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Arsenic sequestration by sorption processes in high-iron sediments

Janet Gordon Hering

High-iron sediments in North Haiwee Reservoir (Olancha, CA), resulting from water treatment for removal of elevated dissolved arsenic in the Los Angeles Aqueduct system, were studied to examine arsenic partitioning between solid phases and porewaters under ...

2007

Benzene Hydroxylation over FeZSM-5 Catalysts: Which Fe-sites Are Active?

Albert Renken, Lioubov Kiwi

FeZSM-5 with a wide range of Fe content (0.015–2.1 wt%) were studied in the benzene hydroxylation to phenol with nitrous oxide (C6H6:N2O = 1:5) at low temperatures (

2004

Il caso della Cogne di Aosta

Within the "industrial architecture", the thesis is – in a general sense – the story of a travel in the space (from the Liguria sea – but not only – to the Valle dlAosta mountains), and in the time (the XXth century). The structure of the narration preview ...

EPFL2002

A new Martian meteorite from Morocco: the nakhlite North West Africa 817

Philippe Gillet

North West Africa (NWA 817) is a single stone of 104 g found in the Sahara (Morocco) by meteorite hunters in November 2000. The meteorite is an unbrecciated, medium-grained olivine-bearing clinopyroxenite with a cumulate texture. It consists of zoned euhed ...

2002

Typology of recent groundwaters from different aquifer environments based on geogenic tracer elements

A key problem in environmental science and in engineering geology is the often incomplete understanding of the origin of dissolved components in groundwater. The dissolved contents of trace elements in groundwater are of special importance for groundwater ...

EPFL2001

Geochemical changes during biodegradation of petroleum hydrocarbons: Field investigations and biogeochemical modelling

David Andrew Barry

Sediment analysis using wet extraction techniques and model simulations were carried out to investigate the role of ferric iron during biodegradation of dissolved petroleum hydrocarbon compounds at a field site in Perth, Western Australia. Sediment cores w ...

1999

The Tatahouine diogenite: Mineralogical and chemical effects of sixty-three years of terrestrial residence

Philippe Gillet

Comparison between clasts of the Tatahouine diogenite, collected the day of the fall in 1931 and 63 years later in 1994, allows the evaluation of mineralogical and chemical effects of terrestrial residence on meteorites. Secondary minerals are found in the ...

1999

Coherent processing of character skeletal forms

Roger Hersch

It is well known that in the general context the similarity relation is very fuzzy and hard to define. Unfortunately, the intuitive notion of similarity is not a transitive relation: knowing that A is similar to B and that B is similar to C does not necess ...

Elsevier1997

Chemical reactions in the deep earth

Philippe Gillet

We describe an overview of the experimental chemistry and mineralogy of the Earth. The extreme pressure (1 to 365 GPa) and temperature (1000 to 6000 K) conditions prevailing in the deep Earth can be reproduced in the laboratory with shock techniques, multi ...

1997

Typologie des eaux souterraines de la molasse entre Chambéry et Linz (France, Suisse, Allemagne, Autriche)

The geochemical typology of natural subsurface waters of the Molasse basin is part of the AQUITYP project, initiated by the Geology Laboratory (GEOLEP) of the Swiss Federal Institute of Technology in Lausanne (EPFL). This study provides an overview of the ...

EPFL1995