OF ENVIRONMENTAL ENGINEERING,2017.
APA	Su, Shu.,Wang, Bin.,Lin, Nan.,Zhuo, Shaojie.,Liu, Junfeng.,...&Tao, Shu.(2017).Collecting Particulate Matter and Particle-Bound Polycyclic Aromatic Hydrocarbons Using a Cylindrical Thermal Precipitator.JOURNAL OF ENVIRONMENTAL ENGINEERING.
MLA	Su, Shu,et al."Collecting Particulate Matter and Particle-Bound Polycyclic Aromatic Hydrocarbons Using a Cylindrical Thermal Precipitator".JOURNAL OF ENVIRONMENTAL ENGINEERING (2017).