Relatório de Execução Material do Projecto “Respirometria da Libertação de Ácidos e a Utilização de Coberturas Consumidoras de Oxigénio como Método de Prevenir Emissões a Partir de Armazenamento de Resíduos Minerais

• Type: Technical Report
• Date: 2008

Authors

A. Fiúza (Author) FEUP; M. Cristina C. Vila (Author) FEUP; Aurora Futuro Silva (Author) FEUP; Alexandre Leite (Author) FEUP; Joaquim Góis (Author) FEUP; A. Silva (Author) FEUP; Cristina Delerue-Matos (Author) FEUP

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Associated Institutions

FCT - FCT - Fundação para a Ciência e a Tecnologia

Other information

Abstract (EN): This report is divided in six chapters. The first chapter in introductory and describes the main physical, chemical and biological phenomena involved on the generation of Acid Mine Drainage (AMD) from mining and ore processing wastes. It also refers the main type of tests that can be used to forecast both the capacity and the kinetics of acid drainage. The second chapter describes in detail the testing procedures that can be used to assess the AMD potential and describes its application to ore processing residues from the two most important Portuguese mines in activity (Neves Corvo and Panasqueira). Next chapter (3rd) describes experimental protocols to assess the accelerated dynamics of AMD and the results that were obtained with the same wastes. In the fourth part it is described how respirometry can be used to assess the relative importance and kinetics of sulphide oxidizing bacteria, using either continuous respirometry or soil bottle respirometers. The fifth chapter describes experiments conducted at pilote-scale, in an open-air experimental station conceived specially for this purpose. The measurements obtained in this installation with the wastes without cover, with a single cover and a multiple cover, are compared with the results obtained from laboratorial procedures. Finally, in the last chapter, models for diffusion of oxygen through the wastes, through an impermeable cover (clays) and through an organic cover, are presented as well an integrated model of diffusion through a multi-layer cover.

Language: Portuguese

Type (Professor's evaluation): Scientific

No. of pages: 110