Treatment of acid drainage in a uranium deposit by means of a natural wetland

• Autorzy: Groudeva V. , Groudev S. , Stoyanova A.
• Konferencja: Proceedings of the International Conference Bioaccumulation of Radionuclides and Heavy Metals - as a Marker of Environmental Contamination, Kazimierz Dolny upon Vistula, Poland, September 26-28, 2004
• Języki publikacji: EN

Abstrakty

EN

Abstract Acid drainage waters generated in the uranium deposit G-1, Western Bulgaria, were treated by means of a natural wetland located in the deposit. The waters had a pH in the range of about 2.4 3.9 and contained uranium and radium radionuclides, heavy metals (copper, zinc, cadmium, iron, manganese), arsenic and sulphates in concentrations usually much higher than the relevant permissible levels for waters intended for use in the agriculture and/or industry. The wetland was characterized by abundant and emergent vegetation and a diverse microflora. Typha latifolia, Typha angustifolia and Phragmites australis were the main plant species in the wetland but representatives of the genera Scirpus, Juncus, Eleocharis, Potamogeton, Carex and Poa as well as different algae were also present. The water flow through the wetland varied in the range at about 0.2 1.2 l/s reflecting water residence times in the wetland of about 10 50 hours. An efficient water cleanup took place in the wetland, even during the cold winter months at ambient temperatures close to 0°C. The removal of pollutants was due to different processes but the microbial dissimilatory sulphate reduction and the sorption of pollutants on organic matter (living and dead plant and microbial biomass) and clays present in the wetland played the main role.

Słowa kluczowe

EN

acid mine drainage; bioremediation; natural wetland; uranium; water cleanup

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2004
• Tom: Vol. 49,suppl.1
• Strony: 17--20
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Groudeva V.

• Faculty of Biology, University of Sofia, 8 Dragan Tzankov Boul, 1421, Sofia, Bulgaria

autor

Groudev S.

• Department of Engineering Geoecology, University of Mining and Geology, Studentski grad-Durvenitza, Sofia 1700, Bulgaria, Tel./Fax: [phone]

autor

Stoyanova A.

• Faculty of Biology, University of Sofia, 8 Dragan Tzankov Boul, 1421, Sofia, Bulgaria

Bibliografia

• 1. Groudeva VI, Groudev SN (1998) Cleaning of acid mine drainage from uranium mine by means of a passive treatment system. Miner Process Extr Metall Rev 19:89−95
• 2. Groudeva VI, Ivanova IA, Groudev SN, Uzunov GC (1993) Enhance oil recovery by stimulating the activity of the indigenous microflora of oil reservoir. In: Hydrometallurgical technologies. TMS, The Minerals, Metals & Material Society, Warrendale, PA. Vol II, pp 349−356
• 3. Karavaiko GI, Rossi G, Agate AD, Groudev SN, Avakyan ZA (1988) Biogeotechnology of metals. Manual. GKNT International Projects, Moscow
• 4. Tessier A, Campbell PGC, Bisson M (1979). Sequential extraction procedure for speciation of particulate trace metals. Anal Chem 51;7:844−851
• 5. Widdel F, Bak F (1991) Gram-negative mesophillic sulphatereducing bacteria. In: The prokaryotes, 2nd ed. Springer, New York. Vol IV, pp 3352−3378
• 6. Widdel F, Hansen TA (1991) The dissimilatory sulphate and sulphur-reducing bacteria. In: The prokaryotes, 2nd ed. Springer, New York. Vol IV, pp 583−624
• 7. Younger PL (ed) (1997) Mine water treatment using wetlands. University of Newcastle, Newcastle, UK