1. College of Forestry, Fujian Agricultural and Forestry University, Fuzhou 350002, China; 2. Collaborative Innovation Center of Soil and Water Conservation in Red Soil Region of the Cross-Strait, Fuzhou 350002, China
Abstract：A self-designed biomass combustion device was used to analyze the water-soluble elements of PM2.5 released by the combustion of different organs (branches, leaves and bark) of five typical tree species in the Greater Xing'an Mountains under different combustion conditions (flaming and smoldering). The results showed that the emission factors (EF) of PM2.5 significantly varied among different tree species, and the emission rate ranged from (2.408±0.854) to (9.227±1.172)g/kg. Mg, Ca, K and 11 other ionic species were detected in the PM2.5 released by five tree species, of which the EFs of Ca, K, Zn and Mg were significantly higher than other ionic species. The EFs from conifers were higher than hardwood species. Except for Cd, no significant difference was identified in the total emission of ionic species among various organs of five tree species. The proportions of ionic species in PM2.5 released from different organs was generally consistent among five tree species, of which Ca、K、Zn and Mg were four dominant ionic species in branch, leaf and bark. In addition, emissions of ionic species were significantly influenced by the combustion condition, and the EFs of Li, Mg, Ca and four other ionic species were significantly higher under flaming than smoldering.
郭新彬, 郑文霞, 魏帽, 郭林飞, 马远帆, 郭福涛. 大兴安岭5种乔木树种燃烧释放PM2.5中水溶性元素特性[J]. 中国环境科学, 2020, 40(8): 3275-3283.
GUO Xin-bin, ZHENG Wen-xia, WEI Mao, GUO Lin-fei, MA Yuan-fan, GUO Fu-tao. Characteristics of water-soluble elements in PM2.5 released from the combustion of five tree species in the Greater Xing'an Mountains. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(8): 3275-3283.
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