Utilisation of chemically stabilized arsenic-contaminated soil in a landfill cover.

The aim of the study was to determine if an As-contaminated soil, stabilized using zerovalent iron (Fe(0)) and its combination with gypsum waste, coal fly ash, peat, or sewage sludge, could be used as a construction material at the top layer of the landfill cover. A reproduction of 2 m thick protection/vegetation layer of a landfill cover using a column setup was used to determine the ability of the amendments to reduce As solubility and stimulate soil functionality along the soil profile. Soil amendment with Fe(0) was highly efficient in reducing As in soil porewater reaching 99 % reduction, but only at the soil surface.

[Conventional radiology in the choice of surgical treatment of gonarthrosis].

Gonarthrosis is a pathologic condition the incident of which is high in people over 50. Its etiologic factors are varus-valgus deformities, traumatic lesions, meniscal tears, osteochondritis, and metabolic diseases. The authors report their experience with the setting of a radiographic protocol for the study of 100 patients over 50.