Study of Heavy Metal Migration from School Notebooks Paper
The aim of the work is to determine the concentration of heavy metals migration Zn, Cd, Pb, Cu and Hg in bidistillated water (bidistillate) from cardboard and paper samples of school notebooks of different manufacturers. The amount of Zn, Cd, Pb, Cu and Hg migrating into bidistilled water from cardboard and paper samples of school notebooks was determined by the method of stripping voltammetry. It is detected that Zn, Pb and Cu migrate from 12 studied samples to bidistilled water, while Cd migrates from 5 samples, and Hg - from ten samples of cardboard and paper of school notebooks. The maximum permissible migration concentrations of Zn, Cd, Pb, Hg, according to TR CU 007/2011, are not exceeded in any studied sample of cardboard and paper school notebooks. The largest total migration of heavy metals was 215.6 mg/kg or 0.379 μg from 1 sheet, and the smallest - 24.54 mg/kg or 0.177 μg from 1 sheet of the cardboard cover of the notebook.