Protocolos Experimentais Para Determinação dos Parâmetros de Dimensionamento de Barreiras Reactivas Permeáveis

• Type: Technical Report
• Date: 2008

Authors

A. Fiúza (Author) FEUP; Antonio Fuente (Author) FEUP; Aurora Silva (Author) FEUP; Maria Silva (Author) FEUP; Cristina Delerue-Matos (Author) FEUP; Alexandre Leite (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 into three sections: - Section 1: Research conducted with chlorinated organic compounds; - Section 2: Research developed for metallic anions, specially chromium; - Section 3: Design and simulation of reactive permeable barriers. The first Section describes the research performed in relation to the destruction of trichloroethylene in reactive permeable barriers (RPB) using iron chips: preliminary tests, batch tests, continuous tests in columns. The results obtained are also compared with alternative technologies, namely oxidation-in-situ and reduction-in-situ using nanoparticulate iron. Efficiencies obtained with different types of iron are also compared. The methods, procedures and equipped used are described in detail. The second section concerns the research accomplished relatively to the reduction of Cr(VI) to Cr(III) done by iron granules. The results obtained in batch tests and in columns are described in detail. An interpretation for the phenomenology of the reaction could be done through the usage of sophisticated methodologies, namely using an electronic scanning microscope. A new kinetic model was developed based on the heterogeneous nature of the reaction occurring. The experimental procedures are also described. Finally, in the last section it is presented an integrated methodology for designing and simulating the behaviour of the RPB, considering simultaneously the hydrogeology and the chemical reaction. First, the hydrogeological behaviour of the aquifer is compared for different geometric configuration of the funnel and gate barriers. Next, a kinetic model relating the chemical behaviour and the residence time to the properties of the water flow, both through the aquifer and the barrier, is considered leading to a methodology for designing a RPB. Finally, for a case study, a barrier is designed and its behaviour is simulated in steady and transient conditions.

Language: Portuguese

Type (Professor's evaluation): Scientific

Reference: POCI/ECM/59779/2004

No. of pages: 110