Yastrub T. A.1, Kirsenko V. V.1, Vakal S. V.2, Itorshun M. M.3
THE PROBLEM OF HEAVY METALS IN THE PRODUCTION AND USE OF PHOSPHOROUS MINERAL FERTILIZERS (TAKING CADMIUM, LEAD, ARSENIC, AS AN EXAMPLE)
1 SI «Institute for Occupational Health of NAMS of Ukraine», Kyiv
2 SE «Sumy State Research Institute of Fertilizers and Pigments»
3 State Sanitary-Epidemiological Service of Ukraine, SE «Hygienic Regulation Committee», Kyiv
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Purpose. According to the results of the expertise of technological regulations of recycling foreign phosphates to evaluate factors, determining the content of toxic additives (taking Cd, Pb and As, as an example) in phosphate-containing fertilizers and to calculate concentrations of these compounds, applied into the soil, in comparison with their maximum allowable concentrations and clarkes.
Methods. Sanitary-epidemiological expertise of technical standards on foreign phosphates, hygienic methods of assessment of the calculated concentrations of toxic elements, applied into the soil with phosphorus-containing fertilizers.
Results. The results of distribution of toxic additives (taking Cd, Pb, As, as an example) between the extracted phosphorus acid (being a source of P2O5 for phosphorus fertilizers) and phosphogypsum (waste products) at the stages of the technological process enable to recommend amendments to the TU 24.1-14005076-065-2003 "Foreign phosphorites" concerning their permissible levels in the raw material (input control), which guarantees provision of hygienic requirements in the use of phosphorus-containing fertilizers in compliance with the above regulations to their production technology and the application rates.
Conclusion. It is recommended to make amendments in technical specifications TU 24.1-14005076-065-2003 "Foreign phosphorites", with further studying the quality of the crops, gained with the use of phosphorus-containing fertilizers.
Keywords: phosphorites, technology regulations, processing, permissible levels for Cd, Pb, As, phosphorous-containing mineral fertilizers
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