Emission characteristics and individual particle analysis of metals in fine particles emitted from residential coal burning
ZHANG Yin-xiao1,2, LU Chun-ying1, ZHANG Jian1, WANG Xin-feng1, LI Wei-jun2
1. Environment Research Institute, Shandong University, Ji'nan 250100, China;
2. Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
Five typical coals with different maturities were selected and burned in the residential stove, and then the individual particles and PM2.5 samples from these coals burning were collected. A transmission electron microscopy with energy-dispersive X-ray spectrometry (TEM-EDS) was used to analyze physicochemical characteristics of metal-containing individual particles. The concentrations of 14metals (including eight heavy metals) in PM2.5 were detected by inductively coupled plasma mass spectrometry and inductively coupled plasma optical emission spectrometer. The individual particle analysis showed seven different types of metal-containing particles:mineral, K-rich, S[K]-rich, Fe-rich, Zn-rich, and Pb-rich particles, and some carbonaceous particles. Mass concentrations of 14metals and eight heavy metals accounted for 1.29%~15.54% and 0.09%~2.53% in PM2.5, respectively. Al, Ca and Na were the dominant metals, accounting for 57%~80% of total metals. Zn and Pb were the dominant heavy metals, accounting for 54%~91% of total heavy metals. TEM observations showed that Zn and Pb mainly occurred in Zn-rich and Pb-rich particles with size<1μm, respectively. These heavy metals can be breathed into deep of human lung and pose adverse effects on human health. Therefore, in order to protect human health, we suggest that residents should use clean coal or clean energy to reduce the heavy metals emissions.
张银晓, 卢春颖, 张剑, 王新锋, 李卫军. 民用燃煤排放细颗粒中金属元素排放特征及单颗粒分析[J]. 中国环境科学, 2018, 38(9): 3273-3279.
ZHANG Yin-xiao, LU Chun-ying, ZHANG Jian, WANG Xin-feng, LI Wei-jun. Emission characteristics and individual particle analysis of metals in fine particles emitted from residential coal burning. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(9): 3273-3279.
Zhang Y, Schauer J J, Zhang Y, et al. Characteristics of Particulate Carbon Emissions from Real-World Chinese Coal Combustion[J]. Environmental Science & Technology, 2008,42(14):5068-5073.
[5]
Li Q, Jiang J, Wang S, et al. Impacts of household coal and biomass combustion on indoor and ambient air quality in China:Current status and implication[J]. Science of the Total Environment, 2017,576:347-361.
Lan Q, Chapman R S, Schreinemachers D M, et al. Household stove improvement and risk of lung cancer in Xuanwei, China[J]. Journal of the National Cancer Institute, 2002,94(11):826.
Chen Y J, Zhi G R, Feng Y L, et al. Measurements of Black and Organic Carbon Emission Factors for Household Coal Combustion in China:Implication for Emission Reduction[J]. Environmental Science & Technology, 2009,43(24):9495-9500.
[17]
Zhi G R, Chen Y J, Feng Y L, et al. Emission characteristics of carbonaceous particles from various residential coal-stoves in China[J]. Environmental Science & Technology, 2008,42(9):3310-3315.
Ge S, Xu X, Chow J C, et al. Emissions of air pollutants from household stoves:Honeycomb coal versus coal cake[J]. Environmental Science & Technology, 2004,38(17):4612-4618.
[23]
李卫军.雾霾和沙尘污染天气气溶胶单颗粒研究[M]. 北京:科学出版社, 2013:8-9.
[24]
Bond T C, Covert D S, Kramlich J C, et al. Primary particle emissions from residential coal burning:Optical properties and size distributions[J]. Journal of Geophysical Research-Atmospheres, 2002,107(D21), 8347.
[25]
Li W, Shao L, Zhang D, et al. A review of single aerosol particle studies in the atmosphere of East Asia:morphology, mixing state, source, and heterogeneous reactions[J]. Journal of Cleaner Production, 2016,112:1330-1349.
[26]
Li W J, Shao L Y, Buseck P R.Haze types in Beijing and the influence of agricultural biomass burning[J]. Atmospheric Chemistry & Physics, 2010,10(17):8119-8130.
[27]
Li W, Shao L. Transmission electron microscopy study of aerosol particles from the brown hazes in northern China[J]. Journal of Geophysical Research:Atmospheres, 2009,114,D09302.
[28]
Huang W, Huang B, Bi X, et al. Emission of PAHs, NPAHs and OPAHs from residential honeycomb coal briquette combustion[J]. Energy & Fuels, 2014,28(1):636-642.