Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIV
Written by Teuta BUSHI, Aida BANI, Selma MYSILHAKA, Franz OTTNER, Ilaria COLZI, Isabella BETTARINI, Seit SHALLARI
The objective of this study was to evaluate the ability of clay (nano- montmorillonite) to the remediation of natural (Ni) rich soils, having the nickel hyperaccumulator Odontarrhena calchidica test plant. The experiment was conducted in a greenhouse in a completely randomized design, with three replicates. The experiment was conducted in 2 kg plastic plot. We used four doses of clays: 0.0, 21.4, 44.3 and 64g kg-1, corresponding to 0, 30, 60 and 90 t ha-1, respectively. Throughout the experiment, the plants were regularly irrigated, and NPK fertilization was applied to ensure optimal growth conditions. After 60 days, the soil analyzed for total nickel in XRF and available nickel DTPA extraction in Atomic Absorption. The BFP and BFR of Odontarrhena chalcidica decreased significantly as a function of increasing doses of nano-montmorillonite, indicating an increase in the adsorption of nickel in the soil. However, the BFP and BFR values were high, indicating hyperaccumulation potential of O. chalcidica. Based on the results, the application of clay in agricultural nickel rich soils favors their improvement.
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