Risk-based imprecise post-remediation soil quality objectives.

While risk-based contaminated land management is an essential component of sustainable remediation, uncertainty is an unavoidable aspect of risk assessment, since most of the parameters that influence risk are typically affected by uncertainty. Uncertainty may be of different origins; i.e.

Permanganate oxidation of polycyclic aromatic compounds (PAHs and polar PACs): column experiments with DNAPL at residual saturation.

Permanganate is an oxidant usually applied for in situ soil remediation due to its persistence underground. It has already shown great efficiency for dense nonaqueous phase liquid (DNAPL) degradation under batch experiment conditions. In the present study, experimental permanganate oxidation of a DNAPL - coal tar - sampled in the groundwater of a former coking plant was carried out in a glass bead column.

Metal availability in a highly contaminated, dredged-sediment disposal site: field measurements and geochemical modeling.

Two complementary approaches were used to characterize arsenic and metal mobilizations from a dredged-sediment disposal site: a detailed field study combined with hydrogeochemical modeling. Contaminants in sediments were found to be mainly present as sulfides subject to oxidation. Secondary phases (carbonates, sulfates, (hydr)oxides) were also observed.

Changes in the geochemistry and ecotoxicity of a Zn and Cd contaminated dredged sediment over time after land disposal.

The management of dredged sediments is of environmental concern worldwide since they may be overloaded with myriads of pollutants. For inland waters' sediments, disposal on land is a common practice. For the long-term risks assessment of such a management, a better understanding of the fate of pollutants over time and an assessment of possible associated biological consequences are needed.

An integrated silicon thermophile as biosensor for the thermal monitoring of glucose, urea and penicillin.

A new kind of calorimetric biosensor for the measurement of the heat (molar enthalpy change) of enzymatic reactions is presented. The device operates according to the Seebeck effect, the same principle on which thermocouples are based. The thermopile used in this work consists of an array of p-type silicon/aluminium strips integrated on a thin silicon membrane (5 microns).

Flow injection analysis and biosensors: applications for biotechnology and environmental control.

Our experience in industrial bioprocess monitoring and environmental control let us develop a concept for biosensor research which distinguishes itself from other, more popular, approaches. Biosensors must improve and/or simplify existing state-of-the-art analysis systems. Only the parallel development of biosensors and their complementary metrology leads to industrially sound solutions.

[The laboratory and colposcopy in the diagnosis of urogenital trichomoniasis].

Urogenital trichomoniasis is a very common condition, the most frequent veneral disease in women. It is also the commonest cause of vaginal discharge. Nevertheless, it is often unrecognised since attenuated, latent, unusual forms are more numerous than acute forms which might lead to a suspicion of the diagnosis, and because the investigations which are necessary to make the diagnosis are not made often enough.