The pH-static leaching behaviour of metallurgical wastes from the Tsumeb Copper Smelter (Namibia)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F14%3A00000077" target="_blank" >RIV/00025798:_____/14:00000077 - 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

The pH-static leaching behaviour of metallurgical wastes from the Tsumeb Copper Smelter (Namibia)

Popis výsledku v původním jazyce

In this study, bag house dust and four different slags from the Tsumeb Copper Smelter (Namibia) were studied. The pH-static leaching tests (pH range 3-12) were used and contaminant leachabilities at natural pH were compared with EU criteria for non-hazardous and hazardous wastes. Bag house dust exhibited high leaching of As (up to 314 g/kg) and more than 2000x exceeded the limit value for hazardous waste. In contrast, the leaching of contaminants from slags was more pH-dependent, with highest Cu and Pbrelease under acidic conditions (up to 1780 and 752 mg/kg, respectively). However, metal leaching at natural pH was very low, far below the limits for non-hazardous wastes. Arsenic exhibited V-shaped leaching patterns with minimum at pH 6 for all the slag samples. Only in the case of the ausmelt slag the leached As exceeded the limit for hazardous waste. Our data clearly indicate extremely high As leaching from the bag house dust. We strongly support safety measures currently adopted in

Název v anglickém jazyce

The pH-static leaching behaviour of metallurgical wastes from the Tsumeb Copper Smelter (Namibia)

Popis výsledku anglicky

In this study, bag house dust and four different slags from the Tsumeb Copper Smelter (Namibia) were studied. The pH-static leaching tests (pH range 3-12) were used and contaminant leachabilities at natural pH were compared with EU criteria for non-hazardous and hazardous wastes. Bag house dust exhibited high leaching of As (up to 314 g/kg) and more than 2000x exceeded the limit value for hazardous waste. In contrast, the leaching of contaminants from slags was more pH-dependent, with highest Cu and Pbrelease under acidic conditions (up to 1780 and 752 mg/kg, respectively). However, metal leaching at natural pH was very low, far below the limits for non-hazardous wastes. Arsenic exhibited V-shaped leaching patterns with minimum at pH 6 for all the slag samples. Only in the case of the ausmelt slag the leached As exceeded the limit for hazardous waste. Our data clearly indicate extremely high As leaching from the bag house dust. We strongly support safety measures currently adopted in

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

57-61

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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