Talk:Abrud (river)

Pollution
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The Abrud River has been found to be dangerously polluted with concentrations of heavy metals such as Cadmium, Copper, Manganese, lead and Zinc . The causes of this pollution are the gold mining extraction method is based on flotation. The most important pollution sources are mine tailings. The determinations were performed for samples collected in: April 2004, July 2004, September 2004, November 2004, February 2005 and May 2005. The highest concentrations were found for cadmium in September 2004: 0.17 mg/L; for copper in September 2004: 1.38 mg/L; for manganese in July 2004: 239.4 mg/L; for lead in May 2005: 0.54 mg/L; and for zinc in September 2004: 35.37 mg/L.

As indicated in the reference, the tests have not been done on the Abrud River and the concentrations do not refer to this river, but probably to some small tributaries of the Roşia River.Afil (talk) 19:27, 23 January 2008 (UTC)