SharePoint
Aide
IRSN, Institut de radioprotection et de sûreté nucléaire

Search our site :

ok

Contact us :

ok
En Fr

Enhancing Nuclear Safety


Research

Publications

Environmental Impact of Uranium Mining and Ore Processing in the Lagoa Real District, Bahia, Brazil

ILSON G. CARVALHO1, ROSA CIDU2, LUCA FANFANI2, HELMUT PITSCH3, CATHERINE BEAUCAIRE4, PIERPAOLO ZUDDAS5

Environ. Sci. Technol. 2005, 39, 8646-8652

Document type > *Article de revue

Keywords > geochemistry, hydrogeology, mines, radon, uranium

Research Unit > IRSN/DESTQ/DICST

Authors > PITSCH Helmut

Publication Date > 15/11/2005

Summary

Uranium mining and processing at Lagoa Real (Bahia, Brazil) started in 2000. Hydrogeochemical monitoring carried out from 1999 to 2001 revealed generally good quality of the water resources outside and inside the mineralized area. No chemical contamination in waters for domestic uses was observed. Hydrochemical characteristics did not vary significantly after 1 year of U exploitation, as compared to premining conditions. Due to the short time of mining, the results cannot exclude future variations in water quality. Leaching experiments helped to describe processes of ore and waste degradation. Sulfate was identified as an indicator for different types of contamination. Potential hazards related to local climate (hot rainy season) were identified. They indicate that tailings derived from the ore processing, destabilized by sulfuric acid attack, may induce acidification and salinization in the surrounding environment. Another potential source of environmental impact could be linked to local radium-rich mineralization, originating radon emission.

1/ Universidade Federal Bahia. Deceased.
2/ Universita Cagliari.
3/ IRSN Fontenay aux Roses.
4/ DEN/CEA Gif-sur-Yvette.
5/ Université Paris 7. Present address: PEPS, Université Claude Bernard, Lyon 1, France.

Send Print

Contact


Close

Send to a friend

The information you provide in this page are single use only and will not be saved.
* Required fields

Recipient's email:*  

Sign with your name:* 

Type your email address:*   

Add a message :

Do you want to receive a copy of this email?

Send

Cancel

Close

WP_IMPRIMER_TITLE

WP_IMPRIMER_MESSAGE

Back

Ok