Thermally-induced release of arsenic from minerals and phases relevant to polluted natural systems affected by wildfires

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F25%3A00617939" target="_blank" >RIV/67985831:_____/25:00617939 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/25:10494624

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0883292725000411?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0883292725000411?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apgeochem.2025.106318" target="_blank" >10.1016/j.apgeochem.2025.106318</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermally-induced release of arsenic from minerals and phases relevant to polluted natural systems affected by wildfires

Popis výsledku v původním jazyce

Fire-induced arsenic (As) emission from contaminated biomass or soil is dependent on its solid-phase speciation. To quantify the nature of this release, environmentally relevant As-bearing compounds (sulfides, sulfosalts, As-oxides, arsenates, As-doped Fe-oxyhydroxides and organic material) were experimentally heated with a linear temperature increase (25–800 °C) and simultaneous detection of As and other emitted elements. Organic As-bearing materials (fungi, dimethylarsinic acid-DMAA) exhibited the peak of As release at the lowest temperatures of 275–350 °C, followed by arsenolite (As2O3) with the maximum As emission at ∼400 °C. Realgar (As4S4) and orpiment (As2S3) exhibited the maximum As release at 425–450 °C, while enargite (Cu3AsS4) and arsenopyrite (FeAsS) released As at much higher temperatures with emission peaks at ∼625 and > 725 °C, respectively. Similarly, As-bearing Fe-oxyhydroxides emitted As at temperatures exceeding 650 °C. Arsenic emission from arsenates was rather variable and peaked at ∼700 °C for conichalcite [CaCu(AsO4)(OH)], and scorodite (FeAsO4·2H2O), while for mimetite [Pb5(AsO4)3Cl], it peaked towards the upper limit of the temperature range. These results suggest that typical low intensity wildland fires would affect only organically bound As and arsenolite, while higher intensity wildland fires could cause the redistribution of As from all studied phases, thereby posing a significant environmental risk of As redistribution beyond contaminated sites.

Název v anglickém jazyce

Thermally-induced release of arsenic from minerals and phases relevant to polluted natural systems affected by wildfires

Popis výsledku anglicky

Fire-induced arsenic (As) emission from contaminated biomass or soil is dependent on its solid-phase speciation. To quantify the nature of this release, environmentally relevant As-bearing compounds (sulfides, sulfosalts, As-oxides, arsenates, As-doped Fe-oxyhydroxides and organic material) were experimentally heated with a linear temperature increase (25–800 °C) and simultaneous detection of As and other emitted elements. Organic As-bearing materials (fungi, dimethylarsinic acid-DMAA) exhibited the peak of As release at the lowest temperatures of 275–350 °C, followed by arsenolite (As2O3) with the maximum As emission at ∼400 °C. Realgar (As4S4) and orpiment (As2S3) exhibited the maximum As release at 425–450 °C, while enargite (Cu3AsS4) and arsenopyrite (FeAsS) released As at much higher temperatures with emission peaks at ∼625 and > 725 °C, respectively. Similarly, As-bearing Fe-oxyhydroxides emitted As at temperatures exceeding 650 °C. Arsenic emission from arsenates was rather variable and peaked at ∼700 °C for conichalcite [CaCu(AsO4)(OH)], and scorodite (FeAsO4·2H2O), while for mimetite [Pb5(AsO4)3Cl], it peaked towards the upper limit of the temperature range. These results suggest that typical low intensity wildland fires would affect only organically bound As and arsenolite, while higher intensity wildland fires could cause the redistribution of As from all studied phases, thereby posing a significant environmental risk of As redistribution beyond contaminated sites.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Applied Geochemistry

ISSN

0883-2927

e-ISSN

1872-9134

Svazek periodika

182

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

106318

Kód UT WoS článku

001430935100001

EID výsledku v databázi Scopus

2-s2.0-85217977562