College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
J Hazard Mater. 2012 Jan 15;199-200:272-81. doi: 10.1016/j.jhazmat.2011.11.004. Epub 2011 Nov 9.
In this study, the characterizations of soot from ceramic furnace flue gas were studied using environmental scanning electron microscopy, energy dispersive spectroscopy, particle size distribution, specific surface area measurements, crystal characterizations and organic pollutant analysis. Soot particles were mainly spherical nanoparticles with diameters less than 100 nm. However, the particles could be aggregated into larger ones with a median diameter of 3.66 μm. Nanometer pores with diameters ranging 2-4 nm were also detected in the soot particles. Because of their large surface areas and pore volumes, other pollutants in the environment can be adsorbed to soot particles potentially making them more hazardous. Several elements, including C, O and Pb, were detected in the soot, but only small amounts of crystalline materials were observed. This is because most of the detected carbon and metals/metal oxides/metal salts were amorphous. Approximately 90 different organic pollutants were detected in the soot, including aromatic compounds and other hydrocarbons. Because of the carcinogenic properties of aromatic compounds and the photochemical effects of hydrocarbons, soot could have serious health and environmental impacts. The results suggest that soot particles are hazardous material and urgently need to be controlled.
本研究采用环境扫描电子显微镜、能量色散谱、粒径分布、比表面积测量、晶体特性和有机污染物分析，对陶瓷炉烟道中的烟尘特性进行了研究。烟尘颗粒主要为直径小于 100nm 的球形纳米颗粒，但颗粒可能会聚集形成直径为 3.66μm 的较大颗粒。在烟尘颗粒中还检测到了直径在 2-4nm 的纳米级孔隙。由于其具有较大的表面积和孔体积，环境中的其他污染物可能会被吸附到烟尘颗粒上，从而使它们更具危害性。烟尘中检测到包括 C、O 和 Pb 在内的几种元素，但只观察到少量结晶物质。这是因为大部分检测到的碳和金属/金属氧化物/金属盐都是无定形的。在烟尘中检测到了大约 90 种不同的有机污染物，包括芳香族化合物和其他碳氢化合物。由于芳香族化合物具有致癌性，碳氢化合物具有光化学效应，因此烟尘可能会对健康和环境造成严重影响。研究结果表明，烟尘颗粒是危险物质，急需加以控制。
