Emission factors of typical air pollutants from open burning of crop straws
WANG Yan1,2, HAO Wei-wei1, CHENG Ke1, ZHI Guo-rui3, YI Peng3, FAN Jing1
1. Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang 453007, China; 2. School of Public Health, Xinxiang Medical University, Xinxiang 453003, China; 3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Abstract：Air pollutants emission from open burning of typical crop straws (including corn, wheat, peanut, and cotton) were characterized by using the flue gas pollutants dilution sampling system. The parameter of modified combustion efficiency (MCE) was applied to distinguish different combustion states. The carbon-balance methodology was adopted to calculate emission factors of particulate and gaseous air pollutants of flue gas from open burning. The results showed that the average emission factors of CO, SO2, NOx and CH4 from the open burning of four crop straws were 7.39~92.4g/kg, 0.11~0.89g/kg, 0.72~3.86g/kg and 0.2~5.45g/kg, respectively. The average emission factor of PM2.5 was 1.48~13.29g/kg. As the main component of PM2.5, the mass ratio of organic carbon (OC) and elemental carbon (EC) accounted for 27.7%~54.3% and 4.4%~17.1% of the total mass of PM2.5, respectively. Air pollutants mainly came from the mixed combustion state. The concentration of pollutants during the smoldering combustion state was relatively higher. With the increasing of moisture content, the duration of smoldering combustion state was prolonged significantly, which caused the emission factors of CO, CH4, PM2.5 and OC increased. The higher proportion of OC component was the main reason of increased PM2.5 emission.
王艳, 郝炜伟, 程轲, 支国瑞, 易鹏, 樊静. 秸秆露天焚烧典型大气污染物排放因子[J]. 中国环境科学, 2018, 38(6): 2055-2061.
WANG Yan, HAO Wei-wei, CHENG Ke, ZHI Guo-rui, YI Peng, FAN Jing. Emission factors of typical air pollutants from open burning of crop straws. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2055-2061.
Miura Y, Kanno T. Emissions of trace gases (CO2, CO, CH4, and N2O) resulting from rice straw burning[J]. Soil Science & Plant Nutrition, 1997,43(4):849-854.
[2]
Penner J E, Dickinson R E, O'Neill C A. Effects of aerosol from biomass burning on the global radiation budget[J]. Science, 1992,256(5062):1432-1434.
[3]
Levine J. Biomass burning:Its history, use, and distribution and its impact on environmental quality and global climate[C]//MIT Press, 1991:3-21.
[4]
Oliveira B F, Ignotti E, Hacon S S. A systematic review of the physical and chemical characteristics of pollutants from biomass burning and combustion of fossil fuels and health effects in Brazil[J]. Cadernos De Saúde Pública, 2011,27(9):1678-1698.
[5]
Crutzen P J, Andreae M O. Biomass burning in the tropics:impact on atmospheric chemistry and biogeochemical cycles[J]. Science, 1990,250(4988):1669-1678.
[6]
Yan X, Ohara T, Akimoto H. Bottom-up estimate of biomass burning in mainland China[J]. Atmospheric Environment, 2006,40(27):5262-5273.
[7]
Abel S J, Highwood E J, Haywood J M, et al. The direct radiative effect of biomass burning aerosols over southern Africa[J]. Atmospheric Chemistry & Physics, 2005,5(7):1999-2018.
Wang L, Xin J, Li X, et al. The variability of biomass burning and its influence on regional aerosol properties during the wheat harvest season in North China[J]. Atmospheric Research, 2015, 157:153-163.
[13]
Hays M D, Fine P M, Geron C D, et al. Open burning of agricultural biomass:Physical and chemical properties of particle-phase emissions[J]. Atmospheric Environment, 2005, 39(36):6747-6764.
[14]
Cao G, Zhang X, Gong S, et al. Investigation on emission factors of particulate matter and gaseous pollutants from crop residue burning[J]. Journal of Environmental Sciences, 2008,20(1):50-55.
[15]
Hayashi K, Ono K, Kajiura M, et al. Trace gas and particle emissions from open burning of three cereal crop residues:Increase in residue moistness enhances emissions of carbon monoxide, methane, and particulate organic carbon[J]. Atmospheric Environment, 2014,95(1):36-44.
Reid J S, Koppmann R, Eck T F, et al. A review of biomass burning emissions part Ⅱ:intensive physical properties of biomass burning particles[J]. Atmospheric Chemistry & Physics, 2005,5(3):799-825.
[20]
Zhang J, Smith K R, Ma Y, et al. Greenhouse gases and other airborne pollutants from household stoves in China:a database for emission factors[J]. Atmospheric Environment, 2000,34(26):4537-4549.
[21]
Dan M, Zhuang G, Li X, et al. The characteristics of carbonaceous species and their sources in PM2.5 in Beijing[J]. Atmospheric Environment, 2004,38(21):3443-3452.
[22]
Ni H, Han Y, Cao J, et al. Emission characteristics of carbonaceous particles and trace gases from open burning of crop residues in China[J]. Atmospheric Environment, 2015,123:399-406.
[23]
Shen G, Yang Y, Wang W, et al. Emission factors of particulate matter and elemental carbon for crop residues and coals burned in typical household stoves in China[J]. Environmental Science & Technology, 2010,44(18):7157-7162.
