Treatment of drainage waters from a flotation tailings pond by a natural wetland

Groudev, SN; Georgiev, PS; Komnitsas, K; Spasova, II; Angelov, AT

dc.contributor.author	Groudev, SN	en
dc.contributor.author	Georgiev, PS	en
dc.contributor.author	Komnitsas, K	en
dc.contributor.author	Spasova, II	en
dc.contributor.author	Angelov, AT	en
dc.date.accessioned	2014-03-01T02:48:46Z
dc.date.available	2014-03-01T02:48:46Z
dc.date.issued	1999	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34102
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0033488605&partnerID=40&md5=4f0fbbf40d093f82091510e0ef3f60ba	en
dc.title	Treatment of drainage waters from a flotation tailings pond by a natural wetland	en
heal.type	conferenceItem	en
heal.publicationDate	1999	en
heal.abstract	Drainage waters from a flotation tailings pond located in Southeastern Bulgaria were treated by a passive system consisting of a natural wetland. The waters were contaminated by radioactive elements (uranium, radium, thorium), toxic heavy metals (mainly copper, cadmium, lead and manganese) and sulphates. The watercourse through the wetland covered a distance of about 300 m and the water flow rate varied in the range of about 0.3 - 1.0 l/s. The wetland was characterized by rich plant and microbial communities. The water clean-up in the wetland was very efficient during the different climatic seasons, even during the cold winter months at water temperatures as low as 2-4°C. The concentrations of contaminants in the wetland effluents were decreased below the relevant permissible levels for waters intended for use in the agriculture and/or industry. The microbial dissimilatory sulphate reduction and the sorption of contaminants on the organic matter in the wetland were the main processes connected with the water clean up. However, some other processes such as the biological oxidation and reduction of some ions, the biological agglomeration of suspended solids, free ions and different complexes as well as the sorption of contaminants by the clay minerals in the wetland were also involved and played an essential role.	en
heal.journalName	Proceedings of the TMS Fall Extraction and Processing Conference	en
dc.identifier.volume	3	en
dc.identifier.spage	2133	en
dc.identifier.epage	2140	en