In situ treatment of groundwater at Burgas Copper Mines, Bulgaria, by enhancing microbial sulphate reduction

Groudev, S; Kontopoulos, A; Spasova, I; Komnitsas, K; Angelov, A; Georgiev, P

dc.contributor.author	Groudev, S	en
dc.contributor.author	Kontopoulos, A	en
dc.contributor.author	Spasova, I	en
dc.contributor.author	Komnitsas, K	en
dc.contributor.author	Angelov, A	en
dc.contributor.author	Georgiev, P	en
dc.date.accessioned	2014-03-01T01:47:14Z
dc.date.available	2014-03-01T01:47:14Z
dc.date.issued	1998	en
dc.identifier.issn	01447815	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25181
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0032439884&partnerID=40&md5=484c47a57b776a05ffcaad671af32980	en
dc.subject.other	Microbial sulfate reduction	en
dc.subject.other	Groundwater flow	en
dc.subject.other	Hydrogen sulfide removal (water treatment)	en
dc.subject.other	In situ processing	en
dc.subject.other	Water pollution control	en
dc.subject.other	Water quality	en
dc.subject.other	Groundwater pollution	en
dc.subject.other	cleanup	en
dc.subject.other	conference proceedings	en
dc.subject.other	copper	en
dc.subject.other	groundwater flow	en
dc.subject.other	groundwater pollution	en
dc.subject.other	heavy metal	en
dc.subject.other	microbial activity	en
dc.subject.other	mine waste	en
dc.subject.other	sulfate	en
dc.subject.other	Bulgaria	en
dc.subject.other	Bacteria (microorganisms)	en
dc.title	In situ treatment of groundwater at Burgas Copper Mines, Bulgaria, by enhancing microbial sulphate reduction	en
heal.type	journalArticle	en
heal.publicationDate	1998	en
heal.abstract	The groundwater in the area near the tailings ponds at the Burgas Copper Mines, Bulgaria, is contaminated with radionuclides, sulphates and toxic heavy metals (mainly copper, lead, molybdenum and manganese) by drainage waters from the pond. The groundwater level and the quality of groundwater were monitored regularly by a system of piezometers. It was found that natural cleanup processes took place during groundwater flow. The main cleanup process is the microbial dissimilatory sulphate reduction carried out by the indigenous sulphate-reducing bacteria. The hydrogen sulphide, produced as a result of this process, reduced the hexavalent uranium to the insoluble tetravalent state and precipitated the heavy metal ions as the relevant insoluble sulphides. The in situ activity of the sulphate-reducing bacteria was enhanced by adding nutrients (soluble organic matter, ammonium and phosphate ions) to the groundwater through injection boreholes. The concentration of pollutants decreased below the permissible levels after such treatment.	en
heal.journalName	IAHS-AISH Publication	en
dc.identifier.issue	250	en
dc.identifier.spage	249	en
dc.identifier.epage	255	en