Two-step diffusion in cellular hygroscopic (vascular plant-like) materials.

Vascular plants, a vast group including conifers, flowering plants, etc., are made of a cellular hygroscopic structure containing water in the form of either free (i.e.

Analysis of water content in wood material through 1D and 2D H NMR relaxometry: Application to the determination of the dry mass of wood.

There is an increasing interest on wood as it is an environmentally sustainable product (e.g., biodegradable and renewable).

Improving the sustainability of granular iron/pumice systems for water treatment.

Metallic iron (Fe(0)) is currently used in subsurface and above-ground water filtration systems on a pragmatic basis. Recent theoretical studies have indicated that, to be sustainable, such systems should not contain more than 60% Fe(0) (vol/vol). The prediction was already validated in a Fe(0)/sand system using methylene blue as an operational tracer.

Nanoscale Metallic Iron for Environmental Remediation: Prospects and Limitations.

The amendment of the subsurface with nanoscale metallic iron particles (nano-Fe(0)) has been discussed in the literature as an efficient in situ technology for groundwater remediation. However, the introduction of this technology was controversial and its efficiency has never been univocally established. This unsatisfying situation has motivated this communication whose objective was a comprehensive discussion of the intrinsic reactivity of nano-Fe(0) based on the contemporary knowledge on the mechanism of contaminant removal by Fe(0) and a mathematical model.

An MRI-SPI and NMR relaxation study of drying-hydration coupling effect on microstructure of cement-based materials at early age.

Hydration and drying coupling effect monitoring with single point imaging profiles allowed us to evaluate "free" pore and "bounded" chemical water quantity. White cement pastes inverse Laplace analysis of T1 measurements shown original results with two components during setting. After hardening, we found three components.