Differences between a deciduous and a conifer tree species in gaseous and particulate emissions from biomass burning

In the Mediterranean ecosystem, wildfires are very frequent and the predicted future with a probable increase of fires could drastically modify the vegetation scenarios. Vegetation fires are an important source of gases and primary emissions of fine carbonaceous particles in the atmosphere. In this paper, we present gaseous and particulate emissions data from the combustion of different plant tissues (needles/leaves, branches and needle/leaf litter), obtained from one conifer (Pinus halepensis) and one deciduous broadleaf tree (Quercus pubescens). Both species are commonly found throughout the Mediterranean area, often subject to wildfires. Experiments were carried out in a combustion chamber continuously sampling emissions throughout the different phases of a fire (pre-ignition, flaming and smoldering). We identified and quantified 83 volatile organic compounds including important carcinogens that can affect human health. CO and CO2 were the main gaseous species emitted, benzene and toluene were the dominant aromatic hydrocarbons, methyl-vinyl-ketone and methyl-ethyl-ketone were the most abundant measured oxygenated volatile organic compounds. CO2 and methane emissions peaked during the flaming phase, while the peak of CO emissions occurred during the smoldering phase. Overall, needle/leaf combustion released a greater amount of volatile organic compounds into the atmosphere than the combustion of branches and litter. There were few differences between emissions from the combustion of the two tree species, except for some compounds. The combustion of P. halepensis released a great amount of monoterpenes as α-pinene, β-pinene, p-cymene, sabinene, 3-carene, terpinolene and camphene that are not emitted from the combustion of Q. pubescens. The combustion of branches showed the longest duration of flaming and peak of temperature. Data presented appear crucial for modeling with the intent of understanding the loss of C during different phases of fire and how different typologies of biomass can affect wildfires and their speciation emissions profile. © 2017 Elsevier Ltd

Pallozzi E.1 , Lusini I.2 , Cherubini L.2 , Hajiaghayeva R.A. 3 , Ciccioli P.4 , Calfapietra C. 2, 5
Elsevier Ltd
  • 1 Institute of Agro-Environmental & Forest Biology (IBAF), National Research Council (CNR), Via Salaria km 29.300, Monterotondo Scalo, RM 00015, Italy
  • 2 Institute of Agro-Environmental & Forest Biology (IBAF), National Research Council (CNR), Viale Marconi 2, Porano, TR 05010, Italy
  • 3 Department of Landscape Design and Sustainable Ecosystems, Agrarian-technological Institute, RUDN University, Miklukho-Maklaya Str., 6, Moscow, 117198, Russian Federation
  • 4 Institute of Chemical Methodologies (IMC), National Research Council (CNR), Via Salaria km 29.300, Monterotondo Scalo, RM 00015, Italy
  • 5 Global Change Research Institute, Czech Academy of Sciences, Belidla 986/4a, Brno, CZ 603 00, Italy
Ключевые слова
Carbon dioxide; Combustion chambers; Essential oils; Fires; Forestry; Gas chromatography; Ignition; Ketones; Monoterpenes; Needles; Toluene; Vegetation; Volatile organic compounds; Benzene and Toluene; Carbonaceous particles; Mediterranean areas; Mediterranean ecosystem; Methane emissions; Methyl ethyl ketones; Methyl vinyl ketones; Primary emissions; Particulate emissions; 2 butanone; 3 carene; aromatic hydrocarbon; benzene; beta pinene; camphene; carbon dioxide; carcinogen; cobalt; ketone; methane; methyl vinyl ketone; para cymene; pinene; sabinene; terpene; terpinolene; toluene; unclassified drug; volatile organic compound; 3-carene; 4-cymene; alpha-pinene; terpene; volatile organic compound; aromatic hydrocarbon; biomass burning; carbon dioxide; carbon emission; carbon monoxide; coniferous tree; deciduous tree; particulate matter; volatile organic compound; air pollution control; Article; atmosphere; biomass; combustion; conifer; deciduous plant; ecosystem; environmental health; environmental temperature; fire; gas waste; nonhuman; oak; plant tissue; Quercus pubescens; sampling; air pollutant; analysis; biomass; chemistry; conifer; dust; gas; particulate matter; pine; tree; wildfire; Mediterranean Region; Coniferophyta; Pinus halepensis; Quercus pubescens; Air Pollutants; Biomass; Coniferophyta; Dust; Gases; Monoterpenes; Particulate Matter; Pinus; Quercus; Terpenes; Trees; Volatile Organic Compounds; Wildfires
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