Technology applied for revitalization of the Slnečné jazerá Lakes in Senec (town in western Slovakia) produced a temporary landfi ll of pumped and separated fi ne-grained bottom sediments. To minimize disposed waste, landfi lled sediments were analysed and some potential geotechnical and environmental applications were considered. Mineral composition was studied by the X-ray diff ractometry. Grain-size analyses and tests on Atterberg consistency limits allowed the engineering-geological

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... cation: sandy (clayey) silt sa(cl)Si according to EU standards or F3 and F5, symbols MS and MI, according to STN 72 1001. Other tests: moisture, consistency and compactibility; on compacted samples, dry bulk density, compressibility and hydraulic conductivity. Geochemical analyses included: soil reaction pH, cation exchange capacity (CEC), organic matter (C org) and carbonates. Dangerous substances were analysed earlier. Comparison with relevant technical standards and limits given by law followed. Although no contamination limits for soils were reached, the sediments are neither suitable for a direct application to agricultural nor to forest soils, as C org is insuffi cient (2.5%). Nor any direct geotechnical application was found, the moisture is too high (53.3%)-they are liquid, impossible to compact, therefore, not suitable for road embankments or mineral liners of landfi lls. All other problems are less signifi cant. Addition of peat or compost to improve the soil fertility could bring the only one feasible practical application; treatment is suitable especially for decorative plants, effi ciency must be considered. Moisture reduction/consistency change cannot be reached by temporary landfi lling because of low hydraulic conductivity. Other drying methods are expensive.