Use of coal mining waste for the removal of acidity and metal ions Al (III), Fe (III) and Mn (II) in acid mine drainage.
Environ Technol
; 29(8): 863-9, 2008 Aug.
Article
em En
| MEDLINE
| ID: mdl-18724641
ABSTRACT
The coal industry may generate acid mine drainage (AMD) and mining wastes, which may adversely affect the quality of the environment. In this study we propose the use of this waste in the removal of acidity and metal ions, as well as in the reduction of the toxicity of AMD. A physico-chemical analysis of the waste shows the presence of mainly SiO2, Al2O3 and Fe2O3 and a superficial area of 4.316 m2 g(-1). The treatment of AMD with the waste resulted in an increase in pH from 2.6 to 7.8 and removed 100% of the Al (III), 100% of the Fe (III) and 89% of the Mn (II). We also observed that the high toxicity of the AMD towards Daphnia magna (LC50 = 3.68%) and Artemia sp. (LC50 = 4.97%) was completely eliminated after treatment with the waste. The data obtained allow us to propose that the waste can be used in the treatment of AMD, providing an economic use for the waste.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Minas de Carvão
/
Metais Pesados
/
Recuperação e Remediação Ambiental
/
Alumínio
/
Resíduos Industriais
Limite:
Animals
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article