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Plant-based protein matrices can be used for the formulation of delivery systems of cinnamic acid. Pumpkin, pea and almond protein matrices were used for the formulation of dried complexes. The matrices were used in varying amounts (1%, 2%, 5% and 10%) whilst the amount of cinnamic acid was maintained constant. The obtained complexes were analyzed by HPLC, DSC and FTIR-ATR. The highest amounts of cinnamic acid were determined on complexes prepared by the lowest amounts of protein matrices, regardless of their type. The highest affinity for cinnamic acid adsorption was determined for the pumpkin protein matrix. DSC analysis revealed that adsorption of cinnamic acid caused an increase in the thermal stability of the almond protein matrix, while the other two matrices had the opposite behavior. The complexation of protein matrices and cinnamic acid was proven by recording the IR spectra. The obtained complexes could have potential applications in food products to achieve enrichment with cinnamic acid as well as proteins.

The pos si bil ity of re tain ing Cs + and Co 2+ bound by im mo bi li za tion pro cesses in the ce ment ma trix is de fined as the sub ject of its in ves ti ga tion: the ce ment ma trix for mu la tion, the water/ce ment ra tio, the amount of waste, and the po ros ity of such a struc ture. Im ple ment ing the stan dard leach ing method by Hespe the pos si bil ity of com par ing dif fer ent au thors' re sults was achieved. Dif fu sion and semi-em pir i cal model were used to in ves ti gate the trans port phenom e non in or der to pre dict the leach ing level for a long pe riod of time. Leach ing of Co 2+ and Cs + ions un der dy namic con di tions im mo bi lized in the ce ment ma trix dy namic con di tions decreases with the in crease of the sludge con tent, re gard ing po ros ity in crease. The ef fects of the dif fu sion and sur face wash ing are equal ized, and the con tri bu tion of the ma trix dis so lu tion to the Cs + and Co 2+ trans port in the ce ment po rous me dia in creases, on av er age, for one or der of mag ni tude. The semi-em pir i cal model gives a better ap prox i ma tion for Co 2+ and Cs + leaching pro cess for the du ra tion of the ex per i ment while both mod els sig nif i cantly ap prox i mate leach ing re sults in dy namic con di tions.

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