The impact of mining activities and heavy metal pollution in the apuseni mountains romania
Download
1 / 21

The impact of mining activities and heavy metal pollution in the Apuseni Mountains, Romania - PowerPoint PPT Presentation


  • 833 Views
  • Uploaded on

BALWOIS Conference – 25, 29 May 2004 – Ohrid, FY Republic of Macedonia Conference on Water Observation and Information System for Decision Support. The impact of mining activities and heavy metal pollution in the Apuseni Mountains, Romania. Mihaela Serban, Graham Bird, Paul Brewer,

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'The impact of mining activities and heavy metal pollution in the Apuseni Mountains, Romania' - flora


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
The impact of mining activities and heavy metal pollution in the apuseni mountains romania l.jpg

BALWOIS Conference – 25, 29 May 2004 – Ohrid, FY Republic of Macedonia

Conference on Water Observation and Information System for Decision Support

The impact of mining activities and heavy metal pollution in the Apuseni Mountains, Romania

Mihaela Serban, Graham Bird, Paul Brewer,

Mark Macklin, Dan Balteanu

Romanian Academy

Institute of Geography

University of Wales, UK

Institute of Geography and Earth Sciences


Slide2 l.jpg

MAIN METAL MINING EXPLOITATION IN THE APUSENI MOUNTAINS Republic of Macedonia

  • River systems categories:

  • with historical mining activity, presently inactive;

  • with historical and present mining activity;

  • with opportunities for the opening of new exploitations

  • with tailings dam accidents

U K R A I N E



Data collection and laboratory methods4 l.jpg

Surface water Republic of Macedonia

Filtered through 0.45 mm membranes

Acidified with 50% HNO3

Cd, Cu, Pb and Zn determined using ICP-MS

River channel sediment

Sediments collected from bar surfaces

Air-dried for > 72 hours

Sieved through a < 63 mm mesh

Digested in 70 % HNO3

Cd, Cu, Pb and Zn determined using ICP-MS

Data collection and laboratory methods


Environmental quality guidelines l.jpg
Environmental quality guidelines Republic of Macedonia

  • Provide a means of evaluating the magnitude of metal contamination relative to potential human health effects.

  • Water quality guidelines

    • based upon EU directive 75/440/EEC

  • Sediment quality guidelines

    • established by the Dutch Ministry of Housing, Spatial Planning and Environment

  • Target value: aim to keep concentrations near to or below these value

    • e.g. 20 mg l-1 for Cu in surface water intended for consumption

  • Imperative / intervention values: risk to human health and remediation required if concentrations exceed this value

    • e.g. 50 mg l-1 for Cu in surface water intended for consumption


  • Aries and certej catchments l.jpg
    Aries and Certej catchments Republic of Macedonia

    Mialu tailings dam, Certej catcment

    Upper Aries river valley


    Slide7 l.jpg

    Certej river basin: Republic of Macedonia

    a mining affected basin

    • 78 km2 catchment containing the 40.05 km2 Certej-Coranda mining concession.

    • Mining history dating back to the Roman period.

    • Current open-cast exploitation at Coranda with ore processed in Certeju de Sus.

    • Two tailings ponds in the catchment: Miresului (inactive) and Mialu (active).

    • Historical tailings dam failure in 1971.

    • 70 samples taken from 30 sample sites.

    inactive tailings dam

    1971 accident site

    active tailings dam


    River certej cd in surface waters l.jpg
    River Certej: Cd in surface waters Republic of Macedonia

    River Certej: Cd in river channel sediment


    Floodplain soils the miresului pond l.jpg
    Floodplain soils & the Miresului pond Republic of Macedonia

    Distance from channel


    River certej results summary l.jpg
    River Certej: results summary Republic of Macedonia

    • Water and channel sediment quality degraded by mining activity, especially at Coranda.

    • 100 % and 93 % of water samples exceed EU target and imperative limits respectively. Cd concentrations exceed the imperative value by up to 298 times.

    • In channel sediments, As exceeds Dutch intervention levels at 100 % of sample sites.

    • Unlike sediment-metal concentrations, solute levels decrease with distance downstream.

    • Statistically strong relationships (< r2 = 0.72) between solute and channel sediment concentrations.

      • Possibly suggests the importance of sorption / desorption reactions



    Slide12 l.jpg

    Rosia river, a mining affected tributary Republic of Macedonia

    Rosia Poieni quarry


    River abrud cu in surface water l.jpg
    River Abrud: Cu in surface water Republic of Macedonia





    Slide17 l.jpg

    Sasar (2002-2003)vs. Arieş: metal concentrations (2002)


    Results summary l.jpg
    Results summary (2002-2003)

    • Surface waters and channel sediments of Aries tributaries are severely affected by metal mining activity.

      • Production of acid mine drainage (pH >3.8)

  • River Abrud suggests solute pollution is spatially limited.

    • 99% reduction in solute Cu levels within 2 km of Bucium mine

  • Solute As, Cd, Pb and Zn levels in the Aries comply with EU directive 75/440/EEC, despite polluted tributaries.

    • Limestone rich geology facilitates high pH (7.3 – 8.8), physical dilution

  • Cu contamination in Aries downstream of the Valea Sartas.

    • 93 % reduction after 13 km, but still exceeds EU target value

  • Cu levels exceed intervention values prior to Mures confluence, ~90 km downstream of the last contaminated tributary

    • Cu mined at Rosia Poienii

  • 2003 water sediments higher than 2002 in the upper basin

  • 2003 channel sediments higher than 2002 for all sites


  • Slide19 l.jpg

    Mures river: (2002-2003)14 sample sites


    River mures cu in surface water l.jpg
    River Mures: Cu in surface water (2002-2003)

    River Mures: Pb in river channel sediments


    Results summary21 l.jpg
    Results summary (2002-2003)

    • Despite heavily polluted tributaries and urban areas, surface waters of the River Mures are not contaminated with Cd, Cu, Pb or Zn.

      • Physical dilution and high aqueous pH (8.27 – 9.38)

  • As concentrations exceed target values at 2 sites.

    • Geology, urban pollution sources, higher pH of hydrolysis for As (XX)

  • River channel sediments at 92% of sites exceed target values for either Cd, Cu, Pb or Zn.

    • Increases in concentration downstream of mined tributaries

  • As concentrations in channel sediment fall below target values at all sites despite higher concentrations in tributaries.

  • Metal and As levels in waters and channel sediments in the River Mures do not exceed imperative / intervention values.