Dust from selected African metal smelters: mineralogy, contaminant bioaccessibility and exposure estimations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F14%3A00000109" target="_blank" >RIV/00025798:_____/14:00000109 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Dust from selected African metal smelters: mineralogy, contaminant bioaccessibility and exposure estimations

Popis výsledku v původním jazyce

We investigated dusts from metal smelters in the Zambian Copperbelt and northern Nambia, using a combination of mineralogical techniques (XRD, SEM/EDS, TEM/EDS), in order to understand the solid speciation of the contaminants, as well as their bioaccessibility using in vitro tests in simulated gastric and lung fluids to assess the exposure risk for humans. The leaching of metals was mainly dependent on the contaminant mineralogy. Based on our results, a potential risk can be recognized, particularly from ingestion of the dust, with bioaccessible fractions ranging from 5 to 89% of the total contaminant concentrations. In contrast, relatively low bioaccessible fractions were observed for simulated lung fluid extracts (carried out only on Zambian dusts),with values ranging from 0.01% (Pb) up to 16.5% (Co) of total contaminant concentrations. Daily intakes via oral exposure, calculated for an adult (70 kg, ingestion rate 50 mg dust per day), slightly exceeded the tolerable daily intake (T

Název v anglickém jazyce

Dust from selected African metal smelters: mineralogy, contaminant bioaccessibility and exposure estimations

Popis výsledku anglicky

We investigated dusts from metal smelters in the Zambian Copperbelt and northern Nambia, using a combination of mineralogical techniques (XRD, SEM/EDS, TEM/EDS), in order to understand the solid speciation of the contaminants, as well as their bioaccessibility using in vitro tests in simulated gastric and lung fluids to assess the exposure risk for humans. The leaching of metals was mainly dependent on the contaminant mineralogy. Based on our results, a potential risk can be recognized, particularly from ingestion of the dust, with bioaccessible fractions ranging from 5 to 89% of the total contaminant concentrations. In contrast, relatively low bioaccessible fractions were observed for simulated lung fluid extracts (carried out only on Zambian dusts),with values ranging from 0.01% (Pb) up to 16.5% (Co) of total contaminant concentrations. Daily intakes via oral exposure, calculated for an adult (70 kg, ingestion rate 50 mg dust per day), slightly exceeded the tolerable daily intake (T

Druh

D - Stať ve sborníku

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP210%2F12%2F1413" target="_blank" >GAP210/12/1413: Vliv těžby a úpravy rud na životní prostředí v Namibii: Modelování migrace polutantů v půdách, rostlinách a podzemních vodách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

Addressing environmental and health impacts of active and abandoned mines in Sub-Saharan Africa. Proceedings of the Closing Workshop of the IGCP/SIDA Projects 594 and 606,Prague, Czech Republic, May 26?28, 2014

ISBN

978-80-7075-858-8

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

37-41

Název nakladatele

Czech geological survey

Místo vydání

Prague

Místo konání akce

Praha

Datum konání akce

26. 5. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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