• Something wrong with this record ?

Oral bioaccessibility of metal(loid)s in dust materials from mining areas of northern Namibia

V. Ettler, M. Cihlová, A. Jarošíková, M. Mihaljevič, P. Drahota, B. Kříbek, A. Vaněk, V. Penížek, O. Sracek, M. Klementová, Z. Engel, F. Kamona, B. Mapani,

. 2019 ; 124 (-) : 205-215. [pub] 20190114

Language English Country Netherlands

Document type Journal Article, Research Support, Non-U.S. Gov't

Ore mining and processing in semi-arid areas is responsible for the generation of metal(loid)-containing dust, which is easily transported by wind to the surrounding environment. To assess the human exposure to dust-derived metal(loid)s (As, Cd, Cu, Pb, Sb, Zn), as well as the potential risks related to incidental dust ingestion, we studied mine tailing dust (n = 8), slag dust (n = 5) and smelter dust (n = 4) from old mining and smelting sites in northern Namibia (Kombat, Berg Aukas, Tsumeb). In vitro bioaccessibility testing using extraction in simulated gastric fluid (SGF) was combined with determination of grain-size distributions, chemical and mineralogical characterizations and leaching tests conducted on original dust samples and separated PM10 fractions. The bulk and bioaccessible concentrations of the metal(loid)s were ranked as follows: mine tailing dusts < slag dusts ≪ smelter dusts. Extremely high As and Pb bioaccessibilities in the smelter dusts were caused by the presence of highly soluble phases such as arsenolite (As2O3) and various metal-arsenates unstable under the acidic conditions of SGF. The exposure estimates calculated for an adult person of 70 kg at a dust ingestion rate of 50 mg/day indicated that As, Pb (and also Cd to a lesser extent) grossly exceeded tolerable daily intake limits for these contaminants in the case of slag and smelter dusts. The high risk for smelter dusts has been acknowledged, and the safety measures currently adopted by the smelter operator in Tsumeb are necessary to reduce the staff's exposure to contaminated dust. The exposure risk for the local population is only important at the unfenced disposal sites at Berg Aukas, where the PM10 exhibited high levels of bioaccessible Pb.

References provided by Crossref.org

000      
00000naa a2200000 a 4500
001      
bmc19034822
003      
CZ-PrNML
005      
20191011092732.0
007      
ta
008      
191007s2019 ne f 000 0|eng||
009      
AR
024    7_
$a 10.1016/j.envint.2018.12.027 $2 doi
035    __
$a (PubMed)30654327
040    __
$a ABA008 $b cze $d ABA008 $e AACR2
041    0_
$a eng
044    __
$a ne
100    1_
$a Ettler, Vojtěch $u Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic. Electronic address: ettler@natur.cuni.cz.
245    10
$a Oral bioaccessibility of metal(loid)s in dust materials from mining areas of northern Namibia / $c V. Ettler, M. Cihlová, A. Jarošíková, M. Mihaljevič, P. Drahota, B. Kříbek, A. Vaněk, V. Penížek, O. Sracek, M. Klementová, Z. Engel, F. Kamona, B. Mapani,
520    9_
$a Ore mining and processing in semi-arid areas is responsible for the generation of metal(loid)-containing dust, which is easily transported by wind to the surrounding environment. To assess the human exposure to dust-derived metal(loid)s (As, Cd, Cu, Pb, Sb, Zn), as well as the potential risks related to incidental dust ingestion, we studied mine tailing dust (n = 8), slag dust (n = 5) and smelter dust (n = 4) from old mining and smelting sites in northern Namibia (Kombat, Berg Aukas, Tsumeb). In vitro bioaccessibility testing using extraction in simulated gastric fluid (SGF) was combined with determination of grain-size distributions, chemical and mineralogical characterizations and leaching tests conducted on original dust samples and separated PM10 fractions. The bulk and bioaccessible concentrations of the metal(loid)s were ranked as follows: mine tailing dusts < slag dusts ≪ smelter dusts. Extremely high As and Pb bioaccessibilities in the smelter dusts were caused by the presence of highly soluble phases such as arsenolite (As2O3) and various metal-arsenates unstable under the acidic conditions of SGF. The exposure estimates calculated for an adult person of 70 kg at a dust ingestion rate of 50 mg/day indicated that As, Pb (and also Cd to a lesser extent) grossly exceeded tolerable daily intake limits for these contaminants in the case of slag and smelter dusts. The high risk for smelter dusts has been acknowledged, and the safety measures currently adopted by the smelter operator in Tsumeb are necessary to reduce the staff's exposure to contaminated dust. The exposure risk for the local population is only important at the unfenced disposal sites at Berg Aukas, where the PM10 exhibited high levels of bioaccessible Pb.
650    _2
$a dospělí $7 D000328
650    _2
$a arseničnany $7 D001149
650    _2
$a dítě $7 D002648
650    12
$a prach $x analýza $7 D004391
650    12
$a vystavení vlivu životního prostředí $7 D004781
650    _2
$a monitorování životního prostředí $7 D004784
650    _2
$a lidé $7 D006801
650    12
$a kovy $x aplikace a dávkování $x analýza $7 D008670
650    12
$a hornictví $7 D008906
650    12
$a látky znečišťující půdu $x aplikace a dávkování $x analýza $7 D012989
651    _2
$a Namibie $7 D009276
655    _2
$a časopisecké články $7 D016428
655    _2
$a práce podpořená grantem $7 D013485
700    1_
$a Cihlová, Markéta $u Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic.
700    1_
$a Jarošíková, Alice $u Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic.
700    1_
$a Mihaljevič, Martin $u Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic.
700    1_
$a Drahota, Petr $u Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic.
700    1_
$a Kříbek, Bohdan $u Czech Geological Survey, Geologická 6, 152 00 Prague 5, Czech Republic.
700    1_
$a Vaněk, Aleš $u Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6, Czech Republic.
700    1_
$a Penížek, Vít $u Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6, Czech Republic.
700    1_
$a Sracek, Ondra $u Department of Geology, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic.
700    1_
$a Klementová, Mariana $u Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic.
700    1_
$a Engel, Zbyněk $u Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic.
700    1_
$a Kamona, Fred $u Department of Geology, Faculty of Science, University of Namibia, Private Bag 13301, Windhoek, Namibia.
700    1_
$a Mapani, Ben $u Department of Geology, Faculty of Science, University of Namibia, Private Bag 13301, Windhoek, Namibia.
773    0_
$w MED00001541 $t Environment international $x 1873-6750 $g Roč. 124, č. - (2019), s. 205-215
856    41
$u https://pubmed.ncbi.nlm.nih.gov/30654327 $y Pubmed
910    __
$a ABA008 $b sig $c sign $y a $z 0
990    __
$a 20191007 $b ABA008
991    __
$a 20191011093152 $b ABA008
999    __
$a ok $b bmc $g 1451482 $s 1073372
BAS    __
$a 3
BAS    __
$a PreBMC
BMC    __
$a 2019 $b 124 $c - $d 205-215 $e 20190114 $i 1873-6750 $m Environment international $n Environ Int $x MED00001541
LZP    __
$a Pubmed-20191007

Find record

Citation metrics

Loading data ...

Archiving options

Loading data ...