Metal(loid)s remobilization and mineralogical transformations in smelter-polluted savanna soils under simulated wildfire conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F21%3A00000208" target="_blank" >RIV/00025798:_____/21:00000208 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/21:00555414 RIV/00216208:11310/21:10430041

Výsledek na webu

<a href="https://doi.org/10.1016/j.jenvman.2021.1128989" target="_blank" >https://doi.org/10.1016/j.jenvman.2021.1128989</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jenvman.2021.112899" target="_blank" >10.1016/j.jenvman.2021.112899</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Metal(loid)s remobilization and mineralogical transformations in smelter-polluted savanna soils under simulated wildfire conditions

Popis výsledku v původním jazyce

Laboratory single-stepcombustion experiments (2–8 ◦C) and experiments with a continuous temperature increase (25–7 ◦C)were coupled with mineralogical investigations of the soils, ashes, and aerosols. Metals (Cd, Cu, Pb, Zn) werereleased at >;5–600 ◦C, mostly at the highest temperatures, where complex aerosol particles, predominantlycomposed of slag-like aggregates, formed. In contrast, As exhibited several emission peaks at ~275 ◦C,~370–410 ◦C, and ~580 ◦C, reflecting its complex speciation in the solid phase and indicating its remobilization,even during wildfires with moderate soil heating. At <;0 ◦C, As was successively released via the transformationof As-bearing hydrous ferric oxides, arsenolite (As2O3) grains attached to the organic matter fragments,metal arsenates, and/or As-bearing apatite, followed by the thermal decomposition of enargite (Cu3AsS4)at >;0 ◦C. The results indicate that the active and abandoned mining and smelting sites, especially those highlyenriched in As, should be protected against wildfires, which can be responsible for substantial As re-emissions.

Název v anglickém jazyce

Metal(loid)s remobilization and mineralogical transformations in smelter-polluted savanna soils under simulated wildfire conditions

Popis výsledku anglicky

Laboratory single-stepcombustion experiments (2–8 ◦C) and experiments with a continuous temperature increase (25–7 ◦C)were coupled with mineralogical investigations of the soils, ashes, and aerosols. Metals (Cd, Cu, Pb, Zn) werereleased at >;5–600 ◦C, mostly at the highest temperatures, where complex aerosol particles, predominantlycomposed of slag-like aggregates, formed. In contrast, As exhibited several emission peaks at ~275 ◦C,~370–410 ◦C, and ~580 ◦C, reflecting its complex speciation in the solid phase and indicating its remobilization,even during wildfires with moderate soil heating. At <;0 ◦C, As was successively released via the transformationof As-bearing hydrous ferric oxides, arsenolite (As2O3) grains attached to the organic matter fragments,metal arsenates, and/or As-bearing apatite, followed by the thermal decomposition of enargite (Cu3AsS4)at >;0 ◦C. The results indicate that the active and abandoned mining and smelting sites, especially those highlyenriched in As, should be protected against wildfires, which can be responsible for substantial As re-emissions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Environmental Management

ISSN

0301-4797

e-ISSN

—

Svazek periodika

293

Číslo periodika v rámci svazku

September : 112899

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

nestránkováno

Kód UT WoS článku

000677980900002

EID výsledku v databázi Scopus

2-s2.0-85107693041