Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Soil and biomass mercury emissions during a prescribed fire in the Amazonian rain forest
https://orcid.org/0000-0001-8930-7970
Abstract Mercury stored in forests can be volatilized to the atmosphere during fires. Many factors influence this process such as mercury concentration, vegetation loading and the soil temperature reached during the fire. We quantified mercury emissions from biomass and soil during a prescribed fire in Brazil using the difference in mercury burden in vegetation and soil before and after burning, and data were critically compared with those previously obtained in a similar experiment in another part of the Amazonia. The calculated mercury emission factor was 4.1 ± 1.4 g Hg ha−1, with the main part (78%) originating from litterfall and O-horizon, and only 14% associated with live biomass. When considering the fuel burned loading, the emission factor ranged from 40 to 53 μg Hg kg−1. Data were also obtained on soil temperature profile and on Hg speciation in soil in an effort to relate these parameters to Hg emissions.
Graphical abstract Display Omitted
Highlights 4.1 ± 1.4 g mercury ha−1 were released from a prescribed fire in the Amazon basin. Litterfall and the soil O-horizon accounted for 78% of released Hg. Wood accounted for the smallest contribution emitted mercury. Gaseous mercury continued to be released from soil following the burn event.
Soil and biomass mercury emissions during a prescribed fire in the Amazonian rain forest
https://orcid.org/0000-0001-8930-7970
Abstract Mercury stored in forests can be volatilized to the atmosphere during fires. Many factors influence this process such as mercury concentration, vegetation loading and the soil temperature reached during the fire. We quantified mercury emissions from biomass and soil during a prescribed fire in Brazil using the difference in mercury burden in vegetation and soil before and after burning, and data were critically compared with those previously obtained in a similar experiment in another part of the Amazonia. The calculated mercury emission factor was 4.1 ± 1.4 g Hg ha−1, with the main part (78%) originating from litterfall and O-horizon, and only 14% associated with live biomass. When considering the fuel burned loading, the emission factor ranged from 40 to 53 μg Hg kg−1. Data were also obtained on soil temperature profile and on Hg speciation in soil in an effort to relate these parameters to Hg emissions.
Graphical abstract Display Omitted
Highlights 4.1 ± 1.4 g mercury ha−1 were released from a prescribed fire in the Amazon basin. Litterfall and the soil O-horizon accounted for 78% of released Hg. Wood accounted for the smallest contribution emitted mercury. Gaseous mercury continued to be released from soil following the burn event.
Soil and biomass mercury emissions during a prescribed fire in the Amazonian rain forest
https://orcid.org/0000-0001-8930-7970
Abstract Mercury stored in forests can be volatilized to the atmosphere during fires. Many factors influence this process such as mercury concentration, vegetation loading and the soil temperature reached during the fire. We quantified mercury emissions from biomass and soil during a prescribed fire in Brazil using the difference in mercury burden in vegetation and soil before and after burning, and data were critically compared with those previously obtained in a similar experiment in another part of the Amazonia. The calculated mercury emission factor was 4.1 ± 1.4 g Hg ha−1, with the main part (78%) originating from litterfall and O-horizon, and only 14% associated with live biomass. When considering the fuel burned loading, the emission factor ranged from 40 to 53 μg Hg kg−1. Data were also obtained on soil temperature profile and on Hg speciation in soil in an effort to relate these parameters to Hg emissions.
Graphical abstract Display Omitted
Highlights 4.1 ± 1.4 g mercury ha−1 were released from a prescribed fire in the Amazon basin. Litterfall and the soil O-horizon accounted for 78% of released Hg. Wood accounted for the smallest contribution emitted mercury. Gaseous mercury continued to be released from soil following the burn event.
Soil and biomass mercury emissions during a prescribed fire in the Amazonian rain forest
Melendez-Perez, Jose J. (Autor:in) / Fostier, Anne H. (Autor:in) / Carvalho, João A. Jr. (Autor:in) / Windmöller, Claudia C. (Autor:in) / Santos, José C. (Autor:in) / Carpi, Anthony (Autor:in)
Atmospheric Environment ; 96 ; 415-422
16.06.2014
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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