PSXI-23 Study of cadmium cumulation in agricultural products taking its geochemical distribution into account

Abstract

Abstract One of the criteria for agricultural production is its biological safety for human health. The purpose of our study was to reveal a territorial relationship between the cadmium content in non-living objects and agricultural products. Water and soil samples, wheat, and biosubstrates of farm animals from various administrative zones of Orenburg region were used as objects of the study. A total of 525 samples were analyzed. The content of cadmium in the samples was determined by the methods of Inductively Coupled argon Plasma - Atomic Emission Spectrometry and Mass Spectrometry (ICP-AES, ICP-MS). The systemic analysis of cadmium distribution in non-living objects (water and soil) indicates a pronounced relationship between the content of the xenobiotics in geochemical zones with its increased level (maximum allowable concentrations (MAC) are within 0.75) in water 0.001–0.002 mg/kg and soil - 0.104–0.12 mg/kg. The researched zone belongs to areas with developed agriculture in particular plant science with the cultivation of durum wheat. In areas with the cadmium MAC less than 0.5, the concentration of this element in wheat is on average 0.007–0.008 mg/kg. The increase in the cadmium content to 0.75 directly proportionally increases its concentration up to 0.029-0.011 mg/kg. The maximum level of cadmium accumulation is observed in parenchymatous organs: the distribution of elements was 0.25–0.51 mg/kg in the kidneys, 0.25–0.41 mg/kg in the liver and 0.05–0.06 mg/kg in the heart. The content of the studied element in the muscle tissue has relatively low values ranging from 0.005 mg/kg to 0.01 mg/kg. The studies found a direct correlation between the distribution of the studied element in the food chain, and that a long contact between animals and cadmium leads to its accumulation, increasing the risk of chronic intoxication associated with the lesion of parenchymatous organs.