polucion de aguas subterraneas drenaje acido de roca y aguas ...

Table 2. Results of pollutants values of laboratory analysis in 4 monitoring measurements points
Site Pollutants (ppm)
pH Cu Zn Fe Mn As
1 5.27 0.04 0.52 0.13 0.09 0.00
2 5.16 0.15 1.04 0.03 0.87 0.00
4 4.18 3.11 15.80 2.91 8.20 0.03
3 3.99 2.01 12.605 4.09 8.60 0.03
4.3. Mine Water Sustainability Index
of Panasqueira Mine
For the six pollutants of mine water
assessment in the case study the
particular equation is following:
ESI mw
1
= 5
6
[ 5 + 0.
16 pH − 3.
3Cu
− Zn − 0.
Fe − Mn − As]
Applying the particular equation and
using the values resultants of the
laboratory analysis (Table 3) determines
the Mine Water Sustainability Index in
the 4 measurements points (Figure 8 and
Figure 9). The results indicate that in the
point 1 the sustainability is moderate, in
the point 2 is low must the influence of
the mine water discharge for the called
gallery ““Fonte de Masso””, in the point
3 is very low, therefore it is biggest that
caused for important mine water
discharge by called gallery ““Salgueira””
and finally in point 4 also is very low.
Measure
Point
ESImw
Value Level
1 0.84 Moderate
2 0.57 Low
3 -5.01 Very low
4 -4.04 Very Low
130
Figure 9. Mine Water Sustainability Index
in Panasqueira Mine
The ESImw values demonstrate that in
the mine water measurements date
(January 2001) the discharge of mine
water caused unsustainable situation in
superficial water of the “Bodelhão” river.
These sustainability indexes are very
useful for remediation actions and
application the Management of
Sustainable Mining Practices (SMP).
5. CONCLUSIONS
The underground mining is very
important activity and of great
importance for the human development,
but the projects must be with
environmental protection.