Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIII
Written by Mihaela LUNGU, Radu LĂCĂTUŞU, Andrei VRÎNCEANU, Rodica LAZĂR, Ilie CALCIU
Sludge quality resulted from the Iași sewage treatment-plant and deposited in the Tomești ponds has been studied over several years, starting 2005, with the aim of land greening. The main general chemical properties of the sewage treatment sludge in process of soil formation showed that it offers normal conditions for vegetation development even though upper horizons salinization was detected that year due to drought occurrence. Zinc contents were very high in the upper horizons. The sampled plants accumulated normal macro elements quantities and only zinc out of the heavy metals in higher concentrations, especially in the roots, without prejudice to vegetation development. As compared to this situation the Tomești sewage treatment pond had reached an incipient soil formation stage in 2020 following several greening measures and the draining phenomenon which had a certain intensity and determined vegetal cover changes, from a mainly hygrophytic vegetation to a less humidity loving one.
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