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2017 ; 24
(26
): 21445-21458
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The chemistry and toxicity of discharge waters from copper mine tailing
impoundment in the valley of the Apuseni Mountains in Romania
#MMPMID28744684
Rzymski P
; Klimaszyk P
; Marszelewski W
; Borowiak D
; Mleczek M
; Nowi?ski K
; Pius B
; Niedzielski P
; Poniedzia?ek B
Environ Sci Pollut Res Int
2017[Sep]; 24
(26
): 21445-21458
PMID28744684
show ga
Copper mining generates large quantities of waste, tailings, and acid outflows
causing long-term environmental impacts and potential threats to human health.
Valea ?esei is the largest tailing impoundment in Romania, created by flooding
the valley (known as Valea ?esei) of the Metalliferous Mountains (a division of
the Apuseni Mountains) with copper mining waste. The present study (i) estimated
the total volume of tailings in this area; (ii) screened the concentration of 65
elements (rare earth and platinum group elements, alkali metals and alkali earth
metals, transition and post-transition metals and metalloids) and cyanide
concentrations in wastewater samples collected from tailing impoundment; (iii)
evaluated the toxicity of these water samples using five in vitro bioassays
employing human cells isolated from healthy donors and a short-term (1 h)
exposure model. The sampled waters were highly acidic (pH 2.1-4.9) and had high
electrical conductivity (2.80-15.61 mS cm(-1)). No cyanides were detected in any
sample. Water samples collected from the stream (AMD) inflowing to the tailing
impoundment were characterized by the greatest concentrations of alkali metals,
alkaline earth metals, transition and post-transition metals, metalloids, rare
earth elements, and noble metal group. At other sites, the elemental
concentrations were lower but remained high enough to pose a relevant risk. The
greatest magnitude of in vitro toxic effects was induced by AMD. Observed
alterations included redox imbalance in human neutrophils followed by lipid
peroxidation and decreased cell survival, significant aggregation of red blood
cells, and increased prothrombin time. The study highlights that Valea ?esei is a
large sink for toxic elements, posing environmental and health risks, and
requiring action to prevent further release of chemicals and to initiate
restoration of the area.