Carbonaceous Aerosol Emissions from Household Biofuel Combustion in China
Carbonaceous Aerosol Emissions from Household Biofuel Combustion in China
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DOI：
10.1021/es803330j
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发表时间：
2009-08-01
影响因子：
11.4
通讯作者：
Nie, Yongfeng
中科院分区：
文献类型：
--
作者：
Li, Xinghua;Wang, Shuxiao;Nie, Yongfeng
在中国的四个有代表性的农村地区进行了实地测量，以确定家用生物燃料燃烧的碳质气溶胶排放。结果表明，黑碳(BC)和有机碳(OC)的粒度分布均在0.26-0.38微米之间达到峰值。有机碳在所有粒度类别的麦渣燃烧细颗粒物中所占的比例都很大，而BC和OC在所有粒度类别的薪材燃烧的细颗粒物中都占了很大比例。作物废弃物的排放因子BC和OC分别为0.43+/-0.32和1.93+/-1.00g/kg。木质燃料的排放因子BC为1.49+/-0.69g/kg，OC为13+/-0.40g/kg。木质燃料BC/PM2.5的比值显著高于农作物废弃物的BC/PM2.5比值，介于36.40~71.18%之间，而作物废弃物的BC/PM2.5比值介于1.70~33.52%之间。伍迪燃料的碳碳比也很高，从0.95到2.51不等。2005年，木质燃料燃烧约占中国估计的430千兆克BC排放量的三分之二，农作物垃圾燃烧约占中国2005年家用生物燃料燃烧的922千兆克有机碳排放量的80%。
Field measurements were conducted in four representative rural areas across China to determine carbonaceous aerosol emissions from combustion of household biofuel. Results showed that the size distribution of both black carbon (BC) and organic carbon (OC) peaked at 0.26-0.38 mu m. OC accounted for a significant fraction of fine particles from wheat residue combustion across all size categories, whereas both BC and OC accounted for a significant fraction of fine particles from fuel wood combustion across all size categories. The emission factors for crop wastes are 0.43 +/- 0.32 and 1.93 +/- 1.00 g/kg for BC and OC, respectively. The emission factors for woody fuel were 1.49 +/- 0.69 g/kg and 13 +/- 0.40 g/kg for BC and OC, respectively. Woody fuel BC-to-PM2.5 ratios were significantly higher than the ratios from crop waste, ranging from 36.40 to 71.18%, relative to crop waste BC-to-PM2.5 ratios which ranged from 1.70 to 33.52%. Woody fuel also had high BC-to-OC ratios, ranging from 0.95 to 2.51. Woody fuel combustion accounts for approximately two-thirds of China's estimated 430 Gg of BC emissions and crop waste combustion accounts for approximately 80% of China's 922 Gg of OC emissions from household biofuel combustion in 2005.