Contaminant release from massive copper metallurgical slags: Insights from long-term monolithic leaching tests

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10481177" target="_blank" >RIV/00216208:11310/23:10481177 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WD4CRS_sU2" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WD4CRS_sU2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemosphere.2023.139079" target="_blank" >10.1016/j.chemosphere.2023.139079</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Contaminant release from massive copper metallurgical slags: Insights from long-term monolithic leaching tests

Popis výsledku v původním jazyce

Compared to compliance leaching tests performed on granular materials, leaching experiments on monolithic slags are more suitable for predicting the contaminant release when large boulders or poured slag layers are submerged in water, a specific environmental scenario typical for many smelting sites. We conducted EN 15863 dynamic monolithic leaching tests on massive copper slags over a prolonged period of 168 d. The patterns of the major contaminant (Cu, Co) fluxes indicated an initial diffusion process followed by the dissolution of primary sulfides with the maximum cumulative releases attaining 75.6 mg/m2 Cu and 4.20 mg/m2 Co. A multi-method mineralogical investigation showed that lepidocrocite (γ-FeOOH) and goethite (α-FeOOH) started to form on the slag surface already after 9 d of leaching and partly immobilized Cu (but not Co). Vanadium and other trace elements (Zn, Pb, Cd) were leached to a much lower extent, initially controlled by diffusion followed by depletion and/or sorption to Fe oxyhydroxides. The results of the long-term leaching of the monolithic slag provide new information about the key processes affecting the release of metal (loid) contaminants under specific submerged conditions and have implications for the environmental management of slag disposal sites and/or potential reuse of slags in civil engineering.

Název v anglickém jazyce

Contaminant release from massive copper metallurgical slags: Insights from long-term monolithic leaching tests

Popis výsledku anglicky

Compared to compliance leaching tests performed on granular materials, leaching experiments on monolithic slags are more suitable for predicting the contaminant release when large boulders or poured slag layers are submerged in water, a specific environmental scenario typical for many smelting sites. We conducted EN 15863 dynamic monolithic leaching tests on massive copper slags over a prolonged period of 168 d. The patterns of the major contaminant (Cu, Co) fluxes indicated an initial diffusion process followed by the dissolution of primary sulfides with the maximum cumulative releases attaining 75.6 mg/m2 Cu and 4.20 mg/m2 Co. A multi-method mineralogical investigation showed that lepidocrocite (γ-FeOOH) and goethite (α-FeOOH) started to form on the slag surface already after 9 d of leaching and partly immobilized Cu (but not Co). Vanadium and other trace elements (Zn, Pb, Cd) were leached to a much lower extent, initially controlled by diffusion followed by depletion and/or sorption to Fe oxyhydroxides. The results of the long-term leaching of the monolithic slag provide new information about the key processes affecting the release of metal (loid) contaminants under specific submerged conditions and have implications for the environmental management of slag disposal sites and/or potential reuse of slags in civil engineering.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

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

2023

Kód důvěrnosti údajů

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

Název periodika

Chemosphere

ISSN

0045-6535

e-ISSN

1879-1298

Svazek periodika

335

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

139079

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85163702603