43.  Zinc Mobility from Polluted and Treated Soils with Pillared Materials due to Rain Water

Authors: Masu Smaranda, Rus Valeria, Negrea Petru


Abstract:

Water acidity due to precipitation can fixe from zinc polluted soil an important quantity of metal, who are taken and stored by plants tissue. Using some immobilization agents in-situ represents a remediation technique for polluted soil, for reducing of zinc ions bioavailability. Using of some pillared materials obtained by polynuclear aluminum salts (R = molar ratio OH/Al = 2.3) settled onto natural zeolite with about 70% clinoptilolite, had as effect the reduction of Zn ions mobility, in contact with rains water. Pillared materials used, like tuf-Aln action synergic for reducing the metal mobility, in respect with the tuf components and high polymer Aln salts, at soil impact with percolated water with pH range in 5.4 6.5. Decreasing effects of zinc dissolution are 10-40 times higher in presence of pillared material than others used in this study, in the case of percolation with rains waters, pH between 5.4 6.5.


Keywords: zinc, tuf-Aln, polluted soil

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