The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 89-911
Full Name: Nelson Rodrigues
Position: Associate Professor
Age: ON
Sex: Male
Address: Earth Sciences Dept. - FCTUC - Largo Marques de Pombal - 3000-272 COIMBRA
Country: PORTUGAL
Tel: 239860555
Tel prefix: +351
Fax: 239860501
E-mail address: nelsonr@ci.uc.pt
Other E-mails: nevrodrigues@gmail.com
Title of the Paper: Natural Immobilization of Uranium in Streams
Authors as they appear in the Paper: Nelson Rodrigues, João Pratas, Lys Tavares, André Branches
Email addresses of all the authors: nelsonr@ci.uc.pt,jpratas@ci.uc.p,lysdaniele.tavares@gmail.com,andrebranches@gmail.com
Number of paper pages: 10
Abstract: The strategies developed by plants to tolerate heavy metals dictate their survival capability in contaminated places. Sometimes they accumulate significant amounts of those elements. The accumulation ability makes them capable of retaining large amounts of metals thus avoiding the dispersion of these metals and so they become natural cleaners of the environment. This effect is sometimes referred to as natural attenuation. However this environmental control is not only due to the vegetation but also to other non-biotic agents such as chemical exchanges with waters, soils and sediments. This work intends to identify what are the principal elements in the ecosystem that are responsible for the immobilisation of uranium coming from the old mine works of Urgeiriça (it was the most important uranium mine of Portugal) and which are dripping into the stream of Pantanha (near Nelas, Viseu, Centre-North of Portugal). It has been verified that the species Apium nodiflorum, Ca!
llitriche stagnalis, and Amblystegium sp accumulate large amounts of uranium, as well as the dead leafs and the finer sediments. The uranium concentration in the waters decreases from the discharge point and this concentration drops 30 times in a 3,5 km distance with no human intervention.
Keywords: Uranium, Contamination, Natural attenuation, Urgeiriça, Phytoremediation, Ecosystem
EXTENSION of the file: .pdf
Special (Invited) Session: Causes for Uranium Immobilization in a Portuguese Stream
Organizer of the Session: 633 - 439
How Did you learn about congress: Fernando Pita: fpita@ci.uc.pt, Jose Beltrao: jbeltrao@ualg.pt, Paulo Favas: pjcf@utad.pt
IP ADDRESS: 193.136.214.190
